/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 06:58:09,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 06:58:09,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 06:58:09,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 06:58:10,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 06:58:10,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 06:58:10,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 06:58:10,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 06:58:10,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 06:58:10,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 06:58:10,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 06:58:10,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 06:58:10,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 06:58:10,032 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 06:58:10,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 06:58:10,034 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 06:58:10,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 06:58:10,053 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 06:58:10,089 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 06:58:10,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 06:58:10,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 06:58:10,090 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 06:58:10,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 06:58:10,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 06:58:10,092 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 06:58:10,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 06:58:10,092 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 06:58:10,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 06:58:10,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 06:58:10,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 06:58:10,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 06:58:10,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 06:58:10,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 06:58:10,094 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 06:58:10,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 06:58:10,094 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 06:58:10,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 06:58:10,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 06:58:10,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 06:58:10,094 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 06:58:10,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 06:58:10,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:58:10,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 06:58:10,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 06:58:10,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 06:58:10,095 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 06:58:10,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 06:58:10,095 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 06:58:10,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 06:58:10,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 06:58:10,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 06:58:10,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 06:58:10,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 06:58:10,397 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 06:58:10,398 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 06:58:10,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl [2021-06-05 06:58:10,399 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl' [2021-06-05 06:58:10,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 06:58:10,427 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 06:58:10,428 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 06:58:10,428 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 06:58:10,429 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 06:58:10,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:10" (1/1) ... [2021-06-05 06:58:10,445 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:10" (1/1) ... [2021-06-05 06:58:10,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 06:58:10,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 06:58:10,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 06:58:10,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 06:58:10,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:10" (1/1) ... [2021-06-05 06:58:10,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:10" (1/1) ... [2021-06-05 06:58:10,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:10" (1/1) ... [2021-06-05 06:58:10,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:10" (1/1) ... [2021-06-05 06:58:10,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:10" (1/1) ... [2021-06-05 06:58:10,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:10" (1/1) ... [2021-06-05 06:58:10,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:10" (1/1) ... [2021-06-05 06:58:10,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 06:58:10,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 06:58:10,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 06:58:10,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 06:58:10,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:58:10,548 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 06:58:10,549 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 06:58:10,549 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 06:58:10,549 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 06:58:10,549 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 06:58:10,549 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 06:58:10,550 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 06:58:10,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 06:58:10,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 06:58:10,551 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 06:58:10,744 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 06:58:10,744 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 06:58:10,746 INFO L202 PluginConnector]: Adding new model queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:58:10 BoogieIcfgContainer [2021-06-05 06:58:10,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 06:58:10,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 06:58:10,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 06:58:10,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 06:58:10,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:10" (1/2) ... [2021-06-05 06:58:10,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc77117 and model type queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:58:10, skipping insertion in model container [2021-06-05 06:58:10,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:58:10" (2/2) ... [2021-06-05 06:58:10,752 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2-nl.wvr.bpl [2021-06-05 06:58:10,756 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 06:58:10,756 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 06:58:10,757 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 06:58:10,757 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 06:58:10,796 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 06:58:10,814 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 06:58:10,829 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 06:58:10,829 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 06:58:10,829 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 06:58:10,829 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 06:58:10,829 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 06:58:10,830 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 06:58:10,830 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 06:58:10,830 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 06:58:10,837 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 29 transitions, 74 flow [2021-06-05 06:58:10,874 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 106 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 105 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:10,876 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 105 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:10,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 06:58:10,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:10,883 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:10,883 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:10,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:10,901 INFO L82 PathProgramCache]: Analyzing trace with hash 474732689, now seen corresponding path program 1 times [2021-06-05 06:58:10,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:10,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105737668] [2021-06-05 06:58:10,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:11,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:11,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105737668] [2021-06-05 06:58:11,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105737668] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:58:11,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:58:11,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:58:11,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087553973] [2021-06-05 06:58:11,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:58:11,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:11,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:58:11,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:58:11,037 INFO L87 Difference]: Start difference. First operand has 106 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 105 states have internal predecessors, (205), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:11,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:11,060 INFO L93 Difference]: Finished difference Result 114 states and 223 transitions. [2021-06-05 06:58:11,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:58:11,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 06:58:11,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:11,070 INFO L225 Difference]: With dead ends: 114 [2021-06-05 06:58:11,070 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 06:58:11,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:58:11,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 06:58:11,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-06-05 06:58:11,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.9734513274336283) internal successors, (223), 113 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 223 transitions. [2021-06-05 06:58:11,111 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 223 transitions. Word has length 16 [2021-06-05 06:58:11,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:11,112 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 223 transitions. [2021-06-05 06:58:11,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:11,112 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 223 transitions. [2021-06-05 06:58:11,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:58:11,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:11,114 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:11,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 06:58:11,114 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:11,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:11,115 INFO L82 PathProgramCache]: Analyzing trace with hash 518092661, now seen corresponding path program 1 times [2021-06-05 06:58:11,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:11,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773887419] [2021-06-05 06:58:11,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:11,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:11,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773887419] [2021-06-05 06:58:11,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773887419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:11,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916644573] [2021-06-05 06:58:11,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:11,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:58:11,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:11,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916644573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:11,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:11,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 06:58:11,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665321008] [2021-06-05 06:58:11,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:58:11,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:11,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:58:11,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:58:11,921 INFO L87 Difference]: Start difference. First operand 114 states and 223 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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) [2021-06-05 06:58:12,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:12,586 INFO L93 Difference]: Finished difference Result 285 states and 537 transitions. [2021-06-05 06:58:12,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:58:12,587 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21 [2021-06-05 06:58:12,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:12,608 INFO L225 Difference]: With dead ends: 285 [2021-06-05 06:58:12,608 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 06:58:12,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 758.7ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:58:12,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 06:58:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 153. [2021-06-05 06:58:12,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.9407894736842106) internal successors, (295), 152 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:12,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 295 transitions. [2021-06-05 06:58:12,658 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 295 transitions. Word has length 21 [2021-06-05 06:58:12,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:12,658 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 295 transitions. [2021-06-05 06:58:12,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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) [2021-06-05 06:58:12,658 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 295 transitions. [2021-06-05 06:58:12,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:58:12,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:12,660 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:12,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 06:58:12,881 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:12,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:12,882 INFO L82 PathProgramCache]: Analyzing trace with hash 434307019, now seen corresponding path program 2 times [2021-06-05 06:58:12,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:12,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222544410] [2021-06-05 06:58:12,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:13,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:13,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222544410] [2021-06-05 06:58:13,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222544410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:13,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207410422] [2021-06-05 06:58:13,086 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:13,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:13,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:13,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:58:13,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:13,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207410422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:13,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:13,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 06:58:13,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847089151] [2021-06-05 06:58:13,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:58:13,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:13,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:58:13,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:58:13,407 INFO L87 Difference]: Start difference. First operand 153 states and 295 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 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) [2021-06-05 06:58:13,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:13,978 INFO L93 Difference]: Finished difference Result 261 states and 498 transitions. [2021-06-05 06:58:13,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:58:13,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 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 21 [2021-06-05 06:58:13,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:13,980 INFO L225 Difference]: With dead ends: 261 [2021-06-05 06:58:13,980 INFO L226 Difference]: Without dead ends: 250 [2021-06-05 06:58:13,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 595.1ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:58:13,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-05 06:58:13,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 157. [2021-06-05 06:58:13,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.9423076923076923) internal successors, (303), 156 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:13,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 303 transitions. [2021-06-05 06:58:13,991 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 303 transitions. Word has length 21 [2021-06-05 06:58:13,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:13,992 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 303 transitions. [2021-06-05 06:58:13,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 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) [2021-06-05 06:58:13,992 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 303 transitions. [2021-06-05 06:58:13,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:58:13,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:13,993 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:14,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:14,201 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:14,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:14,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1316372743, now seen corresponding path program 3 times [2021-06-05 06:58:14,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:14,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85453713] [2021-06-05 06:58:14,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:14,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:14,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85453713] [2021-06-05 06:58:14,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85453713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:14,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730732963] [2021-06-05 06:58:14,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:14,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:58:14,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:14,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:58:14,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:14,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730732963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:14,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:14,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 06:58:14,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133224921] [2021-06-05 06:58:14,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:14,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:14,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:14,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:14,593 INFO L87 Difference]: Start difference. First operand 157 states and 303 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:15,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:15,309 INFO L93 Difference]: Finished difference Result 218 states and 421 transitions. [2021-06-05 06:58:15,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:58:15,309 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 21 [2021-06-05 06:58:15,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:15,310 INFO L225 Difference]: With dead ends: 218 [2021-06-05 06:58:15,310 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 06:58:15,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 642.6ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:58:15,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 06:58:15,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 155. [2021-06-05 06:58:15,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.9415584415584415) internal successors, (299), 154 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:15,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 299 transitions. [2021-06-05 06:58:15,318 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 299 transitions. Word has length 21 [2021-06-05 06:58:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:15,318 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 299 transitions. [2021-06-05 06:58:15,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:15,318 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 299 transitions. [2021-06-05 06:58:15,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:58:15,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:15,320 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:15,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:15,533 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:15,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:15,533 INFO L82 PathProgramCache]: Analyzing trace with hash -254211763, now seen corresponding path program 4 times [2021-06-05 06:58:15,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:15,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123623823] [2021-06-05 06:58:15,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:15,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:15,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123623823] [2021-06-05 06:58:15,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123623823] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:58:15,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:58:15,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 06:58:15,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915750631] [2021-06-05 06:58:15,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:58:15,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:15,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:58:15,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:58:15,559 INFO L87 Difference]: Start difference. First operand 155 states and 299 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:15,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:15,564 INFO L93 Difference]: Finished difference Result 157 states and 301 transitions. [2021-06-05 06:58:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:58:15,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 06:58:15,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:15,570 INFO L225 Difference]: With dead ends: 157 [2021-06-05 06:58:15,570 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 06:58:15,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:58:15,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 06:58:15,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-06-05 06:58:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.9294871794871795) internal successors, (301), 156 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:15,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 301 transitions. [2021-06-05 06:58:15,575 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 301 transitions. Word has length 21 [2021-06-05 06:58:15,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:15,575 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 301 transitions. [2021-06-05 06:58:15,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:15,575 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 301 transitions. [2021-06-05 06:58:15,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:58:15,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:15,576 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:15,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 06:58:15,577 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:15,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:15,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1770972429, now seen corresponding path program 5 times [2021-06-05 06:58:15,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:15,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269042926] [2021-06-05 06:58:15,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:15,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:15,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269042926] [2021-06-05 06:58:15,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269042926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:15,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519775571] [2021-06-05 06:58:15,741 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:15,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:15,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:15,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:58:15,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:15,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:58:15,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:15,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:15,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:15,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 06:58:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:16,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519775571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:16,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:16,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 06:58:16,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133597793] [2021-06-05 06:58:16,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:58:16,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:16,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:58:16,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:58:16,019 INFO L87 Difference]: Start difference. First operand 157 states and 301 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2021-06-05 06:58:16,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:16,666 INFO L93 Difference]: Finished difference Result 270 states and 508 transitions. [2021-06-05 06:58:16,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:58:16,667 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 21 [2021-06-05 06:58:16,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:16,669 INFO L225 Difference]: With dead ends: 270 [2021-06-05 06:58:16,669 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 06:58:16,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 630.4ms TimeCoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:58:16,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 06:58:16,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 168. [2021-06-05 06:58:16,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.9401197604790419) internal successors, (324), 167 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:16,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 324 transitions. [2021-06-05 06:58:16,675 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 324 transitions. Word has length 21 [2021-06-05 06:58:16,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:16,675 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 324 transitions. [2021-06-05 06:58:16,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2021-06-05 06:58:16,676 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 324 transitions. [2021-06-05 06:58:16,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:58:16,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:16,677 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:16,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:16,893 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:16,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:16,893 INFO L82 PathProgramCache]: Analyzing trace with hash -173262425, now seen corresponding path program 6 times [2021-06-05 06:58:16,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:16,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353114087] [2021-06-05 06:58:16,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:17,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:17,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353114087] [2021-06-05 06:58:17,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353114087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:17,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132200697] [2021-06-05 06:58:17,087 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:17,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 06:58:17,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:17,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:58:17,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:17,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132200697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:17,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:17,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 06:58:17,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661601187] [2021-06-05 06:58:17,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:17,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:17,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:17,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:17,255 INFO L87 Difference]: Start difference. First operand 168 states and 324 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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) [2021-06-05 06:58:17,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:17,614 INFO L93 Difference]: Finished difference Result 266 states and 501 transitions. [2021-06-05 06:58:17,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:58:17,615 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 21 [2021-06-05 06:58:17,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:17,616 INFO L225 Difference]: With dead ends: 266 [2021-06-05 06:58:17,616 INFO L226 Difference]: Without dead ends: 259 [2021-06-05 06:58:17,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 371.6ms TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:58:17,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-05 06:58:17,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 167. [2021-06-05 06:58:17,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.9397590361445782) internal successors, (322), 166 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 322 transitions. [2021-06-05 06:58:17,622 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 322 transitions. Word has length 21 [2021-06-05 06:58:17,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:17,622 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 322 transitions. [2021-06-05 06:58:17,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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) [2021-06-05 06:58:17,622 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 322 transitions. [2021-06-05 06:58:17,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:58:17,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:17,623 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:17,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 06:58:17,837 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:17,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:17,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1345776373, now seen corresponding path program 7 times [2021-06-05 06:58:17,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:17,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513775275] [2021-06-05 06:58:17,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:17,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:17,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513775275] [2021-06-05 06:58:17,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513775275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:17,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374562342] [2021-06-05 06:58:17,980 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:18,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:58:18,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:18,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374562342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:18,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:18,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-06-05 06:58:18,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855171689] [2021-06-05 06:58:18,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:58:18,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:18,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:58:18,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:58:18,207 INFO L87 Difference]: Start difference. First operand 167 states and 322 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 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) [2021-06-05 06:58:18,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:18,587 INFO L93 Difference]: Finished difference Result 278 states and 521 transitions. [2021-06-05 06:58:18,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:58:18,588 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 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 21 [2021-06-05 06:58:18,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:18,589 INFO L225 Difference]: With dead ends: 278 [2021-06-05 06:58:18,589 INFO L226 Difference]: Without dead ends: 271 [2021-06-05 06:58:18,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 380.6ms TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:58:18,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-06-05 06:58:18,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 160. [2021-06-05 06:58:18,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.9433962264150944) internal successors, (309), 159 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:18,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 309 transitions. [2021-06-05 06:58:18,594 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 309 transitions. Word has length 21 [2021-06-05 06:58:18,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:18,595 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 309 transitions. [2021-06-05 06:58:18,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 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) [2021-06-05 06:58:18,595 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 309 transitions. [2021-06-05 06:58:18,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:58:18,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:18,596 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:18,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:18,809 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:18,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:18,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1431272511, now seen corresponding path program 8 times [2021-06-05 06:58:18,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:18,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187589359] [2021-06-05 06:58:18,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:18,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:18,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187589359] [2021-06-05 06:58:18,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187589359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:18,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159516983] [2021-06-05 06:58:18,944 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:18,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:18,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:18,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 06:58:18,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:19,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 06:58:19,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:19,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:19,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:19,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:13 [2021-06-05 06:58:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:19,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159516983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:19,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:19,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 06:58:19,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358955329] [2021-06-05 06:58:19,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:19,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:19,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:19,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:19,141 INFO L87 Difference]: Start difference. First operand 160 states and 309 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:19,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:19,499 INFO L93 Difference]: Finished difference Result 249 states and 468 transitions. [2021-06-05 06:58:19,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:58:19,499 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 21 [2021-06-05 06:58:19,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:19,501 INFO L225 Difference]: With dead ends: 249 [2021-06-05 06:58:19,501 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 06:58:19,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 341.8ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:58:19,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 06:58:19,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 167. [2021-06-05 06:58:19,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.9457831325301205) internal successors, (323), 166 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:19,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 323 transitions. [2021-06-05 06:58:19,509 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 323 transitions. Word has length 21 [2021-06-05 06:58:19,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:19,509 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 323 transitions. [2021-06-05 06:58:19,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:19,510 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 323 transitions. [2021-06-05 06:58:19,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:58:19,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:19,511 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:19,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:19,725 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:19,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:19,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1981629061, now seen corresponding path program 9 times [2021-06-05 06:58:19,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:19,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954529654] [2021-06-05 06:58:19,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:19,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:19,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954529654] [2021-06-05 06:58:19,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954529654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:19,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597649225] [2021-06-05 06:58:19,880 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:19,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:58:19,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:19,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:58:19,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:20,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597649225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:20,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:20,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 06:58:20,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192081626] [2021-06-05 06:58:20,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:20,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:20,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:20,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:20,038 INFO L87 Difference]: Start difference. First operand 167 states and 323 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:20,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:20,607 INFO L93 Difference]: Finished difference Result 209 states and 397 transitions. [2021-06-05 06:58:20,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:58:20,607 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 21 [2021-06-05 06:58:20,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:20,608 INFO L225 Difference]: With dead ends: 209 [2021-06-05 06:58:20,608 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 06:58:20,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 560.8ms TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:58:20,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 06:58:20,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 165. [2021-06-05 06:58:20,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.9451219512195121) internal successors, (319), 164 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:20,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 319 transitions. [2021-06-05 06:58:20,613 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 319 transitions. Word has length 21 [2021-06-05 06:58:20,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:20,614 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 319 transitions. [2021-06-05 06:58:20,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:20,614 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 319 transitions. [2021-06-05 06:58:20,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:58:20,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:20,614 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:20,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 06:58:20,829 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:20,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:20,829 INFO L82 PathProgramCache]: Analyzing trace with hash -512962343, now seen corresponding path program 10 times [2021-06-05 06:58:20,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:20,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117793799] [2021-06-05 06:58:20,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:20,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:20,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117793799] [2021-06-05 06:58:20,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117793799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:20,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256853822] [2021-06-05 06:58:20,972 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:20,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:20,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:21,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:58:21,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:21,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256853822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:21,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:21,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 06:58:21,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548550247] [2021-06-05 06:58:21,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:58:21,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:21,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:58:21,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:58:21,125 INFO L87 Difference]: Start difference. First operand 165 states and 319 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:21,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:21,380 INFO L93 Difference]: Finished difference Result 258 states and 486 transitions. [2021-06-05 06:58:21,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:58:21,381 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 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 21 [2021-06-05 06:58:21,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:21,382 INFO L225 Difference]: With dead ends: 258 [2021-06-05 06:58:21,382 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 06:58:21,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:58:21,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 06:58:21,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 164. [2021-06-05 06:58:21,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.9447852760736197) internal successors, (317), 163 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:21,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 317 transitions. [2021-06-05 06:58:21,387 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 317 transitions. Word has length 21 [2021-06-05 06:58:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:21,387 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 317 transitions. [2021-06-05 06:58:21,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:21,387 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 317 transitions. [2021-06-05 06:58:21,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:58:21,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:21,387 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:21,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:21,605 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:21,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:21,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1006076455, now seen corresponding path program 11 times [2021-06-05 06:58:21,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:21,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38546519] [2021-06-05 06:58:21,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:21,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:21,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38546519] [2021-06-05 06:58:21,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38546519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:21,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052688740] [2021-06-05 06:58:21,756 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:21,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:21,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:21,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:58:21,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:21,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:58:21,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:21,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:21,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:21,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 06:58:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:21,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052688740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:21,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:21,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 06:58:21,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816864051] [2021-06-05 06:58:21,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:58:21,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:21,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:58:21,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:58:21,988 INFO L87 Difference]: Start difference. First operand 164 states and 317 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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) [2021-06-05 06:58:22,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:22,514 INFO L93 Difference]: Finished difference Result 292 states and 542 transitions. [2021-06-05 06:58:22,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:58:22,515 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 21 [2021-06-05 06:58:22,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:22,516 INFO L225 Difference]: With dead ends: 292 [2021-06-05 06:58:22,516 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 06:58:22,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 544.6ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:58:22,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 06:58:22,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 154. [2021-06-05 06:58:22,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.934640522875817) internal successors, (296), 153 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:22,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 296 transitions. [2021-06-05 06:58:22,521 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 296 transitions. Word has length 21 [2021-06-05 06:58:22,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:22,521 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 296 transitions. [2021-06-05 06:58:22,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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) [2021-06-05 06:58:22,521 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 296 transitions. [2021-06-05 06:58:22,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:58:22,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:22,522 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:22,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:22,733 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:22,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:22,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1156661139, now seen corresponding path program 1 times [2021-06-05 06:58:22,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:22,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931759999] [2021-06-05 06:58:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:22,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:22,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931759999] [2021-06-05 06:58:22,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931759999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:22,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712098787] [2021-06-05 06:58:22,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:22,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:58:22,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:22,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:58:22,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:22,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:22,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:22,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 06:58:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:22,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712098787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:22,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:22,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 06:58:22,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272564517] [2021-06-05 06:58:22,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:58:22,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:22,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:58:22,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:58:22,859 INFO L87 Difference]: Start difference. First operand 154 states and 296 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) [2021-06-05 06:58:22,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:22,916 INFO L93 Difference]: Finished difference Result 212 states and 411 transitions. [2021-06-05 06:58:22,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:58:22,916 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 25 [2021-06-05 06:58:22,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:22,917 INFO L225 Difference]: With dead ends: 212 [2021-06-05 06:58:22,917 INFO L226 Difference]: Without dead ends: 212 [2021-06-05 06:58:22,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:58:22,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-06-05 06:58:22,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 168. [2021-06-05 06:58:22,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.9880239520958083) internal successors, (332), 167 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:22,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 332 transitions. [2021-06-05 06:58:22,922 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 332 transitions. Word has length 25 [2021-06-05 06:58:22,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:22,922 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 332 transitions. [2021-06-05 06:58:22,923 INFO L483 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) [2021-06-05 06:58:22,923 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 332 transitions. [2021-06-05 06:58:22,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:22,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:22,923 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:23,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 06:58:23,145 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:23,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:23,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1808824559, now seen corresponding path program 12 times [2021-06-05 06:58:23,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:23,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265267554] [2021-06-05 06:58:23,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:23,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:23,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265267554] [2021-06-05 06:58:23,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265267554] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:58:23,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:58:23,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 06:58:23,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774111017] [2021-06-05 06:58:23,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:58:23,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:23,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:58:23,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:58:23,177 INFO L87 Difference]: Start difference. First operand 168 states and 332 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:23,188 INFO L93 Difference]: Finished difference Result 416 states and 813 transitions. [2021-06-05 06:58:23,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:58:23,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:23,190 INFO L225 Difference]: With dead ends: 416 [2021-06-05 06:58:23,190 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 06:58:23,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:58:23,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 06:58:23,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 330. [2021-06-05 06:58:23,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.0395136778115504) internal successors, (671), 329 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:23,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 671 transitions. [2021-06-05 06:58:23,199 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 671 transitions. Word has length 26 [2021-06-05 06:58:23,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:23,199 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 671 transitions. [2021-06-05 06:58:23,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:23,199 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 671 transitions. [2021-06-05 06:58:23,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:23,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:23,204 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:23,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 06:58:23,204 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:23,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:23,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1542332851, now seen corresponding path program 2 times [2021-06-05 06:58:23,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:23,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72357217] [2021-06-05 06:58:23,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:23,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:23,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72357217] [2021-06-05 06:58:23,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72357217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:23,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627212776] [2021-06-05 06:58:23,530 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:23,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:23,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:23,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:23,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:23,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 06:58:23,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:23,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:23,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:23,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:27 [2021-06-05 06:58:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:23,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627212776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:23,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:23,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 30 [2021-06-05 06:58:23,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440465726] [2021-06-05 06:58:23,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:58:23,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:23,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:58:23,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:58:23,999 INFO L87 Difference]: Start difference. First operand 330 states and 671 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 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) [2021-06-05 06:58:24,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:24,986 INFO L93 Difference]: Finished difference Result 496 states and 979 transitions. [2021-06-05 06:58:24,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:58:24,986 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 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 30 [2021-06-05 06:58:24,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:24,988 INFO L225 Difference]: With dead ends: 496 [2021-06-05 06:58:24,988 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 06:58:24,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1070.1ms TimeCoverageRelationStatistics Valid=189, Invalid=1973, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:58:24,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 06:58:25,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 355. [2021-06-05 06:58:25,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.0141242937853105) internal successors, (713), 354 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:25,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 713 transitions. [2021-06-05 06:58:25,002 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 713 transitions. Word has length 30 [2021-06-05 06:58:25,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:25,003 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 713 transitions. [2021-06-05 06:58:25,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 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) [2021-06-05 06:58:25,003 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 713 transitions. [2021-06-05 06:58:25,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:25,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:25,004 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:25,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 06:58:25,217 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:25,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:25,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1773063399, now seen corresponding path program 3 times [2021-06-05 06:58:25,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:25,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310757087] [2021-06-05 06:58:25,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:25,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:25,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310757087] [2021-06-05 06:58:25,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310757087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:25,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884602614] [2021-06-05 06:58:25,525 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:25,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:58:25,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:25,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:58:25,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:25,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:58:25,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:25,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:25,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:25,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-06-05 06:58:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:25,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884602614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:25,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:25,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-06-05 06:58:25,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856058608] [2021-06-05 06:58:25,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 06:58:25,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:25,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 06:58:25,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:58:25,934 INFO L87 Difference]: Start difference. First operand 355 states and 713 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:27,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:27,109 INFO L93 Difference]: Finished difference Result 538 states and 1048 transitions. [2021-06-05 06:58:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:58:27,110 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 30 [2021-06-05 06:58:27,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:27,112 INFO L225 Difference]: With dead ends: 538 [2021-06-05 06:58:27,112 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 06:58:27,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1054.9ms TimeCoverageRelationStatistics Valid=210, Invalid=2142, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:58:27,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 06:58:27,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 384. [2021-06-05 06:58:27,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.0078328981723237) internal successors, (769), 383 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:27,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 769 transitions. [2021-06-05 06:58:27,123 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 769 transitions. Word has length 30 [2021-06-05 06:58:27,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:27,123 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 769 transitions. [2021-06-05 06:58:27,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:27,123 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 769 transitions. [2021-06-05 06:58:27,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:27,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:27,124 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:27,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 06:58:27,341 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:27,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:27,341 INFO L82 PathProgramCache]: Analyzing trace with hash -890997675, now seen corresponding path program 4 times [2021-06-05 06:58:27,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:27,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096829129] [2021-06-05 06:58:27,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:27,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:27,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096829129] [2021-06-05 06:58:27,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096829129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:27,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780156741] [2021-06-05 06:58:27,690 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:27,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:27,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:27,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:27,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:27,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 06:58:27,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:27,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:27,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:27,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-06-05 06:58:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:28,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780156741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:28,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:28,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-06-05 06:58:28,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301578123] [2021-06-05 06:58:28,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 06:58:28,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:28,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 06:58:28,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:58:28,130 INFO L87 Difference]: Start difference. First operand 384 states and 769 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:29,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:29,545 INFO L93 Difference]: Finished difference Result 458 states and 895 transitions. [2021-06-05 06:58:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:58:29,545 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 30 [2021-06-05 06:58:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:29,547 INFO L225 Difference]: With dead ends: 458 [2021-06-05 06:58:29,547 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 06:58:29,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1497.4ms TimeCoverageRelationStatistics Valid=266, Invalid=2490, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:58:29,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 06:58:29,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 380. [2021-06-05 06:58:29,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.0079155672823217) internal successors, (761), 379 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 761 transitions. [2021-06-05 06:58:29,557 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 761 transitions. Word has length 30 [2021-06-05 06:58:29,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:29,558 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 761 transitions. [2021-06-05 06:58:29,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:29,558 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 761 transitions. [2021-06-05 06:58:29,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:29,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:29,559 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:29,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:29,782 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:29,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:29,782 INFO L82 PathProgramCache]: Analyzing trace with hash 577669043, now seen corresponding path program 5 times [2021-06-05 06:58:29,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:29,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612935945] [2021-06-05 06:58:29,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:29,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:30,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:30,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612935945] [2021-06-05 06:58:30,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612935945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:30,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700382829] [2021-06-05 06:58:30,084 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:30,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:58:30,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:30,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:30,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:30,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:58:30,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:30,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:30,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:30,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-06-05 06:58:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:30,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700382829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:30,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:30,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-06-05 06:58:30,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671773627] [2021-06-05 06:58:30,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 06:58:30,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:30,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 06:58:30,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:58:30,486 INFO L87 Difference]: Start difference. First operand 380 states and 761 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:31,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:31,526 INFO L93 Difference]: Finished difference Result 539 states and 1057 transitions. [2021-06-05 06:58:31,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:58:31,526 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 30 [2021-06-05 06:58:31,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:31,527 INFO L225 Difference]: With dead ends: 539 [2021-06-05 06:58:31,528 INFO L226 Difference]: Without dead ends: 522 [2021-06-05 06:58:31,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 979.1ms TimeCoverageRelationStatistics Valid=212, Invalid=1950, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:58:31,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-06-05 06:58:31,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 378. [2021-06-05 06:58:31,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.0079575596816976) internal successors, (757), 377 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:31,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 757 transitions. [2021-06-05 06:58:31,538 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 757 transitions. Word has length 30 [2021-06-05 06:58:31,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:31,538 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 757 transitions. [2021-06-05 06:58:31,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:31,538 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 757 transitions. [2021-06-05 06:58:31,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:31,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:31,539 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:31,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 06:58:31,755 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:31,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:31,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2096707841, now seen corresponding path program 6 times [2021-06-05 06:58:31,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:31,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007543003] [2021-06-05 06:58:31,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:32,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:32,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007543003] [2021-06-05 06:58:32,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007543003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:32,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691110217] [2021-06-05 06:58:32,044 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:32,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:58:32,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:32,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:58:32,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:32,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:58:32,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:32,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:32,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:32,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-06-05 06:58:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:32,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691110217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:32,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:32,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-06-05 06:58:32,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912425699] [2021-06-05 06:58:32,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:58:32,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:32,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:58:32,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:58:32,452 INFO L87 Difference]: Start difference. First operand 378 states and 757 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:33,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:33,402 INFO L93 Difference]: Finished difference Result 565 states and 1100 transitions. [2021-06-05 06:58:33,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:58:33,402 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 30 [2021-06-05 06:58:33,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:33,404 INFO L225 Difference]: With dead ends: 565 [2021-06-05 06:58:33,404 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 06:58:33,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 923.2ms TimeCoverageRelationStatistics Valid=204, Invalid=1866, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:58:33,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 06:58:33,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 368. [2021-06-05 06:58:33,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.008174386920981) internal successors, (737), 367 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:33,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 737 transitions. [2021-06-05 06:58:33,414 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 737 transitions. Word has length 30 [2021-06-05 06:58:33,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:33,414 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 737 transitions. [2021-06-05 06:58:33,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:33,414 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 737 transitions. [2021-06-05 06:58:33,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:33,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:33,415 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:33,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:33,638 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:33,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:33,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1300690841, now seen corresponding path program 7 times [2021-06-05 06:58:33,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:33,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880652348] [2021-06-05 06:58:33,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:33,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:33,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880652348] [2021-06-05 06:58:33,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880652348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:33,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062994361] [2021-06-05 06:58:33,906 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:33,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:33,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:34,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 06:58:34,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:34,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:34,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:34,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-06-05 06:58:34,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:34,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062994361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:34,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:34,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-06-05 06:58:34,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92950124] [2021-06-05 06:58:34,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 06:58:34,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:34,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 06:58:34,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:58:34,281 INFO L87 Difference]: Start difference. First operand 368 states and 737 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:35,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:35,354 INFO L93 Difference]: Finished difference Result 558 states and 1086 transitions. [2021-06-05 06:58:35,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:58:35,354 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 30 [2021-06-05 06:58:35,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:35,356 INFO L225 Difference]: With dead ends: 558 [2021-06-05 06:58:35,356 INFO L226 Difference]: Without dead ends: 525 [2021-06-05 06:58:35,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 922.3ms TimeCoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:58:35,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-05 06:58:35,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 366. [2021-06-05 06:58:35,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.0082191780821916) internal successors, (733), 365 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:35,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 733 transitions. [2021-06-05 06:58:35,364 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 733 transitions. Word has length 30 [2021-06-05 06:58:35,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:35,364 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 733 transitions. [2021-06-05 06:58:35,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:35,365 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 733 transitions. [2021-06-05 06:58:35,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:35,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:35,366 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:35,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:35,588 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:35,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:35,589 INFO L82 PathProgramCache]: Analyzing trace with hash -317786151, now seen corresponding path program 8 times [2021-06-05 06:58:35,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:35,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339868962] [2021-06-05 06:58:35,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:35,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:35,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:35,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339868962] [2021-06-05 06:58:35,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339868962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:35,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412109543] [2021-06-05 06:58:35,863 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:35,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:35,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:35,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:35,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:36,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 06:58:36,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:36,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:36,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:36,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-06-05 06:58:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:36,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412109543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:36,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:36,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2021-06-05 06:58:36,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387016547] [2021-06-05 06:58:36,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:58:36,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:36,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:58:36,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:58:36,319 INFO L87 Difference]: Start difference. First operand 366 states and 733 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:37,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:37,453 INFO L93 Difference]: Finished difference Result 571 states and 1107 transitions. [2021-06-05 06:58:37,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:58:37,453 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 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 30 [2021-06-05 06:58:37,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:37,454 INFO L225 Difference]: With dead ends: 571 [2021-06-05 06:58:37,454 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 06:58:37,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1071.8ms TimeCoverageRelationStatistics Valid=204, Invalid=2148, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:58:37,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 06:58:37,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 364. [2021-06-05 06:58:37,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.0110192837465566) internal successors, (730), 363 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:37,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 730 transitions. [2021-06-05 06:58:37,462 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 730 transitions. Word has length 30 [2021-06-05 06:58:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:37,462 INFO L482 AbstractCegarLoop]: Abstraction has 364 states and 730 transitions. [2021-06-05 06:58:37,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:37,462 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 730 transitions. [2021-06-05 06:58:37,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:37,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:37,463 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:37,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 06:58:37,681 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:37,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:37,681 INFO L82 PathProgramCache]: Analyzing trace with hash -479791381, now seen corresponding path program 9 times [2021-06-05 06:58:37,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:37,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380992289] [2021-06-05 06:58:37,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:37,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:37,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380992289] [2021-06-05 06:58:37,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380992289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:37,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50130896] [2021-06-05 06:58:37,975 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:38,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:58:38,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:38,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:58:38,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:38,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:58:38,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:38,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:38,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:38,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-05 06:58:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:38,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50130896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:38,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:38,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2021-06-05 06:58:38,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407914909] [2021-06-05 06:58:38,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:58:38,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:38,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:58:38,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:58:38,416 INFO L87 Difference]: Start difference. First operand 364 states and 730 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:39,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:39,403 INFO L93 Difference]: Finished difference Result 511 states and 1006 transitions. [2021-06-05 06:58:39,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:58:39,404 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 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 30 [2021-06-05 06:58:39,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:39,405 INFO L225 Difference]: With dead ends: 511 [2021-06-05 06:58:39,405 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 06:58:39,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1067.8ms TimeCoverageRelationStatistics Valid=204, Invalid=2148, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:58:39,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 06:58:39,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 364. [2021-06-05 06:58:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.0110192837465566) internal successors, (730), 363 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:39,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 730 transitions. [2021-06-05 06:58:39,413 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 730 transitions. Word has length 30 [2021-06-05 06:58:39,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:39,413 INFO L482 AbstractCegarLoop]: Abstraction has 364 states and 730 transitions. [2021-06-05 06:58:39,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:39,413 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 730 transitions. [2021-06-05 06:58:39,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:39,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:39,414 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:39,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:39,634 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:39,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:39,635 INFO L82 PathProgramCache]: Analyzing trace with hash 207465881, now seen corresponding path program 10 times [2021-06-05 06:58:39,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:39,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579584695] [2021-06-05 06:58:39,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:39,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:39,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:39,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579584695] [2021-06-05 06:58:39,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579584695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:39,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355781137] [2021-06-05 06:58:39,973 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:39,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:39,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:40,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:40,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:40,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 06:58:40,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:40,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:40,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:40,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 06:58:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:40,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355781137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:40,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:40,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:58:40,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579907962] [2021-06-05 06:58:40,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:58:40,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:40,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:58:40,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:58:40,401 INFO L87 Difference]: Start difference. First operand 364 states and 730 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:42,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:42,050 INFO L93 Difference]: Finished difference Result 655 states and 1289 transitions. [2021-06-05 06:58:42,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:58:42,050 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 06:58:42,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:42,052 INFO L225 Difference]: With dead ends: 655 [2021-06-05 06:58:42,052 INFO L226 Difference]: Without dead ends: 646 [2021-06-05 06:58:42,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1499.5ms TimeCoverageRelationStatistics Valid=300, Invalid=3240, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:58:42,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-06-05 06:58:42,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 386. [2021-06-05 06:58:42,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.0233766233766235) internal successors, (779), 385 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:42,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 779 transitions. [2021-06-05 06:58:42,060 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 779 transitions. Word has length 30 [2021-06-05 06:58:42,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:42,060 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 779 transitions. [2021-06-05 06:58:42,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:42,060 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 779 transitions. [2021-06-05 06:58:42,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:42,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:42,061 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:42,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 06:58:42,273 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:42,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:42,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1089531605, now seen corresponding path program 11 times [2021-06-05 06:58:42,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:42,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012804184] [2021-06-05 06:58:42,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:42,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:42,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012804184] [2021-06-05 06:58:42,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012804184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:42,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128784443] [2021-06-05 06:58:42,573 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:42,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:58:42,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:42,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:58:42,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:42,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:58:42,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:42,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:42,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:42,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 06:58:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:43,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128784443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:43,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:43,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:58:43,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762188708] [2021-06-05 06:58:43,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:58:43,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:43,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:58:43,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:58:43,050 INFO L87 Difference]: Start difference. First operand 386 states and 779 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:44,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:44,934 INFO L93 Difference]: Finished difference Result 584 states and 1151 transitions. [2021-06-05 06:58:44,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:58:44,934 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 06:58:44,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:44,936 INFO L225 Difference]: With dead ends: 584 [2021-06-05 06:58:44,936 INFO L226 Difference]: Without dead ends: 569 [2021-06-05 06:58:44,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1722.0ms TimeCoverageRelationStatistics Valid=342, Invalid=3318, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:58:44,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-06-05 06:58:44,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 384. [2021-06-05 06:58:44,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.023498694516971) internal successors, (775), 383 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:44,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 775 transitions. [2021-06-05 06:58:44,945 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 775 transitions. Word has length 30 [2021-06-05 06:58:44,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:44,945 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 775 transitions. [2021-06-05 06:58:44,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:44,945 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 775 transitions. [2021-06-05 06:58:44,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:44,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:44,946 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:45,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 06:58:45,168 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:45,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:45,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1736768973, now seen corresponding path program 12 times [2021-06-05 06:58:45,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:45,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647530119] [2021-06-05 06:58:45,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:45,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:45,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647530119] [2021-06-05 06:58:45,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647530119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:45,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835537287] [2021-06-05 06:58:45,501 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:45,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:58:45,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:45,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:58:45,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:45,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:58:45,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:45,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:45,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:45,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 06:58:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:45,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835537287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:45,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:45,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 06:58:45,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519930075] [2021-06-05 06:58:45,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:58:45,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:45,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:58:45,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:58:45,886 INFO L87 Difference]: Start difference. First operand 384 states and 775 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:47,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:47,553 INFO L93 Difference]: Finished difference Result 713 states and 1395 transitions. [2021-06-05 06:58:47,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:58:47,554 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 06:58:47,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:47,556 INFO L225 Difference]: With dead ends: 713 [2021-06-05 06:58:47,556 INFO L226 Difference]: Without dead ends: 696 [2021-06-05 06:58:47,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1530.6ms TimeCoverageRelationStatistics Valid=316, Invalid=3344, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:58:47,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-06-05 06:58:47,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 393. [2021-06-05 06:58:47,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.017857142857143) internal successors, (791), 392 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:47,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 791 transitions. [2021-06-05 06:58:47,564 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 791 transitions. Word has length 30 [2021-06-05 06:58:47,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:47,564 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 791 transitions. [2021-06-05 06:58:47,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:47,564 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 791 transitions. [2021-06-05 06:58:47,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:47,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:47,565 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:47,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:47,787 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:47,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:47,787 INFO L82 PathProgramCache]: Analyzing trace with hash -217730175, now seen corresponding path program 13 times [2021-06-05 06:58:47,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:47,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66597513] [2021-06-05 06:58:47,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:48,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:48,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66597513] [2021-06-05 06:58:48,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66597513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:48,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073168854] [2021-06-05 06:58:48,108 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:48,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:48,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:48,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 06:58:48,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:48,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:48,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:48,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 06:58:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:48,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073168854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:48,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:48,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:58:48,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198021067] [2021-06-05 06:58:48,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:58:48,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:48,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:58:48,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:58:48,568 INFO L87 Difference]: Start difference. First operand 393 states and 791 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:50,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:50,374 INFO L93 Difference]: Finished difference Result 712 states and 1392 transitions. [2021-06-05 06:58:50,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:58:50,374 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 06:58:50,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:50,376 INFO L225 Difference]: With dead ends: 712 [2021-06-05 06:58:50,376 INFO L226 Difference]: Without dead ends: 668 [2021-06-05 06:58:50,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1571.3ms TimeCoverageRelationStatistics Valid=331, Invalid=3575, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:58:50,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-06-05 06:58:50,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 386. [2021-06-05 06:58:50,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.005194805194805) internal successors, (772), 385 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:50,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 772 transitions. [2021-06-05 06:58:50,383 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 772 transitions. Word has length 30 [2021-06-05 06:58:50,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:50,384 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 772 transitions. [2021-06-05 06:58:50,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:50,384 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 772 transitions. [2021-06-05 06:58:50,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:50,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:50,385 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:50,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 06:58:50,601 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:50,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:50,601 INFO L82 PathProgramCache]: Analyzing trace with hash -848150583, now seen corresponding path program 14 times [2021-06-05 06:58:50,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:50,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961382814] [2021-06-05 06:58:50,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:50,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:50,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961382814] [2021-06-05 06:58:50,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961382814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:50,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989396277] [2021-06-05 06:58:50,903 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:50,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:50,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:50,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:50,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:51,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:58:51,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:51,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:51,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:51,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 06:58:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:51,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989396277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:51,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:51,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:58:51,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024627015] [2021-06-05 06:58:51,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:58:51,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:51,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:58:51,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:58:51,318 INFO L87 Difference]: Start difference. First operand 386 states and 772 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:52,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:52,553 INFO L93 Difference]: Finished difference Result 559 states and 1100 transitions. [2021-06-05 06:58:52,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:58:52,553 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 06:58:52,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:52,554 INFO L225 Difference]: With dead ends: 559 [2021-06-05 06:58:52,554 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 06:58:52,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1165.0ms TimeCoverageRelationStatistics Valid=235, Invalid=2417, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:58:52,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 06:58:52,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 388. [2021-06-05 06:58:52,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0025839793281652) internal successors, (775), 387 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 775 transitions. [2021-06-05 06:58:52,564 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 775 transitions. Word has length 30 [2021-06-05 06:58:52,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:52,564 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 775 transitions. [2021-06-05 06:58:52,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:52,564 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 775 transitions. [2021-06-05 06:58:52,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:52,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:52,565 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:52,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:52,781 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:52,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:52,781 INFO L82 PathProgramCache]: Analyzing trace with hash 33915141, now seen corresponding path program 15 times [2021-06-05 06:58:52,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:52,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454167114] [2021-06-05 06:58:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:53,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:53,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:53,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454167114] [2021-06-05 06:58:53,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454167114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:53,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522330602] [2021-06-05 06:58:53,085 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:53,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:58:53,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:53,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:53,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:53,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:58:53,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:53,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:53,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:53,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 06:58:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:53,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522330602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:53,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:53,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:58:53,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388827427] [2021-06-05 06:58:53,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:58:53,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:53,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:58:53,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:58:53,519 INFO L87 Difference]: Start difference. First operand 388 states and 775 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:54,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:54,955 INFO L93 Difference]: Finished difference Result 487 states and 964 transitions. [2021-06-05 06:58:54,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:58:54,956 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 06:58:54,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:54,957 INFO L225 Difference]: With dead ends: 487 [2021-06-05 06:58:54,957 INFO L226 Difference]: Without dead ends: 464 [2021-06-05 06:58:54,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1373.1ms TimeCoverageRelationStatistics Valid=266, Invalid=2490, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:58:54,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-05 06:58:54,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 378. [2021-06-05 06:58:54,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.0159151193633953) internal successors, (760), 377 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:54,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 760 transitions. [2021-06-05 06:58:54,963 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 760 transitions. Word has length 30 [2021-06-05 06:58:54,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:54,963 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 760 transitions. [2021-06-05 06:58:54,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:54,964 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 760 transitions. [2021-06-05 06:58:54,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:54,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:54,965 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:55,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 06:58:55,173 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:55,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:55,173 INFO L82 PathProgramCache]: Analyzing trace with hash -844092509, now seen corresponding path program 16 times [2021-06-05 06:58:55,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:55,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860019514] [2021-06-05 06:58:55,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:55,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:55,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860019514] [2021-06-05 06:58:55,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860019514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:55,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455138606] [2021-06-05 06:58:55,414 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:55,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:55,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:55,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:55,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:55,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 06:58:55,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:55,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:55,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:55,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-06-05 06:58:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:55,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455138606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:55,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:55,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-06-05 06:58:55,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319294963] [2021-06-05 06:58:55,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:58:55,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:55,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:58:55,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:58:55,815 INFO L87 Difference]: Start difference. First operand 378 states and 760 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:56,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:56,810 INFO L93 Difference]: Finished difference Result 568 states and 1127 transitions. [2021-06-05 06:58:56,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:58:56,811 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 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 30 [2021-06-05 06:58:56,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:56,812 INFO L225 Difference]: With dead ends: 568 [2021-06-05 06:58:56,812 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 06:58:56,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1056.0ms TimeCoverageRelationStatistics Valid=215, Invalid=2137, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:58:56,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 06:58:56,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 376. [2021-06-05 06:58:56,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.018666666666667) internal successors, (757), 375 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 757 transitions. [2021-06-05 06:58:56,819 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 757 transitions. Word has length 30 [2021-06-05 06:58:56,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:56,819 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 757 transitions. [2021-06-05 06:58:56,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:56,819 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 757 transitions. [2021-06-05 06:58:56,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:56,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:56,820 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:57,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 06:58:57,037 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:57,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:57,037 INFO L82 PathProgramCache]: Analyzing trace with hash -357955005, now seen corresponding path program 17 times [2021-06-05 06:58:57,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:57,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115550483] [2021-06-05 06:58:57,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:57,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:57,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:57,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115550483] [2021-06-05 06:58:57,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115550483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:57,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600984371] [2021-06-05 06:58:57,383 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:57,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:57,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:57,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:57,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:57,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 06:58:57,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:57,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:57,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:57,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 06:58:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:57,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600984371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:57,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:57,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:58:57,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166613231] [2021-06-05 06:58:57,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:58:57,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:57,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:58:57,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:58:57,845 INFO L87 Difference]: Start difference. First operand 376 states and 757 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:59,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:59,032 INFO L93 Difference]: Finished difference Result 547 states and 1076 transitions. [2021-06-05 06:58:59,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:58:59,032 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 06:58:59,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:59,033 INFO L225 Difference]: With dead ends: 547 [2021-06-05 06:58:59,033 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 06:58:59,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1206.0ms TimeCoverageRelationStatistics Valid=233, Invalid=2419, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:58:59,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 06:58:59,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 391. [2021-06-05 06:58:59,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0153846153846153) internal successors, (786), 390 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 786 transitions. [2021-06-05 06:58:59,040 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 786 transitions. Word has length 30 [2021-06-05 06:58:59,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:59,040 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 786 transitions. [2021-06-05 06:58:59,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:59,040 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 786 transitions. [2021-06-05 06:58:59,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:59,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:59,041 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:59,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:59,253 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:59,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:59,253 INFO L82 PathProgramCache]: Analyzing trace with hash 524110719, now seen corresponding path program 18 times [2021-06-05 06:58:59,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:59,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626408324] [2021-06-05 06:58:59,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:59,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:59,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626408324] [2021-06-05 06:58:59,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626408324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:59,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345261566] [2021-06-05 06:58:59,538 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:59,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 06:58:59,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:59,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:59,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:59,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:58:59,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:59,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:59,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:59,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 06:58:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:59,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345261566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:59,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:59,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:58:59,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946806838] [2021-06-05 06:58:59,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:58:59,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:59,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:58:59,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:58:59,960 INFO L87 Difference]: Start difference. First operand 391 states and 786 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:01,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:01,395 INFO L93 Difference]: Finished difference Result 498 states and 987 transitions. [2021-06-05 06:59:01,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:59:01,395 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 06:59:01,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:01,397 INFO L225 Difference]: With dead ends: 498 [2021-06-05 06:59:01,397 INFO L226 Difference]: Without dead ends: 483 [2021-06-05 06:59:01,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1343.7ms TimeCoverageRelationStatistics Valid=264, Invalid=2492, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:59:01,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-05 06:59:01,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 389. [2021-06-05 06:59:01,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.015463917525773) internal successors, (782), 388 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:01,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 782 transitions. [2021-06-05 06:59:01,403 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 782 transitions. Word has length 30 [2021-06-05 06:59:01,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:01,403 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 782 transitions. [2021-06-05 06:59:01,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:01,404 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 782 transitions. [2021-06-05 06:59:01,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:01,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:01,405 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:01,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:01,621 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:01,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:01,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1992777437, now seen corresponding path program 19 times [2021-06-05 06:59:01,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:01,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070930014] [2021-06-05 06:59:01,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:01,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:01,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070930014] [2021-06-05 06:59:01,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070930014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:01,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363396306] [2021-06-05 06:59:01,946 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:01,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:59:01,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:02,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 06:59:02,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:02,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:02,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:02,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 06:59:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:02,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363396306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:02,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:02,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 06:59:02,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67248126] [2021-06-05 06:59:02,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:59:02,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:02,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:59:02,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:59:02,361 INFO L87 Difference]: Start difference. First operand 389 states and 782 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:03,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:03,508 INFO L93 Difference]: Finished difference Result 558 states and 1104 transitions. [2021-06-05 06:59:03,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:59:03,508 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 06:59:03,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:03,509 INFO L225 Difference]: With dead ends: 558 [2021-06-05 06:59:03,509 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 06:59:03,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1129.8ms TimeCoverageRelationStatistics Valid=224, Invalid=2128, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:59:03,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 06:59:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 381. [2021-06-05 06:59:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0157894736842104) internal successors, (766), 380 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:03,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 766 transitions. [2021-06-05 06:59:03,516 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 766 transitions. Word has length 30 [2021-06-05 06:59:03,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:03,516 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 766 transitions. [2021-06-05 06:59:03,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 766 transitions. [2021-06-05 06:59:03,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:03,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:03,517 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:03,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 06:59:03,740 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:03,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:03,740 INFO L82 PathProgramCache]: Analyzing trace with hash -353896931, now seen corresponding path program 20 times [2021-06-05 06:59:03,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:03,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508346132] [2021-06-05 06:59:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:03,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:03,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:03,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508346132] [2021-06-05 06:59:03,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508346132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:03,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74134433] [2021-06-05 06:59:03,980 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:04,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:04,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:04,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:59:04,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:04,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:59:04,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:04,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:04,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:04,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-06-05 06:59:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:04,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74134433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:04,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:04,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-06-05 06:59:04,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205191972] [2021-06-05 06:59:04,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:59:04,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:04,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:59:04,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:59:04,372 INFO L87 Difference]: Start difference. First operand 381 states and 766 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:05,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:05,450 INFO L93 Difference]: Finished difference Result 541 states and 1073 transitions. [2021-06-05 06:59:05,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:59:05,450 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 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 30 [2021-06-05 06:59:05,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:05,452 INFO L225 Difference]: With dead ends: 541 [2021-06-05 06:59:05,452 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 06:59:05,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 963.1ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:59:05,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 06:59:05,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 379. [2021-06-05 06:59:05,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.015873015873016) internal successors, (762), 378 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:05,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 762 transitions. [2021-06-05 06:59:05,457 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 762 transitions. Word has length 30 [2021-06-05 06:59:05,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:05,457 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 762 transitions. [2021-06-05 06:59:05,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:05,457 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 762 transitions. [2021-06-05 06:59:05,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:05,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:05,458 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:05,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:05,659 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:05,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:05,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1601561625, now seen corresponding path program 21 times [2021-06-05 06:59:05,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:05,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415230193] [2021-06-05 06:59:05,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:05,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:05,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415230193] [2021-06-05 06:59:05,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415230193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:05,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587579977] [2021-06-05 06:59:05,940 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:05,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:59:05,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:05,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:59:05,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:06,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 06:59:06,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:06,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:06,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:06,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-06-05 06:59:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:06,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587579977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:06,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:06,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-05 06:59:06,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961117462] [2021-06-05 06:59:06,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:59:06,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:06,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:59:06,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:59:06,418 INFO L87 Difference]: Start difference. First operand 379 states and 762 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:07,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:07,480 INFO L93 Difference]: Finished difference Result 542 states and 1074 transitions. [2021-06-05 06:59:07,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:59:07,480 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 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 30 [2021-06-05 06:59:07,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:07,481 INFO L225 Difference]: With dead ends: 542 [2021-06-05 06:59:07,481 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 06:59:07,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1108.3ms TimeCoverageRelationStatistics Valid=210, Invalid=2240, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:59:07,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 06:59:07,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 377. [2021-06-05 06:59:07,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.018617021276596) internal successors, (759), 376 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:07,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 759 transitions. [2021-06-05 06:59:07,487 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 759 transitions. Word has length 30 [2021-06-05 06:59:07,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:07,487 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 759 transitions. [2021-06-05 06:59:07,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:07,487 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 759 transitions. [2021-06-05 06:59:07,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:07,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:07,488 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:07,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 06:59:07,710 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:07,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:07,710 INFO L82 PathProgramCache]: Analyzing trace with hash -2036560307, now seen corresponding path program 22 times [2021-06-05 06:59:07,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:07,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086891194] [2021-06-05 06:59:07,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:08,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:08,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086891194] [2021-06-05 06:59:08,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086891194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:08,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070674234] [2021-06-05 06:59:08,075 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:08,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:08,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:08,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:59:08,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:08,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 06:59:08,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:08,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:08,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:08,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 06:59:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:08,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070674234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:08,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:08,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:59:08,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415416016] [2021-06-05 06:59:08,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:59:08,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:08,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:59:08,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:59:08,574 INFO L87 Difference]: Start difference. First operand 377 states and 759 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:09,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:09,914 INFO L93 Difference]: Finished difference Result 569 states and 1111 transitions. [2021-06-05 06:59:09,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:59:09,914 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 06:59:09,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:09,915 INFO L225 Difference]: With dead ends: 569 [2021-06-05 06:59:09,915 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 06:59:09,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1375.5ms TimeCoverageRelationStatistics Valid=252, Invalid=2610, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:59:09,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 06:59:09,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 406. [2021-06-05 06:59:09,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:09,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 815 transitions. [2021-06-05 06:59:09,921 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 815 transitions. Word has length 30 [2021-06-05 06:59:09,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:09,921 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 815 transitions. [2021-06-05 06:59:09,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:09,921 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 815 transitions. [2021-06-05 06:59:09,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:09,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:09,921 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:10,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 06:59:10,122 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:10,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:10,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1154494583, now seen corresponding path program 23 times [2021-06-05 06:59:10,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:10,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440708052] [2021-06-05 06:59:10,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:10,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:10,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:10,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440708052] [2021-06-05 06:59:10,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440708052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:10,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093336006] [2021-06-05 06:59:10,480 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:10,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:10,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:10,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:59:10,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:10,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:59:10,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:10,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:10,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:10,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 06:59:10,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:10,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093336006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:10,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:10,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:59:10,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390990555] [2021-06-05 06:59:10,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:59:10,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:10,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:59:10,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:59:10,944 INFO L87 Difference]: Start difference. First operand 406 states and 815 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:12,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:12,648 INFO L93 Difference]: Finished difference Result 487 states and 955 transitions. [2021-06-05 06:59:12,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:59:12,648 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 06:59:12,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:12,649 INFO L225 Difference]: With dead ends: 487 [2021-06-05 06:59:12,649 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 06:59:12,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1665.1ms TimeCoverageRelationStatistics Valid=310, Invalid=2996, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:59:12,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 06:59:12,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 402. [2021-06-05 06:59:12,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0124688279301743) internal successors, (807), 401 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:12,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 807 transitions. [2021-06-05 06:59:12,654 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 807 transitions. Word has length 30 [2021-06-05 06:59:12,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:12,654 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 807 transitions. [2021-06-05 06:59:12,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:12,654 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 807 transitions. [2021-06-05 06:59:12,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:12,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:12,655 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:12,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 06:59:12,877 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:12,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:12,877 INFO L82 PathProgramCache]: Analyzing trace with hash 314172135, now seen corresponding path program 24 times [2021-06-05 06:59:12,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:12,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199822642] [2021-06-05 06:59:12,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:13,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:13,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199822642] [2021-06-05 06:59:13,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199822642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:13,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486977149] [2021-06-05 06:59:13,163 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:13,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 06:59:13,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:13,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:59:13,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:13,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:59:13,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:13,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:13,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:13,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 06:59:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:13,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486977149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:13,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:13,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 06:59:13,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267117947] [2021-06-05 06:59:13,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:59:13,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:13,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:59:13,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:59:13,570 INFO L87 Difference]: Start difference. First operand 402 states and 807 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:14,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:14,638 INFO L93 Difference]: Finished difference Result 588 states and 1150 transitions. [2021-06-05 06:59:14,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:59:14,638 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 06:59:14,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:14,639 INFO L225 Difference]: With dead ends: 588 [2021-06-05 06:59:14,639 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 06:59:14,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1144.1ms TimeCoverageRelationStatistics Valid=238, Invalid=2212, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:59:14,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 06:59:14,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 389. [2021-06-05 06:59:14,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.0128865979381443) internal successors, (781), 388 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:14,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 781 transitions. [2021-06-05 06:59:14,646 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 781 transitions. Word has length 30 [2021-06-05 06:59:14,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:14,646 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 781 transitions. [2021-06-05 06:59:14,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:14,646 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 781 transitions. [2021-06-05 06:59:14,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:14,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:14,647 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:14,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 06:59:14,857 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:14,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:14,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2032502233, now seen corresponding path program 25 times [2021-06-05 06:59:14,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:14,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315533324] [2021-06-05 06:59:14,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:15,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:15,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315533324] [2021-06-05 06:59:15,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315533324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:15,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022440741] [2021-06-05 06:59:15,148 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:15,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:59:15,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:15,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 06:59:15,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:15,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:15,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:15,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:23 [2021-06-05 06:59:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:15,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022440741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:15,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:15,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-06-05 06:59:15,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532570327] [2021-06-05 06:59:15,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:59:15,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:15,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:59:15,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:59:15,537 INFO L87 Difference]: Start difference. First operand 389 states and 781 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:16,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:16,697 INFO L93 Difference]: Finished difference Result 589 states and 1149 transitions. [2021-06-05 06:59:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:59:16,697 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 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 30 [2021-06-05 06:59:16,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:16,699 INFO L225 Difference]: With dead ends: 589 [2021-06-05 06:59:16,699 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 06:59:16,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1027.8ms TimeCoverageRelationStatistics Valid=210, Invalid=2046, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:59:16,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 06:59:16,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 386. [2021-06-05 06:59:16,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.012987012987013) internal successors, (775), 385 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:16,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 775 transitions. [2021-06-05 06:59:16,704 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 775 transitions. Word has length 30 [2021-06-05 06:59:16,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:16,704 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 775 transitions. [2021-06-05 06:59:16,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:16,704 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 775 transitions. [2021-06-05 06:59:16,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:16,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:16,704 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:16,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 06:59:16,913 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:16,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:16,913 INFO L82 PathProgramCache]: Analyzing trace with hash -77043677, now seen corresponding path program 26 times [2021-06-05 06:59:16,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:16,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119205380] [2021-06-05 06:59:16,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:17,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:17,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119205380] [2021-06-05 06:59:17,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119205380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:17,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957638651] [2021-06-05 06:59:17,174 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:17,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:17,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:17,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:59:17,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:17,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:59:17,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:17,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:17,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:17,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-06-05 06:59:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:17,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957638651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:17,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:17,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 34 [2021-06-05 06:59:17,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165593652] [2021-06-05 06:59:17,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:59:17,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:17,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:59:17,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:59:17,669 INFO L87 Difference]: Start difference. First operand 386 states and 775 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:18,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:18,883 INFO L93 Difference]: Finished difference Result 608 states and 1180 transitions. [2021-06-05 06:59:18,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:59:18,883 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 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 30 [2021-06-05 06:59:18,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:18,884 INFO L225 Difference]: With dead ends: 608 [2021-06-05 06:59:18,884 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 06:59:18,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1169.8ms TimeCoverageRelationStatistics Valid=249, Invalid=2721, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:59:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 06:59:18,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 383. [2021-06-05 06:59:18,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.0157068062827226) internal successors, (770), 382 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:18,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 770 transitions. [2021-06-05 06:59:18,891 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 770 transitions. Word has length 30 [2021-06-05 06:59:18,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:18,891 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 770 transitions. [2021-06-05 06:59:18,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:18,891 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 770 transitions. [2021-06-05 06:59:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:18,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:18,892 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:19,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 06:59:19,093 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:19,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:19,093 INFO L82 PathProgramCache]: Analyzing trace with hash -560446937, now seen corresponding path program 27 times [2021-06-05 06:59:19,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:19,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47704136] [2021-06-05 06:59:19,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:19,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:19,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47704136] [2021-06-05 06:59:19,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47704136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:19,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065701702] [2021-06-05 06:59:19,364 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:19,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:59:19,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:19,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 06:59:19,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:19,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:59:19,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:19,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:19,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:19,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2021-06-05 06:59:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:19,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065701702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:19,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:19,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 06:59:19,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586027666] [2021-06-05 06:59:19,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:59:19,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:19,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:59:19,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1153, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:59:19,843 INFO L87 Difference]: Start difference. First operand 383 states and 770 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:21,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:21,133 INFO L93 Difference]: Finished difference Result 536 states and 1058 transitions. [2021-06-05 06:59:21,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:59:21,133 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 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 30 [2021-06-05 06:59:21,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:21,134 INFO L225 Difference]: With dead ends: 536 [2021-06-05 06:59:21,134 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 06:59:21,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 1319.8ms TimeCoverageRelationStatistics Valid=299, Invalid=3241, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:59:21,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 06:59:21,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 377. [2021-06-05 06:59:21,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.018617021276596) internal successors, (759), 376 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:21,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 759 transitions. [2021-06-05 06:59:21,139 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 759 transitions. Word has length 30 [2021-06-05 06:59:21,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:21,140 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 759 transitions. [2021-06-05 06:59:21,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:21,140 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 759 transitions. [2021-06-05 06:59:21,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:21,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:21,140 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:21,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 06:59:21,341 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:21,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:21,341 INFO L82 PathProgramCache]: Analyzing trace with hash 47899741, now seen corresponding path program 28 times [2021-06-05 06:59:21,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:21,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785373992] [2021-06-05 06:59:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:21,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:21,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785373992] [2021-06-05 06:59:21,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785373992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:21,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340534786] [2021-06-05 06:59:21,638 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:21,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:21,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:21,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:59:21,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:21,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 06:59:21,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:21,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:21,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:21,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 06:59:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:22,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340534786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:22,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:22,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:59:22,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977359226] [2021-06-05 06:59:22,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:59:22,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:22,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:59:22,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:59:22,051 INFO L87 Difference]: Start difference. First operand 377 states and 759 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:23,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:23,166 INFO L93 Difference]: Finished difference Result 544 states and 1071 transitions. [2021-06-05 06:59:23,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:59:23,166 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 06:59:23,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:23,168 INFO L225 Difference]: With dead ends: 544 [2021-06-05 06:59:23,168 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 06:59:23,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1197.1ms TimeCoverageRelationStatistics Valid=253, Invalid=2609, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:59:23,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 06:59:23,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 394. [2021-06-05 06:59:23,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.015267175572519) internal successors, (792), 393 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:23,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 792 transitions. [2021-06-05 06:59:23,174 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 792 transitions. Word has length 30 [2021-06-05 06:59:23,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:23,175 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 792 transitions. [2021-06-05 06:59:23,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:23,175 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 792 transitions. [2021-06-05 06:59:23,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:23,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:23,175 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:23,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:23,376 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:23,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:23,376 INFO L82 PathProgramCache]: Analyzing trace with hash 929965465, now seen corresponding path program 29 times [2021-06-05 06:59:23,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:23,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166435429] [2021-06-05 06:59:23,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:23,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:23,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:23,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166435429] [2021-06-05 06:59:23,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166435429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:23,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984231536] [2021-06-05 06:59:23,747 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:23,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:59:23,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:23,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:59:23,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:23,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:59:23,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:23,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:23,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:23,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 06:59:24,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:24,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984231536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:24,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:24,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:59:24,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553400455] [2021-06-05 06:59:24,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:59:24,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:24,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:59:24,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:59:24,231 INFO L87 Difference]: Start difference. First operand 394 states and 792 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:25,526 INFO L93 Difference]: Finished difference Result 488 states and 972 transitions. [2021-06-05 06:59:25,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:59:25,526 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 06:59:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:25,527 INFO L225 Difference]: With dead ends: 488 [2021-06-05 06:59:25,527 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 06:59:25,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1532.9ms TimeCoverageRelationStatistics Valid=284, Invalid=2686, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:59:25,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 06:59:25,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 392. [2021-06-05 06:59:25,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0153452685421995) internal successors, (788), 391 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 788 transitions. [2021-06-05 06:59:25,532 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 788 transitions. Word has length 30 [2021-06-05 06:59:25,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:25,532 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 788 transitions. [2021-06-05 06:59:25,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:25,532 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 788 transitions. [2021-06-05 06:59:25,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:25,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:25,532 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:25,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:25,733 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:25,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:25,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1896335113, now seen corresponding path program 30 times [2021-06-05 06:59:25,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:25,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612082128] [2021-06-05 06:59:25,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:26,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:26,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612082128] [2021-06-05 06:59:26,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612082128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:26,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152397562] [2021-06-05 06:59:26,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:26,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:59:26,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:26,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:59:26,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:26,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:59:26,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:26,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:26,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:26,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 06:59:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:26,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152397562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:26,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:26,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 06:59:26,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614995369] [2021-06-05 06:59:26,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:59:26,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:26,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:59:26,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:59:26,454 INFO L87 Difference]: Start difference. First operand 392 states and 788 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:27,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:27,450 INFO L93 Difference]: Finished difference Result 537 states and 1061 transitions. [2021-06-05 06:59:27,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:59:27,450 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 06:59:27,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:27,451 INFO L225 Difference]: With dead ends: 537 [2021-06-05 06:59:27,451 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 06:59:27,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1184.7ms TimeCoverageRelationStatistics Valid=236, Invalid=2314, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:59:27,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 06:59:27,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 391. [2021-06-05 06:59:27,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0153846153846153) internal successors, (786), 390 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:27,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 786 transitions. [2021-06-05 06:59:27,457 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 786 transitions. Word has length 30 [2021-06-05 06:59:27,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:27,457 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 786 transitions. [2021-06-05 06:59:27,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:27,457 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 786 transitions. [2021-06-05 06:59:27,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:27,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:27,458 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:27,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:27,661 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:27,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:27,661 INFO L82 PathProgramCache]: Analyzing trace with hash -377296315, now seen corresponding path program 31 times [2021-06-05 06:59:27,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:27,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534328956] [2021-06-05 06:59:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:28,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:28,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534328956] [2021-06-05 06:59:28,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534328956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:28,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946824138] [2021-06-05 06:59:28,004 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:28,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:59:28,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:28,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 06:59:28,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:28,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:28,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:28,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 06:59:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:28,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946824138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:28,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:28,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:59:28,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869306833] [2021-06-05 06:59:28,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:59:28,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:28,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:59:28,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:59:28,497 INFO L87 Difference]: Start difference. First operand 391 states and 786 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:29,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:29,603 INFO L93 Difference]: Finished difference Result 539 states and 1064 transitions. [2021-06-05 06:59:29,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:59:29,603 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 06:59:29,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:29,604 INFO L225 Difference]: With dead ends: 539 [2021-06-05 06:59:29,604 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 06:59:29,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1326.8ms TimeCoverageRelationStatistics Valid=245, Invalid=2511, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:59:29,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 06:59:29,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 381. [2021-06-05 06:59:29,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0157894736842104) internal successors, (766), 380 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:29,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 766 transitions. [2021-06-05 06:59:29,609 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 766 transitions. Word has length 30 [2021-06-05 06:59:29,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:29,609 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 766 transitions. [2021-06-05 06:59:29,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:29,609 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 766 transitions. [2021-06-05 06:59:29,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:29,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:29,610 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:29,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 06:59:29,822 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:29,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:29,822 INFO L82 PathProgramCache]: Analyzing trace with hash 2045308803, now seen corresponding path program 32 times [2021-06-05 06:59:29,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:29,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7392799] [2021-06-05 06:59:29,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:30,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:30,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7392799] [2021-06-05 06:59:30,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7392799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:30,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602820227] [2021-06-05 06:59:30,165 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:30,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:30,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:30,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:59:30,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:30,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:59:30,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:30,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:30,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:30,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 06:59:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:30,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602820227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:30,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:30,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 06:59:30,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677141232] [2021-06-05 06:59:30,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 06:59:30,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:30,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 06:59:30,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:59:30,680 INFO L87 Difference]: Start difference. First operand 381 states and 766 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:31,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:31,940 INFO L93 Difference]: Finished difference Result 571 states and 1121 transitions. [2021-06-05 06:59:31,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:59:31,940 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 06:59:31,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:31,941 INFO L225 Difference]: With dead ends: 571 [2021-06-05 06:59:31,941 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 06:59:31,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1453.0ms TimeCoverageRelationStatistics Valid=313, Invalid=3347, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:59:31,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 06:59:31,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 395. [2021-06-05 06:59:31,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.017766497461929) internal successors, (795), 394 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:31,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 795 transitions. [2021-06-05 06:59:31,946 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 795 transitions. Word has length 30 [2021-06-05 06:59:31,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:31,947 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 795 transitions. [2021-06-05 06:59:31,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:31,947 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 795 transitions. [2021-06-05 06:59:31,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:31,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:31,947 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:32,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:32,148 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:32,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:32,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1367592769, now seen corresponding path program 33 times [2021-06-05 06:59:32,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:32,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715353478] [2021-06-05 06:59:32,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:32,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:32,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715353478] [2021-06-05 06:59:32,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715353478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:32,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64584591] [2021-06-05 06:59:32,440 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:32,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:59:32,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:32,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:59:32,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:32,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:59:32,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:32,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:32,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:32,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 06:59:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:32,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64584591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:32,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:32,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:59:32,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042146592] [2021-06-05 06:59:32,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:59:32,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:32,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:59:32,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:59:32,846 INFO L87 Difference]: Start difference. First operand 395 states and 795 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:34,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:34,305 INFO L93 Difference]: Finished difference Result 505 states and 1000 transitions. [2021-06-05 06:59:34,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:59:34,305 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 06:59:34,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:34,306 INFO L225 Difference]: With dead ends: 505 [2021-06-05 06:59:34,307 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 06:59:34,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1533.2ms TimeCoverageRelationStatistics Valid=312, Invalid=2994, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:59:34,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 06:59:34,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 393. [2021-06-05 06:59:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.017857142857143) internal successors, (791), 392 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:34,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 791 transitions. [2021-06-05 06:59:34,312 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 791 transitions. Word has length 30 [2021-06-05 06:59:34,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:34,312 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 791 transitions. [2021-06-05 06:59:34,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:34,312 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 791 transitions. [2021-06-05 06:59:34,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:34,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:34,313 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:34,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:34,513 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:34,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:34,514 INFO L82 PathProgramCache]: Analyzing trace with hash 101073949, now seen corresponding path program 34 times [2021-06-05 06:59:34,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:34,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550704089] [2021-06-05 06:59:34,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:34,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:34,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550704089] [2021-06-05 06:59:34,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550704089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:34,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669379825] [2021-06-05 06:59:34,856 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:34,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:34,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:34,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:59:34,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:35,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 06:59:35,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:35,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:35,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:35,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 06:59:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:35,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669379825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:35,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:35,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 06:59:35,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113769226] [2021-06-05 06:59:35,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:59:35,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:35,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:59:35,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:59:35,360 INFO L87 Difference]: Start difference. First operand 393 states and 791 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:36,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:36,821 INFO L93 Difference]: Finished difference Result 576 states and 1136 transitions. [2021-06-05 06:59:36,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:59:36,822 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 06:59:36,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:36,823 INFO L225 Difference]: With dead ends: 576 [2021-06-05 06:59:36,823 INFO L226 Difference]: Without dead ends: 559 [2021-06-05 06:59:36,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1553.2ms TimeCoverageRelationStatistics Valid=290, Invalid=3016, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:59:36,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-05 06:59:36,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 402. [2021-06-05 06:59:36,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0124688279301743) internal successors, (807), 401 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:36,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 807 transitions. [2021-06-05 06:59:36,830 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 807 transitions. Word has length 30 [2021-06-05 06:59:36,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:36,830 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 807 transitions. [2021-06-05 06:59:36,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:36,831 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 807 transitions. [2021-06-05 06:59:36,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:36,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:36,831 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:37,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 06:59:37,032 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:37,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:37,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1620112747, now seen corresponding path program 35 times [2021-06-05 06:59:37,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:37,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179608538] [2021-06-05 06:59:37,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:37,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:37,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179608538] [2021-06-05 06:59:37,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179608538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:37,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965013610] [2021-06-05 06:59:37,318 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:37,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:59:37,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:37,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:59:37,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:37,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:59:37,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:37,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:37,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:37,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 06:59:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:37,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965013610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:37,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:37,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:59:37,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763476638] [2021-06-05 06:59:37,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:59:37,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:37,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:59:37,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:59:37,816 INFO L87 Difference]: Start difference. First operand 402 states and 807 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:39,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:39,170 INFO L93 Difference]: Finished difference Result 575 states and 1133 transitions. [2021-06-05 06:59:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:59:39,172 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 06:59:39,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:39,173 INFO L225 Difference]: With dead ends: 575 [2021-06-05 06:59:39,173 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 06:59:39,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1506.9ms TimeCoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:59:39,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 06:59:39,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 392. [2021-06-05 06:59:39,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.002557544757033) internal successors, (783), 391 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:39,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 783 transitions. [2021-06-05 06:59:39,180 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 783 transitions. Word has length 30 [2021-06-05 06:59:39,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:39,180 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 783 transitions. [2021-06-05 06:59:39,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:39,180 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 783 transitions. [2021-06-05 06:59:39,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:39,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:39,181 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:39,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 06:59:39,397 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:39,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:39,397 INFO L82 PathProgramCache]: Analyzing trace with hash 989692339, now seen corresponding path program 36 times [2021-06-05 06:59:39,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:39,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610256921] [2021-06-05 06:59:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:39,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:39,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610256921] [2021-06-05 06:59:39,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610256921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:39,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573142763] [2021-06-05 06:59:39,755 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:39,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 06:59:39,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:39,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:59:39,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:39,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:59:39,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:39,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:39,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:39,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 06:59:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:40,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573142763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:40,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:40,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:59:40,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787348239] [2021-06-05 06:59:40,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:59:40,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:40,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:59:40,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:59:40,191 INFO L87 Difference]: Start difference. First operand 392 states and 783 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:41,122 INFO L93 Difference]: Finished difference Result 516 states and 1009 transitions. [2021-06-05 06:59:41,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:59:41,122 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 06:59:41,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:41,123 INFO L225 Difference]: With dead ends: 516 [2021-06-05 06:59:41,123 INFO L226 Difference]: Without dead ends: 507 [2021-06-05 06:59:41,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1191.9ms TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:59:41,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-05 06:59:41,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 394. [2021-06-05 06:59:41,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.0) internal successors, (786), 393 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:41,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 786 transitions. [2021-06-05 06:59:41,129 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 786 transitions. Word has length 30 [2021-06-05 06:59:41,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:41,130 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 786 transitions. [2021-06-05 06:59:41,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:41,130 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 786 transitions. [2021-06-05 06:59:41,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:41,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:41,130 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:41,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 06:59:41,331 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:41,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:41,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1871758063, now seen corresponding path program 37 times [2021-06-05 06:59:41,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:41,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613898430] [2021-06-05 06:59:41,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:41,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:41,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613898430] [2021-06-05 06:59:41,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613898430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:41,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439599961] [2021-06-05 06:59:41,612 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:41,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:59:41,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:41,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 06:59:41,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:41,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:41,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:41,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 06:59:42,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:42,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439599961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:42,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:42,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:59:42,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362106241] [2021-06-05 06:59:42,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:59:42,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:42,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:59:42,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:59:42,028 INFO L87 Difference]: Start difference. First operand 394 states and 786 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:43,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:43,140 INFO L93 Difference]: Finished difference Result 448 states and 885 transitions. [2021-06-05 06:59:43,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:59:43,140 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 06:59:43,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:43,141 INFO L225 Difference]: With dead ends: 448 [2021-06-05 06:59:43,141 INFO L226 Difference]: Without dead ends: 425 [2021-06-05 06:59:43,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1221.6ms TimeCoverageRelationStatistics Valid=234, Invalid=2216, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:59:43,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-06-05 06:59:43,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 384. [2021-06-05 06:59:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.0130548302872064) internal successors, (771), 383 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:43,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 771 transitions. [2021-06-05 06:59:43,145 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 771 transitions. Word has length 30 [2021-06-05 06:59:43,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:43,145 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 771 transitions. [2021-06-05 06:59:43,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:43,146 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 771 transitions. [2021-06-05 06:59:43,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:43,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:43,146 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:43,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:43,347 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:43,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:43,347 INFO L82 PathProgramCache]: Analyzing trace with hash 993750413, now seen corresponding path program 38 times [2021-06-05 06:59:43,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:43,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094164072] [2021-06-05 06:59:43,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:43,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:43,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094164072] [2021-06-05 06:59:43,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094164072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:43,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582730586] [2021-06-05 06:59:43,604 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:43,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:43,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:43,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 06:59:43,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:43,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 06:59:43,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:43,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:43,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:43,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:25 [2021-06-05 06:59:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:44,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582730586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:44,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:44,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 06:59:44,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113349281] [2021-06-05 06:59:44,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:59:44,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:44,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:59:44,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:59:44,009 INFO L87 Difference]: Start difference. First operand 384 states and 771 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:44,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:44,875 INFO L93 Difference]: Finished difference Result 518 states and 1023 transitions. [2021-06-05 06:59:44,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:59:44,875 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 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 30 [2021-06-05 06:59:44,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:44,876 INFO L225 Difference]: With dead ends: 518 [2021-06-05 06:59:44,876 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 06:59:44,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1019.2ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:59:44,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 06:59:44,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 381. [2021-06-05 06:59:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0157894736842104) internal successors, (766), 380 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:44,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 766 transitions. [2021-06-05 06:59:44,883 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 766 transitions. Word has length 30 [2021-06-05 06:59:44,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:44,883 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 766 transitions. [2021-06-05 06:59:44,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:44,883 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 766 transitions. [2021-06-05 06:59:44,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:44,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:44,884 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:45,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:45,089 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:45,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:45,089 INFO L82 PathProgramCache]: Analyzing trace with hash 259084061, now seen corresponding path program 39 times [2021-06-05 06:59:45,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:45,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991468995] [2021-06-05 06:59:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:45,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:45,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991468995] [2021-06-05 06:59:45,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991468995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:45,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290358594] [2021-06-05 06:59:45,427 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:45,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:59:45,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:45,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:59:45,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:45,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:59:45,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:45,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:45,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:45,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 06:59:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:45,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290358594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:45,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:45,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:59:45,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604563775] [2021-06-05 06:59:45,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:59:45,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:45,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:59:45,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:59:45,861 INFO L87 Difference]: Start difference. First operand 381 states and 766 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:46,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:46,913 INFO L93 Difference]: Finished difference Result 530 states and 1036 transitions. [2021-06-05 06:59:46,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:59:46,913 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 06:59:46,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:46,914 INFO L225 Difference]: With dead ends: 530 [2021-06-05 06:59:46,914 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 06:59:46,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1127.4ms TimeCoverageRelationStatistics Valid=209, Invalid=2241, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:59:46,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 06:59:46,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 395. [2021-06-05 06:59:46,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.010152284263959) internal successors, (792), 394 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:46,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 792 transitions. [2021-06-05 06:59:46,919 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 792 transitions. Word has length 30 [2021-06-05 06:59:46,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:46,919 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 792 transitions. [2021-06-05 06:59:46,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:46,920 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 792 transitions. [2021-06-05 06:59:46,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:46,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:46,920 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:47,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:47,126 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:47,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:47,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1141149785, now seen corresponding path program 40 times [2021-06-05 06:59:47,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:47,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705431393] [2021-06-05 06:59:47,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:47,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:47,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705431393] [2021-06-05 06:59:47,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705431393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:47,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607196042] [2021-06-05 06:59:47,425 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:47,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:47,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:47,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:59:47,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:47,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 06:59:47,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:47,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:47,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:47,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 06:59:47,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:47,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607196042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:47,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:47,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:59:47,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266931874] [2021-06-05 06:59:47,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:59:47,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:47,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:59:47,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:59:47,837 INFO L87 Difference]: Start difference. First operand 395 states and 792 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:49,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:49,000 INFO L93 Difference]: Finished difference Result 464 states and 917 transitions. [2021-06-05 06:59:49,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:59:49,000 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 06:59:49,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:49,001 INFO L225 Difference]: With dead ends: 464 [2021-06-05 06:59:49,001 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 06:59:49,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1276.0ms TimeCoverageRelationStatistics Valid=238, Invalid=2312, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:59:49,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 06:59:49,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 393. [2021-06-05 06:59:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.010204081632653) internal successors, (788), 392 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:49,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 788 transitions. [2021-06-05 06:59:49,005 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 788 transitions. Word has length 30 [2021-06-05 06:59:49,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:49,005 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 788 transitions. [2021-06-05 06:59:49,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:49,006 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 788 transitions. [2021-06-05 06:59:49,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:49,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:49,006 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:49,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:49,207 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:49,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:49,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1685150793, now seen corresponding path program 41 times [2021-06-05 06:59:49,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:49,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529442691] [2021-06-05 06:59:49,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:49,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:49,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529442691] [2021-06-05 06:59:49,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529442691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:49,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131434266] [2021-06-05 06:59:49,485 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 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 [2021-06-05 06:59:49,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:49,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:49,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:59:49,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:49,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:59:49,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:49,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:49,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:49,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 06:59:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:49,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131434266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:49,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:49,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 06:59:49,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766742302] [2021-06-05 06:59:49,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:59:49,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:49,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:59:49,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:59:49,859 INFO L87 Difference]: Start difference. First operand 393 states and 788 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:50,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:50,848 INFO L93 Difference]: Finished difference Result 537 states and 1056 transitions. [2021-06-05 06:59:50,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:59:50,848 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 06:59:50,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:50,849 INFO L225 Difference]: With dead ends: 537 [2021-06-05 06:59:50,849 INFO L226 Difference]: Without dead ends: 492 [2021-06-05 06:59:50,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1023.1ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:59:50,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-05 06:59:50,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 385. [2021-06-05 06:59:50,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.0104166666666665) internal successors, (772), 384 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:50,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 772 transitions. [2021-06-05 06:59:50,853 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 772 transitions. Word has length 30 [2021-06-05 06:59:50,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:50,853 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 772 transitions. [2021-06-05 06:59:50,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:50,853 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 772 transitions. [2021-06-05 06:59:50,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:50,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:50,857 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:51,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 06:59:51,058 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:51,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:51,058 INFO L82 PathProgramCache]: Analyzing trace with hash 263142135, now seen corresponding path program 42 times [2021-06-05 06:59:51,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:51,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849322318] [2021-06-05 06:59:51,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:51,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:51,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849322318] [2021-06-05 06:59:51,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849322318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:51,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241924770] [2021-06-05 06:59:51,300 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 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 [2021-06-05 06:59:51,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 06:59:51,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:51,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:59:51,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:51,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:59:51,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:51,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:51,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:51,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:25 [2021-06-05 06:59:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:51,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241924770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:51,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:51,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 06:59:51,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699672418] [2021-06-05 06:59:51,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:59:51,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:51,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:59:51,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:59:51,699 INFO L87 Difference]: Start difference. First operand 385 states and 772 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:52,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:52,490 INFO L93 Difference]: Finished difference Result 520 states and 1025 transitions. [2021-06-05 06:59:52,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:59:52,491 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 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 30 [2021-06-05 06:59:52,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:52,491 INFO L225 Difference]: With dead ends: 520 [2021-06-05 06:59:52,491 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 06:59:52,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 907.1ms TimeCoverageRelationStatistics Valid=191, Invalid=1879, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:59:52,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 06:59:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 383. [2021-06-05 06:59:52,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.0104712041884816) internal successors, (768), 382 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 768 transitions. [2021-06-05 06:59:52,498 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 768 transitions. Word has length 30 [2021-06-05 06:59:52,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:52,498 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 768 transitions. [2021-06-05 06:59:52,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:52,498 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 768 transitions. [2021-06-05 06:59:52,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:52,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:52,499 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:52,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:52,713 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:52,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:52,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2076366605, now seen corresponding path program 43 times [2021-06-05 06:59:52,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:52,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736722743] [2021-06-05 06:59:52,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:53,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:53,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736722743] [2021-06-05 06:59:53,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736722743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:53,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357370521] [2021-06-05 06:59:53,026 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 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 [2021-06-05 06:59:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:53,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:59:53,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:53,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:59:53,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:53,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:53,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:53,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:25 [2021-06-05 06:59:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:53,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357370521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:53,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:53,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 06:59:53,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426767804] [2021-06-05 06:59:53,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 06:59:53,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:53,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 06:59:53,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1021, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:59:53,588 INFO L87 Difference]: Start difference. First operand 383 states and 768 transitions. Second operand has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:54,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:54,457 INFO L93 Difference]: Finished difference Result 518 states and 1021 transitions. [2021-06-05 06:59:54,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:59:54,457 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 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 30 [2021-06-05 06:59:54,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:54,458 INFO L225 Difference]: With dead ends: 518 [2021-06-05 06:59:54,458 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 06:59:54,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1162.1ms TimeCoverageRelationStatistics Valid=201, Invalid=2151, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:59:54,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 06:59:54,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 380. [2021-06-05 06:59:54,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.0131926121372032) internal successors, (763), 379 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:54,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 763 transitions. [2021-06-05 06:59:54,463 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 763 transitions. Word has length 30 [2021-06-05 06:59:54,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:54,463 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 763 transitions. [2021-06-05 06:59:54,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:54,463 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 763 transitions. [2021-06-05 06:59:54,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:54,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:54,464 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:54,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 06:59:54,664 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:54,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:54,665 INFO L82 PathProgramCache]: Analyzing trace with hash 283371545, now seen corresponding path program 44 times [2021-06-05 06:59:54,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:54,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200852379] [2021-06-05 06:59:54,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:54,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:54,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200852379] [2021-06-05 06:59:54,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200852379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:54,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688386847] [2021-06-05 06:59:54,947 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 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 [2021-06-05 06:59:54,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:54,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:54,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:59:54,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:55,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:59:55,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:55,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:55,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:55,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 06:59:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:55,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688386847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:55,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:55,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-06-05 06:59:55,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633835970] [2021-06-05 06:59:55,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:59:55,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:55,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:59:55,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:59:55,268 INFO L87 Difference]: Start difference. First operand 380 states and 763 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:56,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:56,179 INFO L93 Difference]: Finished difference Result 546 states and 1072 transitions. [2021-06-05 06:59:56,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:59:56,179 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 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 30 [2021-06-05 06:59:56,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:56,180 INFO L225 Difference]: With dead ends: 546 [2021-06-05 06:59:56,180 INFO L226 Difference]: Without dead ends: 537 [2021-06-05 06:59:56,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 957.3ms TimeCoverageRelationStatistics Valid=237, Invalid=2115, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:59:56,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-06-05 06:59:56,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 404. [2021-06-05 06:59:56,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 403 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 809 transitions. [2021-06-05 06:59:56,186 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 809 transitions. Word has length 30 [2021-06-05 06:59:56,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:56,186 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 809 transitions. [2021-06-05 06:59:56,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:56,186 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 809 transitions. [2021-06-05 06:59:56,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:56,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:56,186 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:56,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 06:59:56,387 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:56,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:56,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1165437269, now seen corresponding path program 45 times [2021-06-05 06:59:56,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:56,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747538932] [2021-06-05 06:59:56,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:56,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:56,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747538932] [2021-06-05 06:59:56,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747538932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:56,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642147339] [2021-06-05 06:59:56,623 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 [2021-06-05 06:59:56,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:59:56,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:56,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:59:56,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:56,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:59:56,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:56,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:56,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:56,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 06:59:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:56,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642147339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:56,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:56,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-06-05 06:59:56,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038418118] [2021-06-05 06:59:56,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:59:56,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:56,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:59:56,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:59:56,878 INFO L87 Difference]: Start difference. First operand 404 states and 809 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:57,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:57,839 INFO L93 Difference]: Finished difference Result 500 states and 993 transitions. [2021-06-05 06:59:57,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:59:57,839 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 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 30 [2021-06-05 06:59:57,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:57,840 INFO L225 Difference]: With dead ends: 500 [2021-06-05 06:59:57,840 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 06:59:57,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 979.7ms TimeCoverageRelationStatistics Valid=238, Invalid=1832, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:59:57,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 06:59:57,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 402. [2021-06-05 06:59:57,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2021-06-05 06:59:57,845 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2021-06-05 06:59:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:57,845 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2021-06-05 06:59:57,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:57,845 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2021-06-05 06:59:57,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:57,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:57,845 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:58,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:58,046 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:58,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:58,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1660863309, now seen corresponding path program 46 times [2021-06-05 06:59:58,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:58,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233580390] [2021-06-05 06:59:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:58,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:58,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233580390] [2021-06-05 06:59:58,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233580390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:58,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780763059] [2021-06-05 06:59:58,276 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 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 [2021-06-05 06:59:58,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:58,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:58,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:59:58,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:58,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 06:59:58,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:58,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:58,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:58,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 06:59:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:58,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780763059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:58,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:58,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-05 06:59:58,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979355010] [2021-06-05 06:59:58,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:59:58,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:58,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:59:58,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:59:58,490 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:59,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:59,284 INFO L93 Difference]: Finished difference Result 542 states and 1067 transitions. [2021-06-05 06:59:59,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:59:59,284 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 30 [2021-06-05 06:59:59,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:59,285 INFO L225 Difference]: With dead ends: 542 [2021-06-05 06:59:59,285 INFO L226 Difference]: Without dead ends: 525 [2021-06-05 06:59:59,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 813.7ms TimeCoverageRelationStatistics Valid=206, Invalid=1686, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:59:59,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-05 06:59:59,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 401. [2021-06-05 06:59:59,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0075) internal successors, (803), 400 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:59,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 803 transitions. [2021-06-05 06:59:59,290 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 803 transitions. Word has length 30 [2021-06-05 06:59:59,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:59,290 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 803 transitions. [2021-06-05 06:59:59,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:59,290 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 803 transitions. [2021-06-05 06:59:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:59,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:59,290 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:59,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 06:59:59,491 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:59,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:59,492 INFO L82 PathProgramCache]: Analyzing trace with hash -141824511, now seen corresponding path program 47 times [2021-06-05 06:59:59,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:59,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477732474] [2021-06-05 06:59:59,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:59,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:59,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477732474] [2021-06-05 06:59:59,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477732474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:59,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127098159] [2021-06-05 06:59:59,715 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 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 [2021-06-05 06:59:59,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:59:59,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:59,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:59:59,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:59,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 06:59:59,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:59,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:59,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:59,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 06:59:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:59,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127098159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:59,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:59,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-06-05 06:59:59,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321106143] [2021-06-05 06:59:59,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:59:59,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:59,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:59:59,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:59:59,945 INFO L87 Difference]: Start difference. First operand 401 states and 803 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:00,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:00,773 INFO L93 Difference]: Finished difference Result 544 states and 1070 transitions. [2021-06-05 07:00:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:00:00,773 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 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 30 [2021-06-05 07:00:00,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:00,774 INFO L225 Difference]: With dead ends: 544 [2021-06-05 07:00:00,774 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 07:00:00,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 837.7ms TimeCoverageRelationStatistics Valid=215, Invalid=1855, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:00:00,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 07:00:00,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 388. [2021-06-05 07:00:00,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:00,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2021-06-05 07:00:00,778 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2021-06-05 07:00:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:00,778 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2021-06-05 07:00:00,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2021-06-05 07:00:00,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:00,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:00,779 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:00,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:00,979 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:00,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:00,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1553581585, now seen corresponding path program 48 times [2021-06-05 07:00:00,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:00,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972660148] [2021-06-05 07:00:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:01,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:01,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972660148] [2021-06-05 07:00:01,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972660148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:01,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643443618] [2021-06-05 07:00:01,240 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 [2021-06-05 07:00:01,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:00:01,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:01,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:00:01,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:01,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:00:01,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:01,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:01,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:01,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:00:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:01,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643443618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:01,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:01,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 07:00:01,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882423983] [2021-06-05 07:00:01,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:00:01,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:01,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:00:01,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:00:01,516 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:02,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:02,520 INFO L93 Difference]: Finished difference Result 557 states and 1092 transitions. [2021-06-05 07:00:02,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:00:02,522 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 30 [2021-06-05 07:00:02,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:02,523 INFO L225 Difference]: With dead ends: 557 [2021-06-05 07:00:02,523 INFO L226 Difference]: Without dead ends: 548 [2021-06-05 07:00:02,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 984.3ms TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:00:02,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-06-05 07:00:02,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 405. [2021-06-05 07:00:02,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.007425742574257) internal successors, (811), 404 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:02,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 811 transitions. [2021-06-05 07:00:02,528 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 811 transitions. Word has length 30 [2021-06-05 07:00:02,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:02,528 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 811 transitions. [2021-06-05 07:00:02,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:02,528 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 811 transitions. [2021-06-05 07:00:02,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:02,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:02,529 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:02,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 07:00:02,757 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:02,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:02,757 INFO L82 PathProgramCache]: Analyzing trace with hash -671515861, now seen corresponding path program 49 times [2021-06-05 07:00:02,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:02,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948518644] [2021-06-05 07:00:02,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:03,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:03,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948518644] [2021-06-05 07:00:03,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948518644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:03,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408528676] [2021-06-05 07:00:03,058 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:03,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:00:03,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:03,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:00:03,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:03,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:03,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:03,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:00:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:03,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408528676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:03,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:03,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 07:00:03,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278503323] [2021-06-05 07:00:03,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:00:03,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:03,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:00:03,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:00:03,299 INFO L87 Difference]: Start difference. First operand 405 states and 811 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:04,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:04,315 INFO L93 Difference]: Finished difference Result 501 states and 995 transitions. [2021-06-05 07:00:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:00:04,315 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 30 [2021-06-05 07:00:04,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:04,316 INFO L225 Difference]: With dead ends: 501 [2021-06-05 07:00:04,316 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 07:00:04,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 987.9ms TimeCoverageRelationStatistics Valid=233, Invalid=1747, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:00:04,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 07:00:04,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 403. [2021-06-05 07:00:04,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0074626865671643) internal successors, (807), 402 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 807 transitions. [2021-06-05 07:00:04,320 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 807 transitions. Word has length 30 [2021-06-05 07:00:04,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:04,321 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 807 transitions. [2021-06-05 07:00:04,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:04,321 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 807 transitions. [2021-06-05 07:00:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:04,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:04,321 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:04,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:04,522 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:04,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:04,522 INFO L82 PathProgramCache]: Analyzing trace with hash 797150857, now seen corresponding path program 50 times [2021-06-05 07:00:04,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:04,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668907624] [2021-06-05 07:00:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:04,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:04,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:04,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668907624] [2021-06-05 07:00:04,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668907624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:04,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577577877] [2021-06-05 07:00:04,760 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 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 [2021-06-05 07:00:04,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:04,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:04,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:00:04,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:04,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:00:04,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:04,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:04,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:04,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:00:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:05,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577577877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:05,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:05,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 24 [2021-06-05 07:00:05,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471005319] [2021-06-05 07:00:05,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:00:05,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:05,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:00:05,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:00:05,003 INFO L87 Difference]: Start difference. First operand 403 states and 807 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:05,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:05,879 INFO L93 Difference]: Finished difference Result 550 states and 1082 transitions. [2021-06-05 07:00:05,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:00:05,880 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 30 [2021-06-05 07:00:05,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:05,881 INFO L225 Difference]: With dead ends: 550 [2021-06-05 07:00:05,881 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 07:00:05,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 868.3ms TimeCoverageRelationStatistics Valid=218, Invalid=1674, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:00:05,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 07:00:05,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 402. [2021-06-05 07:00:05,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2021-06-05 07:00:05,886 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2021-06-05 07:00:05,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:05,886 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2021-06-05 07:00:05,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:05,886 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2021-06-05 07:00:05,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:05,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:05,887 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:06,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 07:00:06,093 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:06,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:06,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1978777641, now seen corresponding path program 51 times [2021-06-05 07:00:06,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:06,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121074565] [2021-06-05 07:00:06,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:06,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:06,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121074565] [2021-06-05 07:00:06,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121074565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:06,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905530085] [2021-06-05 07:00:06,324 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:06,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:00:06,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:06,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:00:06,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:06,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:00:06,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:06,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:06,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:06,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:00:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:06,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905530085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:06,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:06,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 07:00:06,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136322866] [2021-06-05 07:00:06,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:00:06,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:06,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:00:06,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:00:06,556 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:07,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:07,522 INFO L93 Difference]: Finished difference Result 547 states and 1074 transitions. [2021-06-05 07:00:07,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:00:07,522 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 30 [2021-06-05 07:00:07,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:07,523 INFO L225 Difference]: With dead ends: 547 [2021-06-05 07:00:07,523 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 07:00:07,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 915.5ms TimeCoverageRelationStatistics Valid=203, Invalid=1689, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:00:07,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 07:00:07,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 389. [2021-06-05 07:00:07,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.0103092783505154) internal successors, (780), 388 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 780 transitions. [2021-06-05 07:00:07,527 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 780 transitions. Word has length 30 [2021-06-05 07:00:07,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:07,527 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 780 transitions. [2021-06-05 07:00:07,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 780 transitions. [2021-06-05 07:00:07,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:07,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:07,528 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:07,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:07,729 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:07,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:07,729 INFO L82 PathProgramCache]: Analyzing trace with hash 443827477, now seen corresponding path program 52 times [2021-06-05 07:00:07,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:07,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769566147] [2021-06-05 07:00:07,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:07,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:07,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769566147] [2021-06-05 07:00:07,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769566147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:07,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537059126] [2021-06-05 07:00:07,981 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 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 [2021-06-05 07:00:08,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:08,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:08,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:00:08,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:08,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:00:08,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:08,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:08,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:08,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:00:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:08,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537059126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:08,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:08,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:00:08,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859895066] [2021-06-05 07:00:08,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:00:08,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:08,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:00:08,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:00:08,282 INFO L87 Difference]: Start difference. First operand 389 states and 780 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:09,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:09,597 INFO L93 Difference]: Finished difference Result 580 states and 1133 transitions. [2021-06-05 07:00:09,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:00:09,597 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:00:09,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:09,598 INFO L225 Difference]: With dead ends: 580 [2021-06-05 07:00:09,598 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 07:00:09,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1160.6ms TimeCoverageRelationStatistics Valid=241, Invalid=2209, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:00:09,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 07:00:09,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 403. [2021-06-05 07:00:09,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.012437810945274) internal successors, (809), 402 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:09,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 809 transitions. [2021-06-05 07:00:09,604 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 809 transitions. Word has length 30 [2021-06-05 07:00:09,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:09,604 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 809 transitions. [2021-06-05 07:00:09,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:09,604 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 809 transitions. [2021-06-05 07:00:09,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:09,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:09,605 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:09,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 07:00:09,806 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:09,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:09,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1325893201, now seen corresponding path program 53 times [2021-06-05 07:00:09,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:09,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943608266] [2021-06-05 07:00:09,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:10,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:10,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943608266] [2021-06-05 07:00:10,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943608266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:10,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849677380] [2021-06-05 07:00:10,070 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 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 [2021-06-05 07:00:10,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:00:10,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:10,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:00:10,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:10,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:00:10,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:10,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:10,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:10,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:00:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:10,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849677380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:10,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:10,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:00:10,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797972619] [2021-06-05 07:00:10,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:00:10,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:10,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:00:10,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:00:10,344 INFO L87 Difference]: Start difference. First operand 403 states and 809 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:11,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:11,780 INFO L93 Difference]: Finished difference Result 516 states and 1018 transitions. [2021-06-05 07:00:11,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:00:11,780 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:00:11,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:11,781 INFO L225 Difference]: With dead ends: 516 [2021-06-05 07:00:11,781 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 07:00:11,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1247.8ms TimeCoverageRelationStatistics Valid=279, Invalid=2271, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:00:11,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 07:00:11,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 401. [2021-06-05 07:00:11,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0125) internal successors, (805), 400 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:11,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 805 transitions. [2021-06-05 07:00:11,786 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 805 transitions. Word has length 30 [2021-06-05 07:00:11,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:11,786 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 805 transitions. [2021-06-05 07:00:11,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:11,786 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 805 transitions. [2021-06-05 07:00:11,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:11,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:11,787 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:11,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:11,989 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:11,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:11,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1500407377, now seen corresponding path program 54 times [2021-06-05 07:00:11,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:11,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310169990] [2021-06-05 07:00:11,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:12,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:12,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310169990] [2021-06-05 07:00:12,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310169990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:12,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882339312] [2021-06-05 07:00:12,226 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 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 [2021-06-05 07:00:12,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:00:12,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:12,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:00:12,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:12,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:00:12,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:12,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:12,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:12,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:00:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:12,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882339312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:12,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:12,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 07:00:12,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402033585] [2021-06-05 07:00:12,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:00:12,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:12,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:00:12,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:00:12,461 INFO L87 Difference]: Start difference. First operand 401 states and 805 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:13,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:13,839 INFO L93 Difference]: Finished difference Result 578 states and 1134 transitions. [2021-06-05 07:00:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:00:13,840 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 30 [2021-06-05 07:00:13,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:13,840 INFO L225 Difference]: With dead ends: 578 [2021-06-05 07:00:13,840 INFO L226 Difference]: Without dead ends: 561 [2021-06-05 07:00:13,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 1287.5ms TimeCoverageRelationStatistics Valid=278, Invalid=2584, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:00:13,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-05 07:00:13,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 410. [2021-06-05 07:00:13,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.0073349633251834) internal successors, (821), 409 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:13,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 821 transitions. [2021-06-05 07:00:13,845 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 821 transitions. Word has length 30 [2021-06-05 07:00:13,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:13,845 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 821 transitions. [2021-06-05 07:00:13,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:13,845 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 821 transitions. [2021-06-05 07:00:13,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:13,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:13,846 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:14,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 07:00:14,047 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:14,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:14,047 INFO L82 PathProgramCache]: Analyzing trace with hash 18631421, now seen corresponding path program 55 times [2021-06-05 07:00:14,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:14,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928103804] [2021-06-05 07:00:14,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:14,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:14,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928103804] [2021-06-05 07:00:14,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928103804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:14,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333563025] [2021-06-05 07:00:14,341 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 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 [2021-06-05 07:00:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:14,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:00:14,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:14,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:00:14,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:14,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:14,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:14,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:00:14,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:14,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333563025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:14,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:14,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:00:14,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534924178] [2021-06-05 07:00:14,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:00:14,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:14,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:00:14,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:00:14,654 INFO L87 Difference]: Start difference. First operand 410 states and 821 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:16,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:16,113 INFO L93 Difference]: Finished difference Result 577 states and 1131 transitions. [2021-06-05 07:00:16,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:00:16,113 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:00:16,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:16,114 INFO L225 Difference]: With dead ends: 577 [2021-06-05 07:00:16,114 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 07:00:16,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1364.4ms TimeCoverageRelationStatistics Valid=293, Invalid=2787, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:00:16,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 07:00:16,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 400. [2021-06-05 07:00:16,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.9974937343358397) internal successors, (797), 399 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:16,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 797 transitions. [2021-06-05 07:00:16,120 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 797 transitions. Word has length 30 [2021-06-05 07:00:16,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:16,120 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 797 transitions. [2021-06-05 07:00:16,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:16,121 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 797 transitions. [2021-06-05 07:00:16,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:16,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:16,121 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:16,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 07:00:16,337 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:16,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:16,337 INFO L82 PathProgramCache]: Analyzing trace with hash -611788987, now seen corresponding path program 56 times [2021-06-05 07:00:16,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:16,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233347791] [2021-06-05 07:00:16,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:16,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:16,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233347791] [2021-06-05 07:00:16,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233347791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:16,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556322804] [2021-06-05 07:00:16,582 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 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 [2021-06-05 07:00:16,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:16,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:16,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:00:16,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:16,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:00:16,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:16,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:16,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:16,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:00:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:16,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556322804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:16,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:16,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:00:16,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479676376] [2021-06-05 07:00:16,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:00:16,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:16,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:00:16,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:00:16,876 INFO L87 Difference]: Start difference. First operand 400 states and 797 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:17,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:17,750 INFO L93 Difference]: Finished difference Result 533 states and 1038 transitions. [2021-06-05 07:00:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:00:17,750 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:00:17,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:17,751 INFO L225 Difference]: With dead ends: 533 [2021-06-05 07:00:17,751 INFO L226 Difference]: Without dead ends: 524 [2021-06-05 07:00:17,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 871.6ms TimeCoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:00:17,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-05 07:00:17,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 402. [2021-06-05 07:00:17,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.9950124688279303) internal successors, (800), 401 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:17,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 800 transitions. [2021-06-05 07:00:17,755 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 800 transitions. Word has length 30 [2021-06-05 07:00:17,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:17,755 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 800 transitions. [2021-06-05 07:00:17,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:17,755 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 800 transitions. [2021-06-05 07:00:17,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:17,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:17,755 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:17,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 07:00:17,956 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:17,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:17,956 INFO L82 PathProgramCache]: Analyzing trace with hash 270276737, now seen corresponding path program 57 times [2021-06-05 07:00:17,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:17,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700752668] [2021-06-05 07:00:17,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:18,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:18,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700752668] [2021-06-05 07:00:18,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700752668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:18,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904613324] [2021-06-05 07:00:18,191 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 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 [2021-06-05 07:00:18,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:00:18,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:18,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:00:18,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:18,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:00:18,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:18,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:18,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:18,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:00:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:18,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904613324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:18,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:18,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:00:18,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052168155] [2021-06-05 07:00:18,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:00:18,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:18,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:00:18,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:00:18,479 INFO L87 Difference]: Start difference. First operand 402 states and 800 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:19,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:19,553 INFO L93 Difference]: Finished difference Result 477 states and 941 transitions. [2021-06-05 07:00:19,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:00:19,553 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:00:19,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:19,554 INFO L225 Difference]: With dead ends: 477 [2021-06-05 07:00:19,554 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 07:00:19,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1035.0ms TimeCoverageRelationStatistics Valid=199, Invalid=1693, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:00:19,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 07:00:19,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 392. [2021-06-05 07:00:19,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0076726342710995) internal successors, (785), 391 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:19,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 785 transitions. [2021-06-05 07:00:19,558 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 785 transitions. Word has length 30 [2021-06-05 07:00:19,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:19,558 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 785 transitions. [2021-06-05 07:00:19,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:19,558 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 785 transitions. [2021-06-05 07:00:19,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:19,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:19,558 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:19,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:19,759 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:19,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:19,760 INFO L82 PathProgramCache]: Analyzing trace with hash -607730913, now seen corresponding path program 58 times [2021-06-05 07:00:19,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:19,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527523572] [2021-06-05 07:00:19,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:20,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:20,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527523572] [2021-06-05 07:00:20,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527523572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:20,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478783093] [2021-06-05 07:00:20,105 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 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 [2021-06-05 07:00:20,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:20,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:20,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:00:20,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:20,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:00:20,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:20,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:20,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:20,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:00:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:20,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478783093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:20,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:20,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:00:20,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870554626] [2021-06-05 07:00:20,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:00:20,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:20,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:00:20,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:00:20,388 INFO L87 Difference]: Start difference. First operand 392 states and 785 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:21,307 INFO L93 Difference]: Finished difference Result 526 states and 1033 transitions. [2021-06-05 07:00:21,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:00:21,307 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:00:21,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:21,308 INFO L225 Difference]: With dead ends: 526 [2021-06-05 07:00:21,308 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 07:00:21,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 997.7ms TimeCoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:00:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 07:00:21,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 388. [2021-06-05 07:00:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:21,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2021-06-05 07:00:21,312 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2021-06-05 07:00:21,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:21,312 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2021-06-05 07:00:21,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:21,312 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2021-06-05 07:00:21,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:21,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:21,313 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:21,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:21,513 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:21,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:21,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1615090749, now seen corresponding path program 59 times [2021-06-05 07:00:21,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:21,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290566453] [2021-06-05 07:00:21,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:21,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:21,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290566453] [2021-06-05 07:00:21,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290566453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:21,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936968556] [2021-06-05 07:00:21,800 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 [2021-06-05 07:00:21,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:00:21,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:21,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:00:21,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:21,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:00:21,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:21,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:21,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:21,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:00:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:22,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936968556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:22,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:22,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:00:22,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856223497] [2021-06-05 07:00:22,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:22,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:22,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:22,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:22,272 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:23,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:23,222 INFO L93 Difference]: Finished difference Result 567 states and 1110 transitions. [2021-06-05 07:00:23,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:00:23,222 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:00:23,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:23,223 INFO L225 Difference]: With dead ends: 567 [2021-06-05 07:00:23,223 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 07:00:23,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1165.2ms TimeCoverageRelationStatistics Valid=260, Invalid=2496, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:00:23,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 07:00:23,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 406. [2021-06-05 07:00:23,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0074074074074075) internal successors, (813), 405 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:23,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 813 transitions. [2021-06-05 07:00:23,227 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 813 transitions. Word has length 30 [2021-06-05 07:00:23,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:23,227 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 813 transitions. [2021-06-05 07:00:23,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:23,227 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 813 transitions. [2021-06-05 07:00:23,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:23,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:23,228 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:23,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:23,428 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:23,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:23,429 INFO L82 PathProgramCache]: Analyzing trace with hash -733025025, now seen corresponding path program 60 times [2021-06-05 07:00:23,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:23,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737532109] [2021-06-05 07:00:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:23,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:23,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737532109] [2021-06-05 07:00:23,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737532109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:23,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598086310] [2021-06-05 07:00:23,689 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 [2021-06-05 07:00:23,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:00:23,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:23,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:00:23,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:23,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:00:23,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:23,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:23,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:23,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:00:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:24,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598086310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:24,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:24,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:00:24,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053483806] [2021-06-05 07:00:24,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:24,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:24,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:24,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:24,129 INFO L87 Difference]: Start difference. First operand 406 states and 813 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:25,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:25,282 INFO L93 Difference]: Finished difference Result 511 states and 1013 transitions. [2021-06-05 07:00:25,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:00:25,283 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:00:25,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:25,284 INFO L225 Difference]: With dead ends: 511 [2021-06-05 07:00:25,284 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 07:00:25,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1304.7ms TimeCoverageRelationStatistics Valid=291, Invalid=2571, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:00:25,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 07:00:25,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 404. [2021-06-05 07:00:25,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 403 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 809 transitions. [2021-06-05 07:00:25,290 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 809 transitions. Word has length 30 [2021-06-05 07:00:25,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:25,290 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 809 transitions. [2021-06-05 07:00:25,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:25,290 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 809 transitions. [2021-06-05 07:00:25,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:25,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:25,291 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:25,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 07:00:25,505 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:25,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:25,505 INFO L82 PathProgramCache]: Analyzing trace with hash 735641693, now seen corresponding path program 61 times [2021-06-05 07:00:25,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:25,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146560035] [2021-06-05 07:00:25,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:25,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:25,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146560035] [2021-06-05 07:00:25,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146560035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:25,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609097069] [2021-06-05 07:00:25,732 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 [2021-06-05 07:00:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:25,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:00:25,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:25,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:00:25,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:25,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:25,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:25,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:00:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:26,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609097069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:26,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:26,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:00:26,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538093099] [2021-06-05 07:00:26,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:00:26,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:26,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:00:26,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:00:26,068 INFO L87 Difference]: Start difference. First operand 404 states and 809 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:27,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:27,085 INFO L93 Difference]: Finished difference Result 561 states and 1102 transitions. [2021-06-05 07:00:27,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:00:27,086 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:00:27,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:27,086 INFO L225 Difference]: With dead ends: 561 [2021-06-05 07:00:27,086 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 07:00:27,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1033.5ms TimeCoverageRelationStatistics Valid=256, Invalid=2396, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:00:27,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 07:00:27,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 403. [2021-06-05 07:00:27,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0074626865671643) internal successors, (807), 402 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:27,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 807 transitions. [2021-06-05 07:00:27,092 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 807 transitions. Word has length 30 [2021-06-05 07:00:27,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:27,092 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 807 transitions. [2021-06-05 07:00:27,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:27,092 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 807 transitions. [2021-06-05 07:00:27,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:27,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:27,093 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:27,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:27,309 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:27,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:27,309 INFO L82 PathProgramCache]: Analyzing trace with hash -2040286805, now seen corresponding path program 62 times [2021-06-05 07:00:27,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:27,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990743554] [2021-06-05 07:00:27,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:27,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:27,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990743554] [2021-06-05 07:00:27,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990743554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:27,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19506579] [2021-06-05 07:00:27,591 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 [2021-06-05 07:00:27,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:27,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:27,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:00:27,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:27,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:00:27,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:27,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:27,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:27,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:00:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:27,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19506579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:27,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:27,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 07:00:27,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891902861] [2021-06-05 07:00:27,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:00:27,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:27,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:00:27,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:00:27,999 INFO L87 Difference]: Start difference. First operand 403 states and 807 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:29,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:29,007 INFO L93 Difference]: Finished difference Result 562 states and 1103 transitions. [2021-06-05 07:00:29,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:00:29,007 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:00:29,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:29,008 INFO L225 Difference]: With dead ends: 562 [2021-06-05 07:00:29,008 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 07:00:29,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 1137.5ms TimeCoverageRelationStatistics Valid=283, Invalid=2687, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:00:29,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 07:00:29,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 390. [2021-06-05 07:00:29,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.0102827763496145) internal successors, (782), 389 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:29,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 782 transitions. [2021-06-05 07:00:29,012 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 782 transitions. Word has length 30 [2021-06-05 07:00:29,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:29,012 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 782 transitions. [2021-06-05 07:00:29,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:29,012 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 782 transitions. [2021-06-05 07:00:29,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:29,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:29,013 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:29,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:29,213 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:29,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:29,214 INFO L82 PathProgramCache]: Analyzing trace with hash 382318313, now seen corresponding path program 63 times [2021-06-05 07:00:29,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:29,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657342518] [2021-06-05 07:00:29,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:29,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:29,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657342518] [2021-06-05 07:00:29,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657342518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:29,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133499838] [2021-06-05 07:00:29,460 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 [2021-06-05 07:00:29,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:00:29,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:29,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:00:29,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:29,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:00:29,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:29,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:29,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:29,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:00:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:29,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133499838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:29,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:29,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:00:29,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917834340] [2021-06-05 07:00:29,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:29,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:29,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:29,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:29,829 INFO L87 Difference]: Start difference. First operand 390 states and 782 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:31,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:31,041 INFO L93 Difference]: Finished difference Result 588 states and 1150 transitions. [2021-06-05 07:00:31,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:00:31,041 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:00:31,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:31,042 INFO L225 Difference]: With dead ends: 588 [2021-06-05 07:00:31,042 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 07:00:31,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1209.7ms TimeCoverageRelationStatistics Valid=283, Invalid=2797, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:00:31,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 07:00:31,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 404. [2021-06-05 07:00:31,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0124069478908186) internal successors, (811), 403 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:31,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 811 transitions. [2021-06-05 07:00:31,047 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 811 transitions. Word has length 30 [2021-06-05 07:00:31,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:31,047 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 811 transitions. [2021-06-05 07:00:31,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:31,047 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 811 transitions. [2021-06-05 07:00:31,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:31,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:31,047 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:31,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:31,248 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:31,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:31,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1264384037, now seen corresponding path program 64 times [2021-06-05 07:00:31,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:31,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971522637] [2021-06-05 07:00:31,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:31,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:31,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971522637] [2021-06-05 07:00:31,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971522637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:31,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558425580] [2021-06-05 07:00:31,502 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) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:31,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:31,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:31,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:00:31,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:31,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:00:31,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:31,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:31,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:31,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:00:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:31,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558425580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:31,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:31,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:00:31,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302033284] [2021-06-05 07:00:31,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:31,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:31,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:31,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:31,886 INFO L87 Difference]: Start difference. First operand 404 states and 811 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:33,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:33,373 INFO L93 Difference]: Finished difference Result 522 states and 1031 transitions. [2021-06-05 07:00:33,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:00:33,373 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:00:33,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:33,374 INFO L225 Difference]: With dead ends: 522 [2021-06-05 07:00:33,374 INFO L226 Difference]: Without dead ends: 507 [2021-06-05 07:00:33,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1408.8ms TimeCoverageRelationStatistics Valid=321, Invalid=2871, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:00:33,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-05 07:00:33,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 402. [2021-06-05 07:00:33,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0124688279301743) internal successors, (807), 401 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:33,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 807 transitions. [2021-06-05 07:00:33,378 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 807 transitions. Word has length 30 [2021-06-05 07:00:33,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:33,378 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 807 transitions. [2021-06-05 07:00:33,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:33,379 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 807 transitions. [2021-06-05 07:00:33,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:33,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:33,379 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:33,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 07:00:33,580 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:33,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:33,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1561916541, now seen corresponding path program 65 times [2021-06-05 07:00:33,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:33,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915777473] [2021-06-05 07:00:33,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:33,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:33,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915777473] [2021-06-05 07:00:33,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915777473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:33,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100916526] [2021-06-05 07:00:33,811 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 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 [2021-06-05 07:00:33,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:00:33,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:33,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:00:33,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:33,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:00:33,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:33,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:33,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:33,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:00:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:34,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100916526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:34,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:34,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:00:34,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383118351] [2021-06-05 07:00:34,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:00:34,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:34,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:00:34,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:00:34,288 INFO L87 Difference]: Start difference. First operand 402 states and 807 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:35,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:35,696 INFO L93 Difference]: Finished difference Result 592 states and 1163 transitions. [2021-06-05 07:00:35,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:00:35,696 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:00:35,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:35,698 INFO L225 Difference]: With dead ends: 592 [2021-06-05 07:00:35,698 INFO L226 Difference]: Without dead ends: 575 [2021-06-05 07:00:35,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 1379.0ms TimeCoverageRelationStatistics Valid=306, Invalid=3000, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:00:35,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-06-05 07:00:35,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 411. [2021-06-05 07:00:35,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0073170731707317) internal successors, (823), 410 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 823 transitions. [2021-06-05 07:00:35,704 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 823 transitions. Word has length 30 [2021-06-05 07:00:35,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:35,704 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 823 transitions. [2021-06-05 07:00:35,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:35,705 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 823 transitions. [2021-06-05 07:00:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:35,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:35,705 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:35,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:35,929 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:35,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:35,929 INFO L82 PathProgramCache]: Analyzing trace with hash -42877743, now seen corresponding path program 66 times [2021-06-05 07:00:35,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:35,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359299127] [2021-06-05 07:00:35,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:36,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:36,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359299127] [2021-06-05 07:00:36,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359299127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:36,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177237919] [2021-06-05 07:00:36,199 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 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 [2021-06-05 07:00:36,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:00:36,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:36,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:00:36,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:36,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:00:36,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:36,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:36,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:36,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:00:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:36,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177237919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:36,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:36,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:00:36,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105040839] [2021-06-05 07:00:36,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:36,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:36,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:36,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:36,570 INFO L87 Difference]: Start difference. First operand 411 states and 823 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:38,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:38,132 INFO L93 Difference]: Finished difference Result 591 states and 1160 transitions. [2021-06-05 07:00:38,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:00:38,132 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:00:38,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:38,133 INFO L225 Difference]: With dead ends: 591 [2021-06-05 07:00:38,133 INFO L226 Difference]: Without dead ends: 547 [2021-06-05 07:00:38,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1432.6ms TimeCoverageRelationStatistics Valid=321, Invalid=3219, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:00:38,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-05 07:00:38,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 401. [2021-06-05 07:00:38,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.9975) internal successors, (799), 400 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 799 transitions. [2021-06-05 07:00:38,139 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 799 transitions. Word has length 30 [2021-06-05 07:00:38,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:38,139 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 799 transitions. [2021-06-05 07:00:38,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:38,139 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 799 transitions. [2021-06-05 07:00:38,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:38,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:38,140 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:38,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:38,357 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:38,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:38,357 INFO L82 PathProgramCache]: Analyzing trace with hash -673298151, now seen corresponding path program 67 times [2021-06-05 07:00:38,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:38,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117303330] [2021-06-05 07:00:38,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:38,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:38,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117303330] [2021-06-05 07:00:38,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117303330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:38,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828303227] [2021-06-05 07:00:38,600 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 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 [2021-06-05 07:00:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:38,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:00:38,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:38,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:00:38,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:38,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:38,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:38,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:00:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:38,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828303227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:38,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:38,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:00:38,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410293917] [2021-06-05 07:00:38,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:38,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:38,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:38,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:38,985 INFO L87 Difference]: Start difference. First operand 401 states and 799 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:39,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:39,810 INFO L93 Difference]: Finished difference Result 528 states and 1029 transitions. [2021-06-05 07:00:39,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:00:39,811 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:00:39,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:39,811 INFO L225 Difference]: With dead ends: 528 [2021-06-05 07:00:39,811 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 07:00:39,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 952.2ms TimeCoverageRelationStatistics Valid=203, Invalid=2053, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:00:39,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 07:00:39,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 403. [2021-06-05 07:00:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.9950248756218905) internal successors, (802), 402 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 802 transitions. [2021-06-05 07:00:39,815 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 802 transitions. Word has length 30 [2021-06-05 07:00:39,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:39,816 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 802 transitions. [2021-06-05 07:00:39,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:39,816 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 802 transitions. [2021-06-05 07:00:39,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:39,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:39,816 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:40,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 07:00:40,017 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:40,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:40,017 INFO L82 PathProgramCache]: Analyzing trace with hash 208767573, now seen corresponding path program 68 times [2021-06-05 07:00:40,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:40,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786427710] [2021-06-05 07:00:40,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:40,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:40,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786427710] [2021-06-05 07:00:40,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786427710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:40,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656780298] [2021-06-05 07:00:40,263 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 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 [2021-06-05 07:00:40,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:40,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:40,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:00:40,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:40,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:00:40,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:40,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:40,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:40,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:00:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:40,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656780298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:40,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:40,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:00:40,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026184053] [2021-06-05 07:00:40,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:40,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:40,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:40,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:40,690 INFO L87 Difference]: Start difference. First operand 403 states and 802 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:41,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:41,702 INFO L93 Difference]: Finished difference Result 462 states and 911 transitions. [2021-06-05 07:00:41,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:00:41,702 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:00:41,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:41,702 INFO L225 Difference]: With dead ends: 462 [2021-06-05 07:00:41,702 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 07:00:41,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1159.4ms TimeCoverageRelationStatistics Valid=230, Invalid=2122, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:00:41,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 07:00:41,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 393. [2021-06-05 07:00:41,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.00765306122449) internal successors, (787), 392 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:41,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 787 transitions. [2021-06-05 07:00:41,706 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 787 transitions. Word has length 30 [2021-06-05 07:00:41,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:41,706 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 787 transitions. [2021-06-05 07:00:41,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:41,706 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 787 transitions. [2021-06-05 07:00:41,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:41,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:41,707 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:41,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:41,907 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:41,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:41,908 INFO L82 PathProgramCache]: Analyzing trace with hash -669240077, now seen corresponding path program 69 times [2021-06-05 07:00:41,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:41,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749658454] [2021-06-05 07:00:41,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:42,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:42,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749658454] [2021-06-05 07:00:42,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749658454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:42,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015248539] [2021-06-05 07:00:42,182 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 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 [2021-06-05 07:00:42,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:00:42,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:42,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:00:42,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:42,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:00:42,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:42,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:42,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:42,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 07:00:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:42,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015248539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:42,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:42,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:00:42,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936227233] [2021-06-05 07:00:42,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:42,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:42,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:42,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:42,597 INFO L87 Difference]: Start difference. First operand 393 states and 787 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:43,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:43,473 INFO L93 Difference]: Finished difference Result 530 states and 1043 transitions. [2021-06-05 07:00:43,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:00:43,473 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:00:43,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:43,474 INFO L225 Difference]: With dead ends: 530 [2021-06-05 07:00:43,474 INFO L226 Difference]: Without dead ends: 497 [2021-06-05 07:00:43,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1073.2ms TimeCoverageRelationStatistics Valid=206, Invalid=2050, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:00:43,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-05 07:00:43,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 389. [2021-06-05 07:00:43,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.0103092783505154) internal successors, (780), 388 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:43,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 780 transitions. [2021-06-05 07:00:43,478 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 780 transitions. Word has length 30 [2021-06-05 07:00:43,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:43,478 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 780 transitions. [2021-06-05 07:00:43,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:43,478 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 780 transitions. [2021-06-05 07:00:43,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:43,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:43,479 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:43,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:43,679 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:43,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:43,679 INFO L82 PathProgramCache]: Analyzing trace with hash -838485543, now seen corresponding path program 70 times [2021-06-05 07:00:43,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:43,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595044952] [2021-06-05 07:00:43,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:43,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:43,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595044952] [2021-06-05 07:00:43,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595044952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:43,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410801176] [2021-06-05 07:00:43,900 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 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 [2021-06-05 07:00:43,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:43,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:43,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:00:43,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:44,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:00:44,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:44,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:44,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:44,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:00:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:44,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410801176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:44,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:44,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:00:44,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393108237] [2021-06-05 07:00:44,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:44,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:44,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:44,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:44,277 INFO L87 Difference]: Start difference. First operand 389 states and 780 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:45,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:45,367 INFO L93 Difference]: Finished difference Result 599 states and 1173 transitions. [2021-06-05 07:00:45,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:00:45,367 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:00:45,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:45,368 INFO L225 Difference]: With dead ends: 599 [2021-06-05 07:00:45,368 INFO L226 Difference]: Without dead ends: 590 [2021-06-05 07:00:45,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 1166.5ms TimeCoverageRelationStatistics Valid=283, Invalid=2797, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:00:45,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-06-05 07:00:45,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 404. [2021-06-05 07:00:45,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0148883374689825) internal successors, (812), 403 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:45,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 812 transitions. [2021-06-05 07:00:45,372 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 812 transitions. Word has length 30 [2021-06-05 07:00:45,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:45,373 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 812 transitions. [2021-06-05 07:00:45,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:45,373 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 812 transitions. [2021-06-05 07:00:45,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:45,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:45,373 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:45,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:45,574 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:45,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:45,574 INFO L82 PathProgramCache]: Analyzing trace with hash 43580181, now seen corresponding path program 71 times [2021-06-05 07:00:45,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:45,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030479244] [2021-06-05 07:00:45,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:45,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:45,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030479244] [2021-06-05 07:00:45,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030479244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:45,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591884506] [2021-06-05 07:00:45,810 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 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 [2021-06-05 07:00:45,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:00:45,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:45,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:00:45,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:45,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:00:45,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:45,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:45,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:45,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:00:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:46,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591884506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:46,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:46,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:00:46,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207878297] [2021-06-05 07:00:46,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:46,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:46,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:46,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:46,271 INFO L87 Difference]: Start difference. First operand 404 states and 812 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:47,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:47,650 INFO L93 Difference]: Finished difference Result 526 states and 1040 transitions. [2021-06-05 07:00:47,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:00:47,651 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:00:47,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:47,651 INFO L225 Difference]: With dead ends: 526 [2021-06-05 07:00:47,651 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 07:00:47,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1427.8ms TimeCoverageRelationStatistics Valid=321, Invalid=2871, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:00:47,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 07:00:47,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 402. [2021-06-05 07:00:47,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0149625935162097) internal successors, (808), 401 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:47,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 808 transitions. [2021-06-05 07:00:47,656 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 808 transitions. Word has length 30 [2021-06-05 07:00:47,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:47,656 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 808 transitions. [2021-06-05 07:00:47,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:47,656 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 808 transitions. [2021-06-05 07:00:47,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:47,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:47,656 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:47,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:47,857 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:47,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:47,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1512246899, now seen corresponding path program 72 times [2021-06-05 07:00:47,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:47,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667770979] [2021-06-05 07:00:47,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:48,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:48,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667770979] [2021-06-05 07:00:48,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667770979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:48,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146072103] [2021-06-05 07:00:48,082 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 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 [2021-06-05 07:00:48,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:00:48,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:48,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:00:48,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:48,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:00:48,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:48,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:48,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:48,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:00:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:48,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146072103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:48,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:48,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:00:48,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719852906] [2021-06-05 07:00:48,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:00:48,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:48,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:00:48,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:00:48,416 INFO L87 Difference]: Start difference. First operand 402 states and 808 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:49,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:49,666 INFO L93 Difference]: Finished difference Result 637 states and 1246 transitions. [2021-06-05 07:00:49,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:00:49,667 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:00:49,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:49,667 INFO L225 Difference]: With dead ends: 637 [2021-06-05 07:00:49,667 INFO L226 Difference]: Without dead ends: 620 [2021-06-05 07:00:49,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1254.7ms TimeCoverageRelationStatistics Valid=306, Invalid=3000, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:00:49,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-06-05 07:00:49,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 411. [2021-06-05 07:00:49,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2021-06-05 07:00:49,673 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2021-06-05 07:00:49,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:49,673 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2021-06-05 07:00:49,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:49,673 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2021-06-05 07:00:49,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:49,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:49,673 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:49,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:49,874 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:49,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:49,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1263681599, now seen corresponding path program 73 times [2021-06-05 07:00:49,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:49,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293067316] [2021-06-05 07:00:49,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:50,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:50,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293067316] [2021-06-05 07:00:50,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293067316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:50,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025799220] [2021-06-05 07:00:50,113 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 [2021-06-05 07:00:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:50,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:00:50,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:50,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:00:50,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:50,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:50,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:50,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:00:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:50,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025799220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:50,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:50,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:00:50,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791636190] [2021-06-05 07:00:50,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:50,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:50,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:50,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:50,565 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:51,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:51,943 INFO L93 Difference]: Finished difference Result 636 states and 1243 transitions. [2021-06-05 07:00:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:00:51,943 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:00:51,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:51,944 INFO L225 Difference]: With dead ends: 636 [2021-06-05 07:00:51,944 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 07:00:51,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 1339.4ms TimeCoverageRelationStatistics Valid=321, Invalid=3219, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:00:51,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 07:00:51,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 401. [2021-06-05 07:00:51,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0) internal successors, (800), 400 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:51,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 800 transitions. [2021-06-05 07:00:51,951 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 800 transitions. Word has length 30 [2021-06-05 07:00:51,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:51,951 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 800 transitions. [2021-06-05 07:00:51,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:51,951 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 800 transitions. [2021-06-05 07:00:51,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:51,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:51,952 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:52,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:52,168 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:52,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:52,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1894102007, now seen corresponding path program 74 times [2021-06-05 07:00:52,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:52,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426296217] [2021-06-05 07:00:52,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:52,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:52,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426296217] [2021-06-05 07:00:52,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426296217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:52,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726933927] [2021-06-05 07:00:52,400 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 [2021-06-05 07:00:52,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:52,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:52,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:00:52,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:52,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:00:52,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:52,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:52,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:52,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:00:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:52,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726933927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:52,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:52,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:00:52,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911299131] [2021-06-05 07:00:52,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:52,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:52,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:52,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:52,803 INFO L87 Difference]: Start difference. First operand 401 states and 800 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:53,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:53,669 INFO L93 Difference]: Finished difference Result 547 states and 1068 transitions. [2021-06-05 07:00:53,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:00:53,672 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:00:53,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:53,673 INFO L225 Difference]: With dead ends: 547 [2021-06-05 07:00:53,673 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 07:00:53,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 944.1ms TimeCoverageRelationStatistics Valid=205, Invalid=2051, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:00:53,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 07:00:53,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 403. [2021-06-05 07:00:53,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.9975124378109452) internal successors, (803), 402 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:53,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 803 transitions. [2021-06-05 07:00:53,677 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 803 transitions. Word has length 30 [2021-06-05 07:00:53,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:53,677 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 803 transitions. [2021-06-05 07:00:53,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:53,677 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 803 transitions. [2021-06-05 07:00:53,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:53,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:53,678 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:53,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 07:00:53,879 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:53,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:53,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1012036283, now seen corresponding path program 75 times [2021-06-05 07:00:53,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:53,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244908194] [2021-06-05 07:00:53,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:54,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:54,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244908194] [2021-06-05 07:00:54,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244908194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:54,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256756212] [2021-06-05 07:00:54,119 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 [2021-06-05 07:00:54,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:00:54,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:54,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:00:54,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:54,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:00:54,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:54,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:54,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:54,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:00:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:54,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256756212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:54,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:54,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:00:54,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983656838] [2021-06-05 07:00:54,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:54,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:54,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:54,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:54,529 INFO L87 Difference]: Start difference. First operand 403 states and 803 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:55,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:55,526 INFO L93 Difference]: Finished difference Result 471 states and 930 transitions. [2021-06-05 07:00:55,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:00:55,526 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:00:55,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:55,527 INFO L225 Difference]: With dead ends: 471 [2021-06-05 07:00:55,527 INFO L226 Difference]: Without dead ends: 448 [2021-06-05 07:00:55,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1097.9ms TimeCoverageRelationStatistics Valid=232, Invalid=2120, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:00:55,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-06-05 07:00:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 393. [2021-06-05 07:00:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.010204081632653) internal successors, (788), 392 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:55,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 788 transitions. [2021-06-05 07:00:55,531 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 788 transitions. Word has length 30 [2021-06-05 07:00:55,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:55,531 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 788 transitions. [2021-06-05 07:00:55,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:55,531 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 788 transitions. [2021-06-05 07:00:55,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:55,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:55,531 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:55,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:55,732 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:55,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:55,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1890043933, now seen corresponding path program 76 times [2021-06-05 07:00:55,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:55,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433639230] [2021-06-05 07:00:55,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:55,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:55,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433639230] [2021-06-05 07:00:55,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433639230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:55,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463844222] [2021-06-05 07:00:55,955 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 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 [2021-06-05 07:00:55,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:55,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:55,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:00:55,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:56,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:00:56,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:56,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:56,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:56,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:00:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:56,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463844222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:56,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:56,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:00:56,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460057293] [2021-06-05 07:00:56,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:56,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:56,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:56,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:56,339 INFO L87 Difference]: Start difference. First operand 393 states and 788 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:57,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:57,188 INFO L93 Difference]: Finished difference Result 552 states and 1087 transitions. [2021-06-05 07:00:57,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:00:57,188 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:00:57,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:57,189 INFO L225 Difference]: With dead ends: 552 [2021-06-05 07:00:57,189 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 07:00:57,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 942.8ms TimeCoverageRelationStatistics Valid=208, Invalid=2048, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:00:57,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 07:00:57,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 390. [2021-06-05 07:00:57,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.012853470437018) internal successors, (783), 389 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 783 transitions. [2021-06-05 07:00:57,193 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 783 transitions. Word has length 30 [2021-06-05 07:00:57,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:57,193 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 783 transitions. [2021-06-05 07:00:57,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:57,193 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 783 transitions. [2021-06-05 07:00:57,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:57,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:57,194 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:57,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 07:00:57,397 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:57,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:57,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1403906429, now seen corresponding path program 77 times [2021-06-05 07:00:57,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:57,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044682516] [2021-06-05 07:00:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:57,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:57,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044682516] [2021-06-05 07:00:57,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044682516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:57,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768630725] [2021-06-05 07:00:57,656 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 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 [2021-06-05 07:00:57,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:57,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:57,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:00:57,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:57,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:00:57,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:57,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:57,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:57,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:00:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:58,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768630725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:58,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:58,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:00:58,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676599425] [2021-06-05 07:00:58,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:58,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:58,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:58,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:58,044 INFO L87 Difference]: Start difference. First operand 390 states and 783 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:58,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:58,928 INFO L93 Difference]: Finished difference Result 542 states and 1057 transitions. [2021-06-05 07:00:58,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:00:58,928 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:00:58,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:58,928 INFO L225 Difference]: With dead ends: 542 [2021-06-05 07:00:58,928 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 07:00:58,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 947.1ms TimeCoverageRelationStatistics Valid=208, Invalid=2144, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:00:58,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 07:00:58,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 404. [2021-06-05 07:00:58,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 403 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:58,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 809 transitions. [2021-06-05 07:00:58,934 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 809 transitions. Word has length 30 [2021-06-05 07:00:58,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:58,934 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 809 transitions. [2021-06-05 07:00:58,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:58,934 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 809 transitions. [2021-06-05 07:00:58,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:00:58,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:58,935 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:59,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 07:00:59,149 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:59,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:59,149 INFO L82 PathProgramCache]: Analyzing trace with hash -521840705, now seen corresponding path program 78 times [2021-06-05 07:00:59,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:59,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950164127] [2021-06-05 07:00:59,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:59,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:59,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950164127] [2021-06-05 07:00:59,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950164127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:59,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394359037] [2021-06-05 07:00:59,386 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 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 [2021-06-05 07:00:59,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:00:59,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:59,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:00:59,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:59,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:00:59,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:59,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:59,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:59,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:00:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:59,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394359037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:59,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:59,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:00:59,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262963268] [2021-06-05 07:00:59,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:59,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:59,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:59,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:59,776 INFO L87 Difference]: Start difference. First operand 404 states and 809 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:00,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:00,823 INFO L93 Difference]: Finished difference Result 475 states and 938 transitions. [2021-06-05 07:01:00,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:01:00,824 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:00,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:00,824 INFO L225 Difference]: With dead ends: 475 [2021-06-05 07:01:00,824 INFO L226 Difference]: Without dead ends: 460 [2021-06-05 07:01:00,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1091.0ms TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:01:00,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-06-05 07:01:00,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 402. [2021-06-05 07:01:00,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:00,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2021-06-05 07:01:00,828 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2021-06-05 07:01:00,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:00,828 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2021-06-05 07:01:00,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:00,829 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2021-06-05 07:01:00,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:00,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:00,829 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:01,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:01,033 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:01,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:01,033 INFO L82 PathProgramCache]: Analyzing trace with hash 946826013, now seen corresponding path program 79 times [2021-06-05 07:01:01,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:01,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547654817] [2021-06-05 07:01:01,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:01,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:01,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547654817] [2021-06-05 07:01:01,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547654817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:01,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006447795] [2021-06-05 07:01:01,258 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 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 [2021-06-05 07:01:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:01,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:01:01,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:01,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:01:01,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:01,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:01,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:01,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:01:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:01,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006447795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:01,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:01,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:01:01,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50667319] [2021-06-05 07:01:01,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:01:01,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:01,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:01:01,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:01:01,584 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:02,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:02,359 INFO L93 Difference]: Finished difference Result 549 states and 1077 transitions. [2021-06-05 07:01:02,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:01:02,359 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:01:02,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:02,359 INFO L225 Difference]: With dead ends: 549 [2021-06-05 07:01:02,359 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 07:01:02,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 854.5ms TimeCoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:01:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 07:01:02,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 394. [2021-06-05 07:01:02,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.0076335877862594) internal successors, (789), 393 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:02,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 789 transitions. [2021-06-05 07:01:02,364 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 789 transitions. Word has length 30 [2021-06-05 07:01:02,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:02,364 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 789 transitions. [2021-06-05 07:01:02,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:02,365 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 789 transitions. [2021-06-05 07:01:02,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:02,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:02,365 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:02,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:02,581 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:02,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:02,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1399848355, now seen corresponding path program 80 times [2021-06-05 07:01:02,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:02,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136524101] [2021-06-05 07:01:02,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:02,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:02,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136524101] [2021-06-05 07:01:02,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136524101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:02,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533755000] [2021-06-05 07:01:02,806 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 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 [2021-06-05 07:01:02,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:01:02,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:02,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:01:02,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:02,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:01:02,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:02,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:02,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:02,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:01:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:03,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533755000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:03,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:03,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:03,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407772451] [2021-06-05 07:01:03,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:03,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:03,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:03,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:03,182 INFO L87 Difference]: Start difference. First operand 394 states and 789 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:03,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:03,934 INFO L93 Difference]: Finished difference Result 532 states and 1046 transitions. [2021-06-05 07:01:03,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:01:03,934 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:03,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:03,934 INFO L225 Difference]: With dead ends: 532 [2021-06-05 07:01:03,934 INFO L226 Difference]: Without dead ends: 499 [2021-06-05 07:01:03,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 892.4ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:01:03,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-06-05 07:01:03,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 392. [2021-06-05 07:01:03,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0076726342710995) internal successors, (785), 391 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:03,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 785 transitions. [2021-06-05 07:01:03,938 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 785 transitions. Word has length 30 [2021-06-05 07:01:03,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:03,939 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 785 transitions. [2021-06-05 07:01:03,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:03,939 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 785 transitions. [2021-06-05 07:01:03,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:03,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:03,939 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:04,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:04,140 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:04,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:04,140 INFO L82 PathProgramCache]: Analyzing trace with hash 555610201, now seen corresponding path program 81 times [2021-06-05 07:01:04,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:04,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655694225] [2021-06-05 07:01:04,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:04,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:04,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655694225] [2021-06-05 07:01:04,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655694225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:04,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762434534] [2021-06-05 07:01:04,381 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 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 [2021-06-05 07:01:04,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:01:04,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:04,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:01:04,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:04,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:01:04,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:04,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:04,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:04,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 07:01:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:04,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762434534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:04,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:04,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 07:01:04,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652571501] [2021-06-05 07:01:04,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:01:04,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:04,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:01:04,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:01:04,808 INFO L87 Difference]: Start difference. First operand 392 states and 785 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:05,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:05,628 INFO L93 Difference]: Finished difference Result 530 states and 1042 transitions. [2021-06-05 07:01:05,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:01:05,629 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:01:05,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:05,629 INFO L225 Difference]: With dead ends: 530 [2021-06-05 07:01:05,629 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 07:01:05,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1001.2ms TimeCoverageRelationStatistics Valid=207, Invalid=2243, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:01:05,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 07:01:05,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 388. [2021-06-05 07:01:05,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:05,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2021-06-05 07:01:05,633 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2021-06-05 07:01:05,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:05,634 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2021-06-05 07:01:05,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:05,634 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2021-06-05 07:01:05,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:05,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:05,634 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:05,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 07:01:05,835 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:05,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:05,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2013442739, now seen corresponding path program 82 times [2021-06-05 07:01:05,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:05,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417744799] [2021-06-05 07:01:05,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:06,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:06,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417744799] [2021-06-05 07:01:06,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417744799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:06,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062986099] [2021-06-05 07:01:06,069 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 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 [2021-06-05 07:01:06,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:01:06,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:06,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:01:06,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:06,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:01:06,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:06,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:06,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:06,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:01:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:06,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062986099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:06,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:06,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:06,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216396081] [2021-06-05 07:01:06,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:06,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:06,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:06,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:06,451 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:07,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:07,399 INFO L93 Difference]: Finished difference Result 561 states and 1100 transitions. [2021-06-05 07:01:07,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:01:07,400 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:07,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:07,401 INFO L225 Difference]: With dead ends: 561 [2021-06-05 07:01:07,401 INFO L226 Difference]: Without dead ends: 552 [2021-06-05 07:01:07,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1062.7ms TimeCoverageRelationStatistics Valid=256, Invalid=2500, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:01:07,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-05 07:01:07,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 409. [2021-06-05 07:01:07,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0073529411764706) internal successors, (819), 408 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:07,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 819 transitions. [2021-06-05 07:01:07,407 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 819 transitions. Word has length 30 [2021-06-05 07:01:07,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:07,407 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 819 transitions. [2021-06-05 07:01:07,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:07,407 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 819 transitions. [2021-06-05 07:01:07,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:07,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:07,407 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:07,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:07,630 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:07,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:07,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1399458833, now seen corresponding path program 83 times [2021-06-05 07:01:07,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:07,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596025193] [2021-06-05 07:01:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:07,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:07,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596025193] [2021-06-05 07:01:07,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596025193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:07,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142936609] [2021-06-05 07:01:07,936 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 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 [2021-06-05 07:01:07,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:01:07,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:07,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:01:07,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:08,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:01:08,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:08,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:08,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:08,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:01:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:08,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142936609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:08,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:08,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:08,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287757004] [2021-06-05 07:01:08,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:08,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:08,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:08,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:08,332 INFO L87 Difference]: Start difference. First operand 409 states and 819 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:09,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:09,459 INFO L93 Difference]: Finished difference Result 503 states and 999 transitions. [2021-06-05 07:01:09,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:01:09,459 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:09,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:09,459 INFO L225 Difference]: With dead ends: 503 [2021-06-05 07:01:09,459 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 07:01:09,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1300.8ms TimeCoverageRelationStatistics Valid=287, Invalid=2575, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:01:09,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 07:01:09,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 407. [2021-06-05 07:01:09,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0073891625615765) internal successors, (815), 406 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 815 transitions. [2021-06-05 07:01:09,463 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 815 transitions. Word has length 30 [2021-06-05 07:01:09,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:09,464 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 815 transitions. [2021-06-05 07:01:09,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:09,464 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 815 transitions. [2021-06-05 07:01:09,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:09,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:09,465 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:09,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-06-05 07:01:09,686 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:09,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:09,687 INFO L82 PathProgramCache]: Analyzing trace with hash 69207885, now seen corresponding path program 84 times [2021-06-05 07:01:09,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:09,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043148343] [2021-06-05 07:01:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:09,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:09,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043148343] [2021-06-05 07:01:09,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043148343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:09,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850111165] [2021-06-05 07:01:09,967 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:10,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:01:10,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:10,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:01:10,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:10,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:01:10,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:10,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:10,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:10,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:01:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:10,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850111165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:10,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:10,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:01:10,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280295133] [2021-06-05 07:01:10,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:01:10,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:10,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:01:10,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:01:10,341 INFO L87 Difference]: Start difference. First operand 407 states and 815 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:11,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:11,282 INFO L93 Difference]: Finished difference Result 556 states and 1094 transitions. [2021-06-05 07:01:11,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:01:11,283 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:01:11,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:11,283 INFO L225 Difference]: With dead ends: 556 [2021-06-05 07:01:11,283 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 07:01:11,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1065.1ms TimeCoverageRelationStatistics Valid=239, Invalid=2211, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:01:11,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 07:01:11,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 406. [2021-06-05 07:01:11,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0074074074074075) internal successors, (813), 405 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 813 transitions. [2021-06-05 07:01:11,288 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 813 transitions. Word has length 30 [2021-06-05 07:01:11,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:11,288 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 813 transitions. [2021-06-05 07:01:11,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:11,288 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 813 transitions. [2021-06-05 07:01:11,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:11,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:11,289 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:11,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:11,489 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:11,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1588246683, now seen corresponding path program 85 times [2021-06-05 07:01:11,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:11,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515523866] [2021-06-05 07:01:11,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:11,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:11,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515523866] [2021-06-05 07:01:11,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515523866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:11,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861747467] [2021-06-05 07:01:11,727 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 [2021-06-05 07:01:11,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:11,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:01:11,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:11,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:01:11,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:11,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:11,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:11,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:01:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:12,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861747467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:12,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:12,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:12,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139200400] [2021-06-05 07:01:12,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:12,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:12,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:12,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:12,092 INFO L87 Difference]: Start difference. First operand 406 states and 813 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:13,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:13,002 INFO L93 Difference]: Finished difference Result 558 states and 1097 transitions. [2021-06-05 07:01:13,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:01:13,002 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:13,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:13,003 INFO L225 Difference]: With dead ends: 558 [2021-06-05 07:01:13,003 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 07:01:13,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1035.7ms TimeCoverageRelationStatistics Valid=248, Invalid=2404, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:01:13,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 07:01:13,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 393. [2021-06-05 07:01:13,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.010204081632653) internal successors, (788), 392 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:13,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 788 transitions. [2021-06-05 07:01:13,007 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 788 transitions. Word has length 30 [2021-06-05 07:01:13,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:13,007 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 788 transitions. [2021-06-05 07:01:13,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:13,007 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 788 transitions. [2021-06-05 07:01:13,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:13,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:13,007 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:13,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:13,209 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:13,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:13,209 INFO L82 PathProgramCache]: Analyzing trace with hash -284115495, now seen corresponding path program 86 times [2021-06-05 07:01:13,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:13,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37909185] [2021-06-05 07:01:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:13,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:13,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37909185] [2021-06-05 07:01:13,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37909185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:13,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569984169] [2021-06-05 07:01:13,446 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 [2021-06-05 07:01:13,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:01:13,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:13,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:01:13,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:13,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:01:13,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:13,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:13,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:13,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:01:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:13,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569984169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:13,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:13,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 07:01:13,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641831394] [2021-06-05 07:01:13,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:01:13,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:13,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:01:13,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:01:13,895 INFO L87 Difference]: Start difference. First operand 393 states and 788 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:15,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:15,210 INFO L93 Difference]: Finished difference Result 589 states and 1152 transitions. [2021-06-05 07:01:15,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:01:15,210 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:01:15,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:15,211 INFO L225 Difference]: With dead ends: 589 [2021-06-05 07:01:15,211 INFO L226 Difference]: Without dead ends: 580 [2021-06-05 07:01:15,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1233.6ms TimeCoverageRelationStatistics Valid=315, Invalid=3225, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:01:15,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-06-05 07:01:15,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 407. [2021-06-05 07:01:15,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0123152709359604) internal successors, (817), 406 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:15,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 817 transitions. [2021-06-05 07:01:15,215 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 817 transitions. Word has length 30 [2021-06-05 07:01:15,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:15,215 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 817 transitions. [2021-06-05 07:01:15,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:15,215 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 817 transitions. [2021-06-05 07:01:15,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:15,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:15,216 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:15,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 07:01:15,417 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:15,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:15,418 INFO L82 PathProgramCache]: Analyzing trace with hash 597950229, now seen corresponding path program 87 times [2021-06-05 07:01:15,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:15,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25815887] [2021-06-05 07:01:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:15,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:15,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25815887] [2021-06-05 07:01:15,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25815887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:15,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201830300] [2021-06-05 07:01:15,657 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 [2021-06-05 07:01:15,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:01:15,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:15,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:01:15,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:15,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:01:15,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:15,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:15,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:15,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:01:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:16,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201830300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:16,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:16,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:16,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187408849] [2021-06-05 07:01:16,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:16,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:16,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:16,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:16,044 INFO L87 Difference]: Start difference. First operand 407 states and 817 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:17,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:17,418 INFO L93 Difference]: Finished difference Result 521 states and 1029 transitions. [2021-06-05 07:01:17,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:01:17,418 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:17,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:17,419 INFO L225 Difference]: With dead ends: 521 [2021-06-05 07:01:17,419 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 07:01:17,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1399.7ms TimeCoverageRelationStatistics Valid=314, Invalid=2878, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:01:17,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 07:01:17,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 405. [2021-06-05 07:01:17,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.012376237623762) internal successors, (813), 404 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 813 transitions. [2021-06-05 07:01:17,424 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 813 transitions. Word has length 30 [2021-06-05 07:01:17,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:17,424 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 813 transitions. [2021-06-05 07:01:17,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:17,424 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 813 transitions. [2021-06-05 07:01:17,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:17,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:17,424 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:17,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 07:01:17,625 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:17,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:17,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2066616947, now seen corresponding path program 88 times [2021-06-05 07:01:17,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:17,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331241018] [2021-06-05 07:01:17,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:17,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:17,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331241018] [2021-06-05 07:01:17,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331241018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:17,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745507780] [2021-06-05 07:01:17,855 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 [2021-06-05 07:01:17,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:01:17,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:17,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:01:17,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:18,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:01:18,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:18,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:18,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:18,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:01:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:18,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745507780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:18,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:18,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:01:18,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925746501] [2021-06-05 07:01:18,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:01:18,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:18,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:01:18,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:01:18,228 INFO L87 Difference]: Start difference. First operand 405 states and 813 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:19,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:19,589 INFO L93 Difference]: Finished difference Result 595 states and 1169 transitions. [2021-06-05 07:01:19,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:01:19,589 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:01:19,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:19,590 INFO L225 Difference]: With dead ends: 595 [2021-06-05 07:01:19,590 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 07:01:19,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 1267.1ms TimeCoverageRelationStatistics Valid=292, Invalid=2900, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:01:19,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 07:01:19,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 414. [2021-06-05 07:01:19,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.0072639225181597) internal successors, (829), 413 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:19,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 829 transitions. [2021-06-05 07:01:19,595 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 829 transitions. Word has length 30 [2021-06-05 07:01:19,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:19,595 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 829 transitions. [2021-06-05 07:01:19,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:19,595 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 829 transitions. [2021-06-05 07:01:19,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:19,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:19,595 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:19,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:19,796 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:19,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:19,796 INFO L82 PathProgramCache]: Analyzing trace with hash -709311551, now seen corresponding path program 89 times [2021-06-05 07:01:19,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:19,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449144594] [2021-06-05 07:01:19,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:20,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:20,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449144594] [2021-06-05 07:01:20,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449144594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:20,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714404364] [2021-06-05 07:01:20,029 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 [2021-06-05 07:01:20,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:01:20,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:20,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:01:20,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:20,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:01:20,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:20,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:20,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:20,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:01:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:20,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714404364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:20,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:20,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:20,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564679703] [2021-06-05 07:01:20,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:20,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:20,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:20,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:20,419 INFO L87 Difference]: Start difference. First operand 414 states and 829 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:21,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:21,813 INFO L93 Difference]: Finished difference Result 594 states and 1166 transitions. [2021-06-05 07:01:21,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:01:21,813 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:21,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:21,813 INFO L225 Difference]: With dead ends: 594 [2021-06-05 07:01:21,813 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 07:01:21,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1265.5ms TimeCoverageRelationStatistics Valid=307, Invalid=3115, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:01:21,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 07:01:21,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 404. [2021-06-05 07:01:21,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.9975186104218363) internal successors, (805), 403 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:21,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 805 transitions. [2021-06-05 07:01:21,818 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 805 transitions. Word has length 30 [2021-06-05 07:01:21,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:21,818 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 805 transitions. [2021-06-05 07:01:21,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:21,818 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 805 transitions. [2021-06-05 07:01:21,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:21,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:21,819 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:22,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 07:01:22,019 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:22,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:22,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1339731959, now seen corresponding path program 90 times [2021-06-05 07:01:22,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:22,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995429191] [2021-06-05 07:01:22,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:22,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:22,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995429191] [2021-06-05 07:01:22,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995429191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:22,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543927037] [2021-06-05 07:01:22,256 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) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:22,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:01:22,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:22,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:01:22,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:22,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:01:22,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:22,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:22,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:22,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:01:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:22,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543927037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:22,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:22,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:22,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176419801] [2021-06-05 07:01:22,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:22,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:22,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:22,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:22,653 INFO L87 Difference]: Start difference. First operand 404 states and 805 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:23,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:23,405 INFO L93 Difference]: Finished difference Result 533 states and 1039 transitions. [2021-06-05 07:01:23,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:01:23,419 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:23,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:23,420 INFO L225 Difference]: With dead ends: 533 [2021-06-05 07:01:23,420 INFO L226 Difference]: Without dead ends: 524 [2021-06-05 07:01:23,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 946.8ms TimeCoverageRelationStatistics Valid=203, Invalid=2053, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:01:23,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-05 07:01:23,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 406. [2021-06-05 07:01:23,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.9950617283950618) internal successors, (808), 405 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:23,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 808 transitions. [2021-06-05 07:01:23,428 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 808 transitions. Word has length 30 [2021-06-05 07:01:23,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:23,428 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 808 transitions. [2021-06-05 07:01:23,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:23,429 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 808 transitions. [2021-06-05 07:01:23,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:23,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:23,429 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:23,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 07:01:23,630 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:23,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:23,630 INFO L82 PathProgramCache]: Analyzing trace with hash -457666235, now seen corresponding path program 91 times [2021-06-05 07:01:23,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:23,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862272790] [2021-06-05 07:01:23,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:23,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:23,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862272790] [2021-06-05 07:01:23,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862272790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:23,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105049676] [2021-06-05 07:01:23,878 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 [2021-06-05 07:01:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:23,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:01:23,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:24,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:01:24,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:24,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:24,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:24,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:01:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:24,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105049676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:24,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:24,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:24,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209320768] [2021-06-05 07:01:24,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:24,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:24,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:24,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:24,304 INFO L87 Difference]: Start difference. First operand 406 states and 808 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:25,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:25,375 INFO L93 Difference]: Finished difference Result 461 states and 909 transitions. [2021-06-05 07:01:25,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:01:25,376 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:25,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:25,376 INFO L225 Difference]: With dead ends: 461 [2021-06-05 07:01:25,376 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 07:01:25,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1124.9ms TimeCoverageRelationStatistics Valid=230, Invalid=2122, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:01:25,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 07:01:25,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 396. [2021-06-05 07:01:25,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.007594936708861) internal successors, (793), 395 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:25,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 793 transitions. [2021-06-05 07:01:25,382 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 793 transitions. Word has length 30 [2021-06-05 07:01:25,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:25,382 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 793 transitions. [2021-06-05 07:01:25,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:25,382 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 793 transitions. [2021-06-05 07:01:25,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:25,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:25,382 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:25,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 07:01:25,585 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:25,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:25,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1335673885, now seen corresponding path program 92 times [2021-06-05 07:01:25,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:25,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070518632] [2021-06-05 07:01:25,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:25,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:25,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070518632] [2021-06-05 07:01:25,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070518632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:25,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210702228] [2021-06-05 07:01:25,808 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 [2021-06-05 07:01:25,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:01:25,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:25,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:01:25,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:25,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:01:25,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:25,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:25,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:25,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 07:01:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:26,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210702228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:26,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:26,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:26,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715302283] [2021-06-05 07:01:26,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:26,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:26,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:26,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:26,195 INFO L87 Difference]: Start difference. First operand 396 states and 793 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:27,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:27,021 INFO L93 Difference]: Finished difference Result 535 states and 1053 transitions. [2021-06-05 07:01:27,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:01:27,022 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:27,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:27,022 INFO L225 Difference]: With dead ends: 535 [2021-06-05 07:01:27,022 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 07:01:27,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 976.7ms TimeCoverageRelationStatistics Valid=206, Invalid=2050, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:01:27,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 07:01:27,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 392. [2021-06-05 07:01:27,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.010230179028133) internal successors, (786), 391 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 786 transitions. [2021-06-05 07:01:27,026 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 786 transitions. Word has length 30 [2021-06-05 07:01:27,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:27,026 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 786 transitions. [2021-06-05 07:01:27,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:27,027 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 786 transitions. [2021-06-05 07:01:27,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:27,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:27,027 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:27,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:27,228 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:27,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:27,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1504919351, now seen corresponding path program 93 times [2021-06-05 07:01:27,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:27,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353730149] [2021-06-05 07:01:27,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:27,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:27,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353730149] [2021-06-05 07:01:27,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353730149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:27,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381510928] [2021-06-05 07:01:27,458 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 [2021-06-05 07:01:27,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:01:27,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:27,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:01:27,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:27,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:01:27,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:27,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:27,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:27,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:01:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:27,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381510928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:27,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:27,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:27,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664954895] [2021-06-05 07:01:27,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:27,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:27,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:27,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:27,860 INFO L87 Difference]: Start difference. First operand 392 states and 786 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:29,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:29,092 INFO L93 Difference]: Finished difference Result 603 states and 1181 transitions. [2021-06-05 07:01:29,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:01:29,092 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:29,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:29,093 INFO L225 Difference]: With dead ends: 603 [2021-06-05 07:01:29,093 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 07:01:29,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1176.1ms TimeCoverageRelationStatistics Valid=276, Invalid=2804, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:01:29,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 07:01:29,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 407. [2021-06-05 07:01:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0147783251231526) internal successors, (818), 406 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 818 transitions. [2021-06-05 07:01:29,101 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 818 transitions. Word has length 30 [2021-06-05 07:01:29,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:29,101 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 818 transitions. [2021-06-05 07:01:29,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:29,101 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 818 transitions. [2021-06-05 07:01:29,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:29,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:29,102 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:29,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 07:01:29,305 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:29,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:29,305 INFO L82 PathProgramCache]: Analyzing trace with hash -622853627, now seen corresponding path program 94 times [2021-06-05 07:01:29,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:29,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289656846] [2021-06-05 07:01:29,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:29,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:29,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289656846] [2021-06-05 07:01:29,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289656846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:29,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372922314] [2021-06-05 07:01:29,545 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 [2021-06-05 07:01:29,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:01:29,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:29,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:01:29,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:29,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:01:29,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:29,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:29,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:29,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:01:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:29,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372922314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:29,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:29,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:29,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987191215] [2021-06-05 07:01:29,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:29,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:29,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:29,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:29,921 INFO L87 Difference]: Start difference. First operand 407 states and 818 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:31,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:31,249 INFO L93 Difference]: Finished difference Result 529 states and 1046 transitions. [2021-06-05 07:01:31,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:01:31,250 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:31,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:31,250 INFO L225 Difference]: With dead ends: 529 [2021-06-05 07:01:31,250 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 07:01:31,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1352.9ms TimeCoverageRelationStatistics Valid=314, Invalid=2878, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:01:31,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 07:01:31,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 405. [2021-06-05 07:01:31,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.014851485148515) internal successors, (814), 404 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:31,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 814 transitions. [2021-06-05 07:01:31,254 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 814 transitions. Word has length 30 [2021-06-05 07:01:31,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:31,254 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 814 transitions. [2021-06-05 07:01:31,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:31,254 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 814 transitions. [2021-06-05 07:01:31,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:31,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:31,255 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:31,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 07:01:31,455 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:31,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:31,455 INFO L82 PathProgramCache]: Analyzing trace with hash 845813091, now seen corresponding path program 95 times [2021-06-05 07:01:31,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:31,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842827123] [2021-06-05 07:01:31,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:31,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:31,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842827123] [2021-06-05 07:01:31,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842827123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:31,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578574813] [2021-06-05 07:01:31,721 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 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 [2021-06-05 07:01:31,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:01:31,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:31,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:01:31,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:31,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:01:31,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:31,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:31,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:31,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:01:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:32,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578574813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:32,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:32,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:01:32,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221322085] [2021-06-05 07:01:32,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:01:32,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:32,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:01:32,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:01:32,057 INFO L87 Difference]: Start difference. First operand 405 states and 814 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:33,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:33,565 INFO L93 Difference]: Finished difference Result 640 states and 1252 transitions. [2021-06-05 07:01:33,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:01:33,565 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:01:33,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:33,566 INFO L225 Difference]: With dead ends: 640 [2021-06-05 07:01:33,566 INFO L226 Difference]: Without dead ends: 623 [2021-06-05 07:01:33,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1299.3ms TimeCoverageRelationStatistics Valid=292, Invalid=2900, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:01:33,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-06-05 07:01:33,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 414. [2021-06-05 07:01:33,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.009685230024213) internal successors, (830), 413 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 830 transitions. [2021-06-05 07:01:33,570 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 830 transitions. Word has length 30 [2021-06-05 07:01:33,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:33,570 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 830 transitions. [2021-06-05 07:01:33,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 830 transitions. [2021-06-05 07:01:33,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:33,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:33,571 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:33,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 07:01:33,772 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:33,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:33,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1930115407, now seen corresponding path program 96 times [2021-06-05 07:01:33,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:33,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405709269] [2021-06-05 07:01:33,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:33,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:33,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405709269] [2021-06-05 07:01:33,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405709269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:33,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887978316] [2021-06-05 07:01:33,994 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 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 [2021-06-05 07:01:34,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:01:34,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:34,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:01:34,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:34,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:01:34,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:34,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:34,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:34,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:01:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:34,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887978316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:34,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:34,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:34,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230378459] [2021-06-05 07:01:34,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:34,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:34,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:34,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:34,367 INFO L87 Difference]: Start difference. First operand 414 states and 830 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:35,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:35,660 INFO L93 Difference]: Finished difference Result 639 states and 1249 transitions. [2021-06-05 07:01:35,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:01:35,660 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:35,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:35,661 INFO L225 Difference]: With dead ends: 639 [2021-06-05 07:01:35,661 INFO L226 Difference]: Without dead ends: 595 [2021-06-05 07:01:35,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1220.6ms TimeCoverageRelationStatistics Valid=307, Invalid=3115, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:01:35,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-06-05 07:01:35,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 404. [2021-06-05 07:01:35,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0) internal successors, (806), 403 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:35,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 806 transitions. [2021-06-05 07:01:35,665 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 806 transitions. Word has length 30 [2021-06-05 07:01:35,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:35,665 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 806 transitions. [2021-06-05 07:01:35,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:35,665 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 806 transitions. [2021-06-05 07:01:35,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:35,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:35,666 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:35,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:35,866 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:35,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:35,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1734431481, now seen corresponding path program 97 times [2021-06-05 07:01:35,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:35,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648930666] [2021-06-05 07:01:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:36,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:36,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648930666] [2021-06-05 07:01:36,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648930666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:36,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236976942] [2021-06-05 07:01:36,103 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 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 [2021-06-05 07:01:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:36,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:01:36,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:36,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:01:36,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:36,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:36,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:36,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:01:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:36,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236976942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:36,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:36,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:36,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391569400] [2021-06-05 07:01:36,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:36,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:36,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:36,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:36,490 INFO L87 Difference]: Start difference. First operand 404 states and 806 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:37,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:37,346 INFO L93 Difference]: Finished difference Result 552 states and 1078 transitions. [2021-06-05 07:01:37,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:01:37,346 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:37,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:37,347 INFO L225 Difference]: With dead ends: 552 [2021-06-05 07:01:37,347 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 07:01:37,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 915.0ms TimeCoverageRelationStatistics Valid=205, Invalid=2051, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:01:37,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 07:01:37,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 406. [2021-06-05 07:01:37,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.997530864197531) internal successors, (809), 405 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:37,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 809 transitions. [2021-06-05 07:01:37,351 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 809 transitions. Word has length 30 [2021-06-05 07:01:37,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:37,351 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 809 transitions. [2021-06-05 07:01:37,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:37,351 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 809 transitions. [2021-06-05 07:01:37,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:37,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:37,351 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:37,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:37,552 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:37,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:37,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1678470091, now seen corresponding path program 98 times [2021-06-05 07:01:37,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:37,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106364945] [2021-06-05 07:01:37,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:37,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:37,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106364945] [2021-06-05 07:01:37,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106364945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:37,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552455572] [2021-06-05 07:01:37,806 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 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 [2021-06-05 07:01:37,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:01:37,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:37,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:01:37,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:37,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:01:37,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:37,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:37,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:37,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:01:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:38,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552455572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:38,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:38,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:38,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964145716] [2021-06-05 07:01:38,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:38,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:38,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:38,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:38,193 INFO L87 Difference]: Start difference. First operand 406 states and 809 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:39,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:39,170 INFO L93 Difference]: Finished difference Result 473 states and 934 transitions. [2021-06-05 07:01:39,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:01:39,171 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:39,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:39,171 INFO L225 Difference]: With dead ends: 473 [2021-06-05 07:01:39,171 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 07:01:39,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1076.6ms TimeCoverageRelationStatistics Valid=232, Invalid=2120, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:01:39,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 07:01:39,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 396. [2021-06-05 07:01:39,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.010126582278481) internal successors, (794), 395 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:39,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 794 transitions. [2021-06-05 07:01:39,175 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 794 transitions. Word has length 30 [2021-06-05 07:01:39,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:39,175 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 794 transitions. [2021-06-05 07:01:39,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:39,175 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 794 transitions. [2021-06-05 07:01:39,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:39,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:39,175 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:39,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:39,376 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:39,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:39,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1738489555, now seen corresponding path program 99 times [2021-06-05 07:01:39,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:39,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421106515] [2021-06-05 07:01:39,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:39,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:39,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421106515] [2021-06-05 07:01:39,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421106515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:39,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705062713] [2021-06-05 07:01:39,600 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 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 [2021-06-05 07:01:39,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:01:39,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:39,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:01:39,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:39,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:01:39,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:39,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:39,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:39,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 07:01:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:39,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705062713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:39,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:39,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:39,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757580825] [2021-06-05 07:01:39,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:39,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:39,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:39,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:39,985 INFO L87 Difference]: Start difference. First operand 396 states and 794 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:40,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:40,882 INFO L93 Difference]: Finished difference Result 557 states and 1097 transitions. [2021-06-05 07:01:40,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:01:40,882 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:40,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:40,883 INFO L225 Difference]: With dead ends: 557 [2021-06-05 07:01:40,883 INFO L226 Difference]: Without dead ends: 524 [2021-06-05 07:01:40,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 961.4ms TimeCoverageRelationStatistics Valid=208, Invalid=2048, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:01:40,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-05 07:01:40,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 393. [2021-06-05 07:01:40,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.0127551020408165) internal successors, (789), 392 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:40,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 789 transitions. [2021-06-05 07:01:40,886 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 789 transitions. Word has length 30 [2021-06-05 07:01:40,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:40,887 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 789 transitions. [2021-06-05 07:01:40,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:40,887 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 789 transitions. [2021-06-05 07:01:40,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:40,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:40,887 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:41,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 07:01:41,088 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:41,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:41,088 INFO L82 PathProgramCache]: Analyzing trace with hash -2070340237, now seen corresponding path program 100 times [2021-06-05 07:01:41,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:41,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168166505] [2021-06-05 07:01:41,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:41,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:41,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168166505] [2021-06-05 07:01:41,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168166505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:41,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36968322] [2021-06-05 07:01:41,333 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 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 [2021-06-05 07:01:41,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:01:41,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:41,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:01:41,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:41,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:01:41,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:41,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:41,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:41,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:01:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:41,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36968322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:41,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:41,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:41,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802899533] [2021-06-05 07:01:41,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:41,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:41,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:41,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:41,748 INFO L87 Difference]: Start difference. First operand 393 states and 789 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:42,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:42,646 INFO L93 Difference]: Finished difference Result 547 states and 1067 transitions. [2021-06-05 07:01:42,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:01:42,646 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:42,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:42,647 INFO L225 Difference]: With dead ends: 547 [2021-06-05 07:01:42,647 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 07:01:42,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 944.8ms TimeCoverageRelationStatistics Valid=208, Invalid=2144, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:01:42,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 07:01:42,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 407. [2021-06-05 07:01:42,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0073891625615765) internal successors, (815), 406 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:42,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 815 transitions. [2021-06-05 07:01:42,651 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 815 transitions. Word has length 30 [2021-06-05 07:01:42,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:42,651 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 815 transitions. [2021-06-05 07:01:42,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:42,651 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 815 transitions. [2021-06-05 07:01:42,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:42,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:42,651 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:42,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 07:01:42,852 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:42,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:42,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1188274513, now seen corresponding path program 101 times [2021-06-05 07:01:42,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:42,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118773643] [2021-06-05 07:01:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:43,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:43,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118773643] [2021-06-05 07:01:43,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118773643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:43,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479669164] [2021-06-05 07:01:43,119 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 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 [2021-06-05 07:01:43,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:01:43,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:43,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:01:43,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:43,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:01:43,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:43,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:43,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:43,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:01:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:43,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479669164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:43,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:43,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:43,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902975269] [2021-06-05 07:01:43,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:43,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:43,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:43,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:43,653 INFO L87 Difference]: Start difference. First operand 407 states and 815 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:44,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:44,611 INFO L93 Difference]: Finished difference Result 478 states and 944 transitions. [2021-06-05 07:01:44,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:01:44,611 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:44,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:44,612 INFO L225 Difference]: With dead ends: 478 [2021-06-05 07:01:44,612 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 07:01:44,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1141.5ms TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:01:44,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 07:01:44,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 405. [2021-06-05 07:01:44,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.007425742574257) internal successors, (811), 404 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:44,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 811 transitions. [2021-06-05 07:01:44,616 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 811 transitions. Word has length 30 [2021-06-05 07:01:44,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:44,616 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 811 transitions. [2021-06-05 07:01:44,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:44,616 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 811 transitions. [2021-06-05 07:01:44,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:44,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:44,616 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:44,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 07:01:44,817 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:44,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:44,817 INFO L82 PathProgramCache]: Analyzing trace with hash 280392205, now seen corresponding path program 102 times [2021-06-05 07:01:44,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:44,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455806806] [2021-06-05 07:01:44,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:45,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:45,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455806806] [2021-06-05 07:01:45,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455806806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:45,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528796678] [2021-06-05 07:01:45,047 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 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 [2021-06-05 07:01:45,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:01:45,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:45,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:01:45,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:45,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:01:45,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:45,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:45,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:45,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:01:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:45,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528796678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:45,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:45,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:01:45,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773467082] [2021-06-05 07:01:45,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:01:45,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:45,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:01:45,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:01:45,384 INFO L87 Difference]: Start difference. First operand 405 states and 811 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:46,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:46,259 INFO L93 Difference]: Finished difference Result 554 states and 1087 transitions. [2021-06-05 07:01:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:01:46,259 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:01:46,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:46,260 INFO L225 Difference]: With dead ends: 554 [2021-06-05 07:01:46,260 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 07:01:46,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 853.7ms TimeCoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:01:46,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 07:01:46,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 397. [2021-06-05 07:01:46,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:46,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2021-06-05 07:01:46,263 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2021-06-05 07:01:46,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:46,264 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2021-06-05 07:01:46,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:46,264 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2021-06-05 07:01:46,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:46,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:46,264 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:46,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 07:01:46,465 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:46,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:46,465 INFO L82 PathProgramCache]: Analyzing trace with hash -2066282163, now seen corresponding path program 103 times [2021-06-05 07:01:46,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:46,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809272204] [2021-06-05 07:01:46,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:46,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:46,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809272204] [2021-06-05 07:01:46,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809272204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:46,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337124161] [2021-06-05 07:01:46,692 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 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 [2021-06-05 07:01:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:46,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:01:46,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:46,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:01:46,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:46,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:46,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:46,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:01:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:47,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337124161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:47,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:47,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:47,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426561250] [2021-06-05 07:01:47,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:47,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:47,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:47,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:47,072 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:47,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:47,798 INFO L93 Difference]: Finished difference Result 537 states and 1056 transitions. [2021-06-05 07:01:47,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:01:47,798 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:47,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:47,798 INFO L225 Difference]: With dead ends: 537 [2021-06-05 07:01:47,798 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 07:01:47,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 890.0ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:01:47,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 07:01:47,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 395. [2021-06-05 07:01:47,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.0076142131979697) internal successors, (791), 394 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:47,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 791 transitions. [2021-06-05 07:01:47,802 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 791 transitions. Word has length 30 [2021-06-05 07:01:47,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:47,802 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 791 transitions. [2021-06-05 07:01:47,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:47,803 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 791 transitions. [2021-06-05 07:01:47,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:47,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:47,803 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:48,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 07:01:48,004 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:48,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:48,004 INFO L82 PathProgramCache]: Analyzing trace with hash -110823607, now seen corresponding path program 104 times [2021-06-05 07:01:48,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:48,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088371762] [2021-06-05 07:01:48,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:48,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:48,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088371762] [2021-06-05 07:01:48,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088371762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:48,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204689562] [2021-06-05 07:01:48,259 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 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 [2021-06-05 07:01:48,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:01:48,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:48,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:01:48,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:48,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:01:48,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:48,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:48,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:48,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:01:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:48,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204689562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:48,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:48,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 07:01:48,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437355635] [2021-06-05 07:01:48,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:01:48,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:48,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:01:48,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:01:48,687 INFO L87 Difference]: Start difference. First operand 395 states and 791 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:49,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:49,511 INFO L93 Difference]: Finished difference Result 535 states and 1052 transitions. [2021-06-05 07:01:49,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:01:49,512 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:01:49,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:49,512 INFO L225 Difference]: With dead ends: 535 [2021-06-05 07:01:49,512 INFO L226 Difference]: Without dead ends: 499 [2021-06-05 07:01:49,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1001.7ms TimeCoverageRelationStatistics Valid=207, Invalid=2243, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:01:49,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-06-05 07:01:49,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 391. [2021-06-05 07:01:49,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.01025641025641) internal successors, (784), 390 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:49,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 784 transitions. [2021-06-05 07:01:49,516 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 784 transitions. Word has length 30 [2021-06-05 07:01:49,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:49,516 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 784 transitions. [2021-06-05 07:01:49,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:49,517 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 784 transitions. [2021-06-05 07:01:49,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:49,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:49,517 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:49,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:49,718 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:49,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:49,718 INFO L82 PathProgramCache]: Analyzing trace with hash 176162069, now seen corresponding path program 105 times [2021-06-05 07:01:49,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:49,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48041052] [2021-06-05 07:01:49,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:49,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:49,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48041052] [2021-06-05 07:01:49,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48041052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:49,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4403776] [2021-06-05 07:01:49,945 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 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 [2021-06-05 07:01:49,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:01:49,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:49,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:01:49,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:50,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:01:50,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:50,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:50,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:50,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:01:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:50,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4403776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:50,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:50,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:50,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991495592] [2021-06-05 07:01:50,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:50,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:50,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:50,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:50,318 INFO L87 Difference]: Start difference. First operand 391 states and 784 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:51,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:51,605 INFO L93 Difference]: Finished difference Result 664 states and 1303 transitions. [2021-06-05 07:01:51,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:01:51,605 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:51,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:51,606 INFO L225 Difference]: With dead ends: 664 [2021-06-05 07:01:51,606 INFO L226 Difference]: Without dead ends: 655 [2021-06-05 07:01:51,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1183.7ms TimeCoverageRelationStatistics Valid=280, Invalid=2912, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:01:51,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-05 07:01:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 409. [2021-06-05 07:01:51,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0220588235294117) internal successors, (825), 408 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:51,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 825 transitions. [2021-06-05 07:01:51,610 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 825 transitions. Word has length 30 [2021-06-05 07:01:51,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:51,610 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 825 transitions. [2021-06-05 07:01:51,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:51,610 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 825 transitions. [2021-06-05 07:01:51,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:51,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:51,611 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:51,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 07:01:51,811 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:51,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:51,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1058227793, now seen corresponding path program 106 times [2021-06-05 07:01:51,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:51,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672277545] [2021-06-05 07:01:51,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:52,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:52,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672277545] [2021-06-05 07:01:52,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672277545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:52,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097334869] [2021-06-05 07:01:52,049 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 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 [2021-06-05 07:01:52,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:01:52,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:52,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:01:52,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:52,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:01:52,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:52,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:52,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:52,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:01:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:52,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097334869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:52,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:52,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:52,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361855501] [2021-06-05 07:01:52,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:52,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:52,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:52,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:52,445 INFO L87 Difference]: Start difference. First operand 409 states and 825 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:54,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:54,078 INFO L93 Difference]: Finished difference Result 577 states and 1140 transitions. [2021-06-05 07:01:54,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:01:54,078 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:54,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:54,079 INFO L225 Difference]: With dead ends: 577 [2021-06-05 07:01:54,079 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 07:01:54,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 1403.8ms TimeCoverageRelationStatistics Valid=320, Invalid=2986, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:01:54,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 07:01:54,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 407. [2021-06-05 07:01:54,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.022167487684729) internal successors, (821), 406 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:54,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 821 transitions. [2021-06-05 07:01:54,083 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 821 transitions. Word has length 30 [2021-06-05 07:01:54,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:54,083 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 821 transitions. [2021-06-05 07:01:54,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:54,083 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 821 transitions. [2021-06-05 07:01:54,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:54,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:54,083 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:54,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:54,284 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:54,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:54,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1768072785, now seen corresponding path program 107 times [2021-06-05 07:01:54,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:54,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054453284] [2021-06-05 07:01:54,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:54,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:54,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:54,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054453284] [2021-06-05 07:01:54,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054453284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:54,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295794765] [2021-06-05 07:01:54,500 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 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 [2021-06-05 07:01:54,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:01:54,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:54,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:01:54,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:54,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:01:54,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:54,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:54,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:54,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:01:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:54,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295794765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:54,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:54,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:01:54,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135458576] [2021-06-05 07:01:54,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:01:54,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:54,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:01:54,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:01:54,848 INFO L87 Difference]: Start difference. First operand 407 states and 821 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:56,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:56,273 INFO L93 Difference]: Finished difference Result 710 states and 1388 transitions. [2021-06-05 07:01:56,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:01:56,273 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:01:56,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:56,274 INFO L225 Difference]: With dead ends: 710 [2021-06-05 07:01:56,274 INFO L226 Difference]: Without dead ends: 693 [2021-06-05 07:01:56,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1241.1ms TimeCoverageRelationStatistics Valid=296, Invalid=3010, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:01:56,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-06-05 07:01:56,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 416. [2021-06-05 07:01:56,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.016867469879518) internal successors, (837), 415 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:56,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 837 transitions. [2021-06-05 07:01:56,279 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 837 transitions. Word has length 30 [2021-06-05 07:01:56,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:56,279 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 837 transitions. [2021-06-05 07:01:56,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:56,279 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 837 transitions. [2021-06-05 07:01:56,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:56,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:56,280 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:56,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:56,503 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:56,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:56,503 INFO L82 PathProgramCache]: Analyzing trace with hash -249033987, now seen corresponding path program 108 times [2021-06-05 07:01:56,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:56,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857857872] [2021-06-05 07:01:56,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:56,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:56,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857857872] [2021-06-05 07:01:56,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857857872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:56,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240406770] [2021-06-05 07:01:56,745 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 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 [2021-06-05 07:01:56,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:01:56,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:56,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:01:56,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:56,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:01:56,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:56,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:56,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:56,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:01:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:57,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240406770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:57,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:57,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:57,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250667792] [2021-06-05 07:01:57,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:57,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:57,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:57,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:57,107 INFO L87 Difference]: Start difference. First operand 416 states and 837 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:58,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:58,417 INFO L93 Difference]: Finished difference Result 709 states and 1385 transitions. [2021-06-05 07:01:58,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 07:01:58,417 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:01:58,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:58,418 INFO L225 Difference]: With dead ends: 709 [2021-06-05 07:01:58,418 INFO L226 Difference]: Without dead ends: 665 [2021-06-05 07:01:58,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1261.9ms TimeCoverageRelationStatistics Valid=311, Invalid=3229, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:01:58,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-06-05 07:01:58,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 406. [2021-06-05 07:01:58,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0074074074074075) internal successors, (813), 405 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:58,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 813 transitions. [2021-06-05 07:01:58,423 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 813 transitions. Word has length 30 [2021-06-05 07:01:58,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:58,423 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 813 transitions. [2021-06-05 07:01:58,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:58,424 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 813 transitions. [2021-06-05 07:01:58,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:01:58,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:58,424 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:58,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-06-05 07:01:58,629 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:58,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:58,629 INFO L82 PathProgramCache]: Analyzing trace with hash -879454395, now seen corresponding path program 109 times [2021-06-05 07:01:58,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:58,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699540773] [2021-06-05 07:01:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:58,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:58,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699540773] [2021-06-05 07:01:58,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699540773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:58,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339733582] [2021-06-05 07:01:58,878 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:58,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:01:58,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:59,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:01:59,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:59,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:59,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:59,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:01:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:59,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339733582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:59,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:59,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:01:59,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983377846] [2021-06-05 07:01:59,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:59,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:59,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:59,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:59,264 INFO L87 Difference]: Start difference. First operand 406 states and 813 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:00,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:00,317 INFO L93 Difference]: Finished difference Result 582 states and 1141 transitions. [2021-06-05 07:02:00,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:02:00,318 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:02:00,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:00,318 INFO L225 Difference]: With dead ends: 582 [2021-06-05 07:02:00,318 INFO L226 Difference]: Without dead ends: 573 [2021-06-05 07:02:00,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 951.9ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:02:00,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-05 07:02:00,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 408. [2021-06-05 07:02:00,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.004914004914005) internal successors, (816), 407 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:00,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 816 transitions. [2021-06-05 07:02:00,322 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 816 transitions. Word has length 30 [2021-06-05 07:02:00,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:00,323 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 816 transitions. [2021-06-05 07:02:00,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:00,323 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 816 transitions. [2021-06-05 07:02:00,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:00,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:00,323 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:00,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:00,524 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:00,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:00,524 INFO L82 PathProgramCache]: Analyzing trace with hash 2611329, now seen corresponding path program 110 times [2021-06-05 07:02:00,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:00,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157191791] [2021-06-05 07:02:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:00,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:00,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157191791] [2021-06-05 07:02:00,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157191791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:00,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613407994] [2021-06-05 07:02:00,764 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 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 [2021-06-05 07:02:00,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:02:00,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:00,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:00,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:00,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:02:00,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:00,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:00,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:00,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:02:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:01,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613407994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:01,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:01,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:02:01,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743167009] [2021-06-05 07:02:01,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:02:01,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:01,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:02:01,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:02:01,151 INFO L87 Difference]: Start difference. First operand 408 states and 816 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:02,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:02,340 INFO L93 Difference]: Finished difference Result 494 states and 979 transitions. [2021-06-05 07:02:02,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:02:02,340 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:02:02,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:02,341 INFO L225 Difference]: With dead ends: 494 [2021-06-05 07:02:02,341 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 07:02:02,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1104.3ms TimeCoverageRelationStatistics Valid=238, Invalid=2212, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:02:02,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 07:02:02,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 398. [2021-06-05 07:02:02,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.017632241813602) internal successors, (801), 397 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:02,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 801 transitions. [2021-06-05 07:02:02,345 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 801 transitions. Word has length 30 [2021-06-05 07:02:02,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:02,345 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 801 transitions. [2021-06-05 07:02:02,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:02,345 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 801 transitions. [2021-06-05 07:02:02,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:02,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:02,345 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:02,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:02,546 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:02,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:02,546 INFO L82 PathProgramCache]: Analyzing trace with hash -875396321, now seen corresponding path program 111 times [2021-06-05 07:02:02,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:02,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837188922] [2021-06-05 07:02:02,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:02,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:02,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837188922] [2021-06-05 07:02:02,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837188922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:02,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489617980] [2021-06-05 07:02:02,771 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 [2021-06-05 07:02:02,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:02:02,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:02,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:02:02,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:02,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:02:02,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:02,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:02,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:02,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 07:02:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:03,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489617980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:03,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:03,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:02:03,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384406232] [2021-06-05 07:02:03,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:02:03,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:03,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:02:03,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:02:03,159 INFO L87 Difference]: Start difference. First operand 398 states and 801 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:04,145 INFO L93 Difference]: Finished difference Result 587 states and 1160 transitions. [2021-06-05 07:02:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:02:04,146 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:02:04,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:04,146 INFO L225 Difference]: With dead ends: 587 [2021-06-05 07:02:04,146 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 07:02:04,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 978.2ms TimeCoverageRelationStatistics Valid=212, Invalid=2140, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:02:04,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 07:02:04,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 395. [2021-06-05 07:02:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.020304568527919) internal successors, (796), 394 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:04,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 796 transitions. [2021-06-05 07:02:04,150 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 796 transitions. Word has length 30 [2021-06-05 07:02:04,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:04,150 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 796 transitions. [2021-06-05 07:02:04,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:04,150 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 796 transitions. [2021-06-05 07:02:04,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:04,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:04,151 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:04,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 07:02:04,351 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:04,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:04,352 INFO L82 PathProgramCache]: Analyzing trace with hash -389258817, now seen corresponding path program 112 times [2021-06-05 07:02:04,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:04,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396644558] [2021-06-05 07:02:04,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:04,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:04,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396644558] [2021-06-05 07:02:04,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396644558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:04,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856514836] [2021-06-05 07:02:04,583 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 [2021-06-05 07:02:04,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:02:04,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:04,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:04,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:04,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:02:04,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:04,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:04,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:04,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:02:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:04,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856514836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:04,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:04,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:02:04,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198563823] [2021-06-05 07:02:04,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:02:04,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:04,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:02:04,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:02:04,961 INFO L87 Difference]: Start difference. First operand 395 states and 796 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:05,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:05,897 INFO L93 Difference]: Finished difference Result 570 states and 1116 transitions. [2021-06-05 07:02:05,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:02:05,897 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:02:05,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:05,898 INFO L225 Difference]: With dead ends: 570 [2021-06-05 07:02:05,898 INFO L226 Difference]: Without dead ends: 561 [2021-06-05 07:02:05,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 909.5ms TimeCoverageRelationStatistics Valid=208, Invalid=2144, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:02:05,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-05 07:02:05,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 409. [2021-06-05 07:02:05,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.014705882352941) internal successors, (822), 408 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:05,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 822 transitions. [2021-06-05 07:02:05,902 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 822 transitions. Word has length 30 [2021-06-05 07:02:05,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:05,902 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 822 transitions. [2021-06-05 07:02:05,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:05,902 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 822 transitions. [2021-06-05 07:02:05,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:05,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:05,903 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:06,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:06,103 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:06,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:06,103 INFO L82 PathProgramCache]: Analyzing trace with hash 492806907, now seen corresponding path program 113 times [2021-06-05 07:02:06,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:06,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878661129] [2021-06-05 07:02:06,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:06,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:06,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878661129] [2021-06-05 07:02:06,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878661129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:06,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73406099] [2021-06-05 07:02:06,338 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 [2021-06-05 07:02:06,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:02:06,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:06,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:06,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:06,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:02:06,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:06,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:06,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:06,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:02:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:06,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73406099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:06,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:06,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:02:06,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979268988] [2021-06-05 07:02:06,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:02:06,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:06,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:02:06,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:02:06,722 INFO L87 Difference]: Start difference. First operand 409 states and 822 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:07,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:07,850 INFO L93 Difference]: Finished difference Result 501 states and 993 transitions. [2021-06-05 07:02:07,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:02:07,851 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:02:07,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:07,851 INFO L225 Difference]: With dead ends: 501 [2021-06-05 07:02:07,851 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 07:02:07,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1076.5ms TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:02:07,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 07:02:07,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 407. [2021-06-05 07:02:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0147783251231526) internal successors, (818), 406 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:07,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 818 transitions. [2021-06-05 07:02:07,855 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 818 transitions. Word has length 30 [2021-06-05 07:02:07,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:07,855 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 818 transitions. [2021-06-05 07:02:07,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:07,856 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 818 transitions. [2021-06-05 07:02:07,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:07,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:07,856 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:08,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 07:02:08,056 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:08,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:08,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1961473625, now seen corresponding path program 114 times [2021-06-05 07:02:08,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:08,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400023247] [2021-06-05 07:02:08,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:08,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:08,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400023247] [2021-06-05 07:02:08,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400023247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:08,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466975815] [2021-06-05 07:02:08,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 07:02:08,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:02:08,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:08,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:08,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:08,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:02:08,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:08,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:08,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:08,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:02:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:08,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466975815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:08,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:08,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:02:08,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523206463] [2021-06-05 07:02:08,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:02:08,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:08,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:02:08,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:02:08,624 INFO L87 Difference]: Start difference. First operand 407 states and 818 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:09,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:09,520 INFO L93 Difference]: Finished difference Result 577 states and 1136 transitions. [2021-06-05 07:02:09,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:02:09,521 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:02:09,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:09,521 INFO L225 Difference]: With dead ends: 577 [2021-06-05 07:02:09,521 INFO L226 Difference]: Without dead ends: 532 [2021-06-05 07:02:09,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 852.2ms TimeCoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:02:09,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-05 07:02:09,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 399. [2021-06-05 07:02:09,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.0150753768844223) internal successors, (802), 398 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:09,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 802 transitions. [2021-06-05 07:02:09,525 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 802 transitions. Word has length 30 [2021-06-05 07:02:09,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:09,525 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 802 transitions. [2021-06-05 07:02:09,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:09,526 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 802 transitions. [2021-06-05 07:02:09,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:09,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:09,526 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:09,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:09,729 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:09,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:09,729 INFO L82 PathProgramCache]: Analyzing trace with hash -385200743, now seen corresponding path program 115 times [2021-06-05 07:02:09,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:09,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560662994] [2021-06-05 07:02:09,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:09,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:09,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560662994] [2021-06-05 07:02:09,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560662994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:09,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279243356] [2021-06-05 07:02:09,963 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) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:09,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:09,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:10,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:02:10,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:10,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:10,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:10,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:02:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:10,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279243356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:10,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:10,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:02:10,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757171173] [2021-06-05 07:02:10,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:02:10,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:10,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:02:10,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:02:10,342 INFO L87 Difference]: Start difference. First operand 399 states and 802 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:11,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:11,113 INFO L93 Difference]: Finished difference Result 560 states and 1105 transitions. [2021-06-05 07:02:11,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:02:11,114 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:02:11,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:11,114 INFO L225 Difference]: With dead ends: 560 [2021-06-05 07:02:11,114 INFO L226 Difference]: Without dead ends: 527 [2021-06-05 07:02:11,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 894.1ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:02:11,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-05 07:02:11,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 397. [2021-06-05 07:02:11,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.015151515151515) internal successors, (798), 396 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:11,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 798 transitions. [2021-06-05 07:02:11,119 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 798 transitions. Word has length 30 [2021-06-05 07:02:11,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:11,119 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 798 transitions. [2021-06-05 07:02:11,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:11,119 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 798 transitions. [2021-06-05 07:02:11,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:11,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:11,120 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:11,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 07:02:11,325 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:11,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1570257813, now seen corresponding path program 116 times [2021-06-05 07:02:11,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:11,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697284571] [2021-06-05 07:02:11,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:11,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:11,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697284571] [2021-06-05 07:02:11,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697284571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:11,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331187586] [2021-06-05 07:02:11,601 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 [2021-06-05 07:02:11,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:02:11,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:11,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:11,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:11,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:02:11,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:11,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:11,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:11,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:02:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:12,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331187586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:12,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:12,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 07:02:12,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500907454] [2021-06-05 07:02:12,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:02:12,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:12,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:02:12,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:02:12,059 INFO L87 Difference]: Start difference. First operand 397 states and 798 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:12,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:12,993 INFO L93 Difference]: Finished difference Result 561 states and 1106 transitions. [2021-06-05 07:02:12,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:02:12,994 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:02:12,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:12,994 INFO L225 Difference]: With dead ends: 561 [2021-06-05 07:02:12,994 INFO L226 Difference]: Without dead ends: 525 [2021-06-05 07:02:12,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1018.5ms TimeCoverageRelationStatistics Valid=207, Invalid=2243, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:02:12,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-05 07:02:12,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 394. [2021-06-05 07:02:12,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.017811704834606) internal successors, (793), 393 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 793 transitions. [2021-06-05 07:02:12,998 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 793 transitions. Word has length 30 [2021-06-05 07:02:12,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:12,998 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 793 transitions. [2021-06-05 07:02:12,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 793 transitions. [2021-06-05 07:02:12,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:12,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:12,999 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:13,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:13,200 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:13,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:13,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2067864119, now seen corresponding path program 117 times [2021-06-05 07:02:13,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:13,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852595412] [2021-06-05 07:02:13,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:13,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:13,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:13,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852595412] [2021-06-05 07:02:13,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852595412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:13,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96066208] [2021-06-05 07:02:13,434 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 [2021-06-05 07:02:13,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:02:13,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:13,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:13,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:13,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:02:13,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:13,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:13,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:13,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:02:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:13,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96066208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:13,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:13,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:02:13,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583571904] [2021-06-05 07:02:13,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:02:13,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:13,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:02:13,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:02:13,825 INFO L87 Difference]: Start difference. First operand 394 states and 793 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:14,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:14,820 INFO L93 Difference]: Finished difference Result 588 states and 1145 transitions. [2021-06-05 07:02:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:02:14,820 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:02:14,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:14,821 INFO L225 Difference]: With dead ends: 588 [2021-06-05 07:02:14,821 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 07:02:14,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 952.3ms TimeCoverageRelationStatistics Valid=220, Invalid=2330, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:02:14,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 07:02:14,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 423. [2021-06-05 07:02:14,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.0118483412322274) internal successors, (849), 422 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:14,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 849 transitions. [2021-06-05 07:02:14,825 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 849 transitions. Word has length 30 [2021-06-05 07:02:14,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:14,825 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 849 transitions. [2021-06-05 07:02:14,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:14,825 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 849 transitions. [2021-06-05 07:02:14,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:14,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:14,826 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:15,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 07:02:15,029 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:15,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:15,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1185798395, now seen corresponding path program 118 times [2021-06-05 07:02:15,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:15,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436565464] [2021-06-05 07:02:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:15,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:15,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436565464] [2021-06-05 07:02:15,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436565464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:15,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649097503] [2021-06-05 07:02:15,263 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 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 [2021-06-05 07:02:15,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:02:15,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:15,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:15,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:15,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:02:15,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:15,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:15,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:15,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:02:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:15,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649097503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:15,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:15,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:02:15,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746547441] [2021-06-05 07:02:15,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:02:15,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:15,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:02:15,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:02:15,662 INFO L87 Difference]: Start difference. First operand 423 states and 849 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:17,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:17,100 INFO L93 Difference]: Finished difference Result 496 states and 973 transitions. [2021-06-05 07:02:17,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:02:17,101 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:02:17,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:17,101 INFO L225 Difference]: With dead ends: 496 [2021-06-05 07:02:17,101 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 07:02:17,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1259.8ms TimeCoverageRelationStatistics Valid=276, Invalid=2694, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:02:17,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 07:02:17,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 419. [2021-06-05 07:02:17,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.011961722488038) internal successors, (841), 418 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:17,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 841 transitions. [2021-06-05 07:02:17,105 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 841 transitions. Word has length 30 [2021-06-05 07:02:17,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:17,105 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 841 transitions. [2021-06-05 07:02:17,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:17,105 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 841 transitions. [2021-06-05 07:02:17,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:17,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:17,106 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:17,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:17,306 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:17,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:17,306 INFO L82 PathProgramCache]: Analyzing trace with hash 282868323, now seen corresponding path program 119 times [2021-06-05 07:02:17,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:17,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125231156] [2021-06-05 07:02:17,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:17,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:17,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125231156] [2021-06-05 07:02:17,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125231156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:17,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716731918] [2021-06-05 07:02:17,544 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 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 [2021-06-05 07:02:17,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:02:17,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:17,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:02:17,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:17,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:02:17,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:17,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:17,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:17,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:02:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:17,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716731918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:17,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:17,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:02:17,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405134887] [2021-06-05 07:02:17,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:02:17,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:17,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:02:17,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:02:17,878 INFO L87 Difference]: Start difference. First operand 419 states and 841 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:18,743 INFO L93 Difference]: Finished difference Result 603 states and 1176 transitions. [2021-06-05 07:02:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:02:18,743 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:02:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:18,744 INFO L225 Difference]: With dead ends: 603 [2021-06-05 07:02:18,744 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 07:02:18,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 878.0ms TimeCoverageRelationStatistics Valid=206, Invalid=1956, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:02:18,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 07:02:18,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 406. [2021-06-05 07:02:18,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:18,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 815 transitions. [2021-06-05 07:02:18,748 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 815 transitions. Word has length 30 [2021-06-05 07:02:18,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:18,748 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 815 transitions. [2021-06-05 07:02:18,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:18,748 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 815 transitions. [2021-06-05 07:02:18,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:18,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:18,748 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:18,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:18,949 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:18,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:18,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2063806045, now seen corresponding path program 120 times [2021-06-05 07:02:18,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:18,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478839107] [2021-06-05 07:02:18,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:19,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:19,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478839107] [2021-06-05 07:02:19,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478839107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:19,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984230526] [2021-06-05 07:02:19,173 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 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 [2021-06-05 07:02:19,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:02:19,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:19,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:19,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:19,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:02:19,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:19,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:19,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:19,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:02:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:19,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984230526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:19,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:19,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 07:02:19,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448503058] [2021-06-05 07:02:19,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:02:19,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:19,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:02:19,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:02:19,599 INFO L87 Difference]: Start difference. First operand 406 states and 815 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:20,595 INFO L93 Difference]: Finished difference Result 610 states and 1185 transitions. [2021-06-05 07:02:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:02:20,595 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:02:20,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:20,596 INFO L225 Difference]: With dead ends: 610 [2021-06-05 07:02:20,596 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 07:02:20,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 981.6ms TimeCoverageRelationStatistics Valid=233, Invalid=2419, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:02:20,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 07:02:20,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 403. [2021-06-05 07:02:20,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.012437810945274) internal successors, (809), 402 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:20,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 809 transitions. [2021-06-05 07:02:20,600 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 809 transitions. Word has length 30 [2021-06-05 07:02:20,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:20,600 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 809 transitions. [2021-06-05 07:02:20,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:20,600 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 809 transitions. [2021-06-05 07:02:20,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:20,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:20,601 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:20,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:20,801 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:20,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:20,802 INFO L82 PathProgramCache]: Analyzing trace with hash -108347489, now seen corresponding path program 121 times [2021-06-05 07:02:20,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:20,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890799948] [2021-06-05 07:02:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:21,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:21,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890799948] [2021-06-05 07:02:21,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890799948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:21,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994608483] [2021-06-05 07:02:21,045 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 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 [2021-06-05 07:02:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:21,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:21,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:21,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:02:21,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:21,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:21,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:21,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:02:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:21,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994608483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:21,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:21,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 07:02:21,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151885534] [2021-06-05 07:02:21,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:02:21,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:21,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:02:21,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:02:21,484 INFO L87 Difference]: Start difference. First operand 403 states and 809 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:22,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:22,474 INFO L93 Difference]: Finished difference Result 617 states and 1196 transitions. [2021-06-05 07:02:22,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:02:22,474 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:02:22,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:22,474 INFO L225 Difference]: With dead ends: 617 [2021-06-05 07:02:22,475 INFO L226 Difference]: Without dead ends: 581 [2021-06-05 07:02:22,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1011.3ms TimeCoverageRelationStatistics Valid=214, Invalid=2336, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:02:22,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-06-05 07:02:22,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 400. [2021-06-05 07:02:22,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0150375939849625) internal successors, (804), 399 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:22,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 804 transitions. [2021-06-05 07:02:22,479 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 804 transitions. Word has length 30 [2021-06-05 07:02:22,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:22,479 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 804 transitions. [2021-06-05 07:02:22,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:22,479 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 804 transitions. [2021-06-05 07:02:22,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:22,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:22,479 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:22,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 07:02:22,681 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:22,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:22,682 INFO L82 PathProgramCache]: Analyzing trace with hash -591750749, now seen corresponding path program 122 times [2021-06-05 07:02:22,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:22,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465268984] [2021-06-05 07:02:22,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:22,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:22,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465268984] [2021-06-05 07:02:22,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465268984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:22,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765012393] [2021-06-05 07:02:22,923 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 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 [2021-06-05 07:02:22,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:02:22,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:22,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:02:22,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:23,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:02:23,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:23,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:23,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:23,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2021-06-05 07:02:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:23,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765012393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:23,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:23,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 07:02:23,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636978880] [2021-06-05 07:02:23,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 07:02:23,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:23,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 07:02:23,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:02:23,401 INFO L87 Difference]: Start difference. First operand 400 states and 804 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:24,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:24,659 INFO L93 Difference]: Finished difference Result 551 states and 1084 transitions. [2021-06-05 07:02:24,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:02:24,660 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 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 30 [2021-06-05 07:02:24,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:24,660 INFO L225 Difference]: With dead ends: 551 [2021-06-05 07:02:24,660 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 07:02:24,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1213.4ms TimeCoverageRelationStatistics Valid=254, Invalid=2938, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:02:24,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 07:02:24,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 388. [2021-06-05 07:02:24,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:24,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2021-06-05 07:02:24,664 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2021-06-05 07:02:24,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:24,664 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2021-06-05 07:02:24,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:24,665 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2021-06-05 07:02:24,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:24,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:24,665 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:24,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 07:02:24,865 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:24,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:24,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1007356231, now seen corresponding path program 123 times [2021-06-05 07:02:24,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:24,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517518634] [2021-06-05 07:02:24,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:25,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:25,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517518634] [2021-06-05 07:02:25,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517518634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:25,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323546304] [2021-06-05 07:02:25,087 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 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 [2021-06-05 07:02:25,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:02:25,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:25,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:25,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:25,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:02:25,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:25,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:25,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:25,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:02:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:25,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323546304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:25,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:25,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-06-05 07:02:25,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113056092] [2021-06-05 07:02:25,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 07:02:25,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:25,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 07:02:25,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:02:25,392 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:26,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:26,058 INFO L93 Difference]: Finished difference Result 571 states and 1122 transitions. [2021-06-05 07:02:26,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:02:26,058 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 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 30 [2021-06-05 07:02:26,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:26,059 INFO L225 Difference]: With dead ends: 571 [2021-06-05 07:02:26,059 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 07:02:26,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 738.5ms TimeCoverageRelationStatistics Valid=203, Invalid=1689, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:02:26,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 07:02:26,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 415. [2021-06-05 07:02:26,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.002415458937198) internal successors, (829), 414 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:26,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 829 transitions. [2021-06-05 07:02:26,063 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 829 transitions. Word has length 30 [2021-06-05 07:02:26,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:26,064 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 829 transitions. [2021-06-05 07:02:26,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:26,064 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 829 transitions. [2021-06-05 07:02:26,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:26,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:26,064 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:26,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 07:02:26,265 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:26,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:26,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1889421955, now seen corresponding path program 124 times [2021-06-05 07:02:26,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:26,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276299954] [2021-06-05 07:02:26,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:26,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:26,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:26,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276299954] [2021-06-05 07:02:26,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276299954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:26,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353517912] [2021-06-05 07:02:26,493 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 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 [2021-06-05 07:02:26,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:02:26,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:26,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:26,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:26,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:02:26,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:26,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:26,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:26,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:02:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:26,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353517912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:26,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:26,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-06-05 07:02:26,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882450553] [2021-06-05 07:02:26,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:02:26,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:26,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:02:26,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:02:26,728 INFO L87 Difference]: Start difference. First operand 415 states and 829 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:27,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:27,476 INFO L93 Difference]: Finished difference Result 504 states and 1000 transitions. [2021-06-05 07:02:27,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:02:27,476 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 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 30 [2021-06-05 07:02:27,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:27,477 INFO L225 Difference]: With dead ends: 504 [2021-06-05 07:02:27,477 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 07:02:27,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 806.8ms TimeCoverageRelationStatistics Valid=198, Invalid=1442, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:02:27,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 07:02:27,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 413. [2021-06-05 07:02:27,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0024271844660193) internal successors, (825), 412 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:27,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 825 transitions. [2021-06-05 07:02:27,481 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 825 transitions. Word has length 30 [2021-06-05 07:02:27,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:27,481 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 825 transitions. [2021-06-05 07:02:27,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:27,481 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 825 transitions. [2021-06-05 07:02:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:27,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:27,481 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:27,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 07:02:27,682 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:27,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:27,682 INFO L82 PathProgramCache]: Analyzing trace with hash -936878623, now seen corresponding path program 125 times [2021-06-05 07:02:27,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:27,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076375300] [2021-06-05 07:02:27,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:27,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:27,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076375300] [2021-06-05 07:02:27,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076375300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:27,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363583657] [2021-06-05 07:02:27,921 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 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 [2021-06-05 07:02:27,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:02:27,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:27,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:02:27,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:27,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:02:27,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:27,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:27,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:27,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:02:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:28,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363583657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:28,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:28,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-05 07:02:28,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836719707] [2021-06-05 07:02:28,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:02:28,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:28,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:02:28,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:02:28,135 INFO L87 Difference]: Start difference. First operand 413 states and 825 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:28,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:28,839 INFO L93 Difference]: Finished difference Result 559 states and 1099 transitions. [2021-06-05 07:02:28,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:02:28,840 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 30 [2021-06-05 07:02:28,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:28,840 INFO L225 Difference]: With dead ends: 559 [2021-06-05 07:02:28,840 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 07:02:28,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 683.6ms TimeCoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:02:28,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 07:02:28,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 412. [2021-06-05 07:02:28,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.002433090024331) internal successors, (823), 411 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:28,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 823 transitions. [2021-06-05 07:02:28,845 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 823 transitions. Word has length 30 [2021-06-05 07:02:28,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:28,845 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 823 transitions. [2021-06-05 07:02:28,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:28,845 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 823 transitions. [2021-06-05 07:02:28,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:28,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:28,845 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:29,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 07:02:29,046 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:29,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:29,046 INFO L82 PathProgramCache]: Analyzing trace with hash 582160175, now seen corresponding path program 126 times [2021-06-05 07:02:29,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:29,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946661512] [2021-06-05 07:02:29,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:29,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:29,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946661512] [2021-06-05 07:02:29,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946661512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:29,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158391743] [2021-06-05 07:02:29,312 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 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 [2021-06-05 07:02:29,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:02:29,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:29,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:02:29,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:29,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:02:29,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:29,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:29,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:29,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:02:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:29,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158391743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:29,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:29,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-06-05 07:02:29,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523336419] [2021-06-05 07:02:29,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:02:29,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:29,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:02:29,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:02:29,541 INFO L87 Difference]: Start difference. First operand 412 states and 823 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:30,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:30,209 INFO L93 Difference]: Finished difference Result 561 states and 1102 transitions. [2021-06-05 07:02:30,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:02:30,209 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 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 30 [2021-06-05 07:02:30,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:30,210 INFO L225 Difference]: With dead ends: 561 [2021-06-05 07:02:30,210 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 07:02:30,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 738.5ms TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:02:30,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 07:02:30,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 396. [2021-06-05 07:02:30,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.007594936708861) internal successors, (793), 395 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:30,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 793 transitions. [2021-06-05 07:02:30,214 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 793 transitions. Word has length 30 [2021-06-05 07:02:30,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:30,214 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 793 transitions. [2021-06-05 07:02:30,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:30,214 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 793 transitions. [2021-06-05 07:02:30,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:30,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:30,214 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:30,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:30,415 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:30,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:30,415 INFO L82 PathProgramCache]: Analyzing trace with hash -829596899, now seen corresponding path program 127 times [2021-06-05 07:02:30,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:30,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306169483] [2021-06-05 07:02:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:30,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:30,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306169483] [2021-06-05 07:02:30,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306169483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:30,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130208346] [2021-06-05 07:02:30,623 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 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 [2021-06-05 07:02:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:30,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:30,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:30,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:02:30,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:30,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:30,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:30,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:02:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:30,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130208346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:30,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:30,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 07:02:30,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104213978] [2021-06-05 07:02:30,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:02:30,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:30,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:02:30,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:02:30,857 INFO L87 Difference]: Start difference. First operand 396 states and 793 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:31,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:31,533 INFO L93 Difference]: Finished difference Result 578 states and 1137 transitions. [2021-06-05 07:02:31,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:02:31,533 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 30 [2021-06-05 07:02:31,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:31,534 INFO L225 Difference]: With dead ends: 578 [2021-06-05 07:02:31,534 INFO L226 Difference]: Without dead ends: 569 [2021-06-05 07:02:31,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 647.5ms TimeCoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:02:31,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-06-05 07:02:31,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 413. [2021-06-05 07:02:31,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:31,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2021-06-05 07:02:31,538 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2021-06-05 07:02:31,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:31,538 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2021-06-05 07:02:31,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:31,538 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2021-06-05 07:02:31,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:31,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:31,538 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:31,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 07:02:31,739 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:31,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:31,739 INFO L82 PathProgramCache]: Analyzing trace with hash 52468825, now seen corresponding path program 128 times [2021-06-05 07:02:31,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:31,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383130007] [2021-06-05 07:02:31,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:31,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:31,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383130007] [2021-06-05 07:02:31,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383130007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:31,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757397962] [2021-06-05 07:02:31,961 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 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 [2021-06-05 07:02:31,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:02:31,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:31,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:31,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:32,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:02:32,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:32,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:32,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:32,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:02:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:32,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757397962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:32,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:32,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 26 [2021-06-05 07:02:32,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923442192] [2021-06-05 07:02:32,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:02:32,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:32,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:02:32,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:02:32,241 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:33,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:33,065 INFO L93 Difference]: Finished difference Result 503 states and 999 transitions. [2021-06-05 07:02:33,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:02:33,065 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:02:33,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:33,066 INFO L225 Difference]: With dead ends: 503 [2021-06-05 07:02:33,066 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 07:02:33,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 833.4ms TimeCoverageRelationStatistics Valid=226, Invalid=1580, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:02:33,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 07:02:33,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 411. [2021-06-05 07:02:33,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2021-06-05 07:02:33,070 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2021-06-05 07:02:33,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:33,070 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2021-06-05 07:02:33,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:33,070 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2021-06-05 07:02:33,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:33,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:33,070 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:33,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:33,271 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:33,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:33,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1521135543, now seen corresponding path program 129 times [2021-06-05 07:02:33,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:33,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874583800] [2021-06-05 07:02:33,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:33,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:33,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874583800] [2021-06-05 07:02:33,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874583800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:33,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042693992] [2021-06-05 07:02:33,474 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 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 [2021-06-05 07:02:33,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:02:33,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:33,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:33,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:33,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:02:33,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:33,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:33,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:33,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:02:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:33,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042693992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:33,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:33,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 24 [2021-06-05 07:02:33,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69797017] [2021-06-05 07:02:33,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:02:33,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:33,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:02:33,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:02:33,714 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:34,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:34,250 INFO L93 Difference]: Finished difference Result 563 states and 1109 transitions. [2021-06-05 07:02:34,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:02:34,251 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 30 [2021-06-05 07:02:34,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:34,251 INFO L225 Difference]: With dead ends: 563 [2021-06-05 07:02:34,251 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 07:02:34,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 650.8ms TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:02:34,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 07:02:34,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 410. [2021-06-05 07:02:34,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.0048899755501224) internal successors, (820), 409 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:34,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 820 transitions. [2021-06-05 07:02:34,257 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 820 transitions. Word has length 30 [2021-06-05 07:02:34,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:34,257 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 820 transitions. [2021-06-05 07:02:34,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:34,257 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 820 transitions. [2021-06-05 07:02:34,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:34,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:34,258 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:34,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:34,461 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:34,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:34,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1254792955, now seen corresponding path program 130 times [2021-06-05 07:02:34,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:34,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650362713] [2021-06-05 07:02:34,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:34,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:34,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650362713] [2021-06-05 07:02:34,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650362713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:34,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277482520] [2021-06-05 07:02:34,687 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 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 [2021-06-05 07:02:34,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:02:34,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:34,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:34,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:34,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:02:34,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:34,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:34,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:34,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:02:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:34,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277482520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:34,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:34,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 07:02:34,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459399498] [2021-06-05 07:02:34,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:02:34,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:34,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:02:34,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:02:34,912 INFO L87 Difference]: Start difference. First operand 410 states and 820 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:35,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:35,623 INFO L93 Difference]: Finished difference Result 559 states and 1099 transitions. [2021-06-05 07:02:35,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:02:35,624 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 30 [2021-06-05 07:02:35,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:35,624 INFO L225 Difference]: With dead ends: 559 [2021-06-05 07:02:35,624 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 07:02:35,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 657.2ms TimeCoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:02:35,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 07:02:35,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 397. [2021-06-05 07:02:35,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:35,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2021-06-05 07:02:35,628 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2021-06-05 07:02:35,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:35,628 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2021-06-05 07:02:35,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:35,628 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2021-06-05 07:02:35,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:35,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:35,629 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:35,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:35,829 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:35,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:35,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1167812163, now seen corresponding path program 131 times [2021-06-05 07:02:35,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:35,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115357138] [2021-06-05 07:02:35,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:36,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:36,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115357138] [2021-06-05 07:02:36,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115357138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:36,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631185730] [2021-06-05 07:02:36,052 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 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 [2021-06-05 07:02:36,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:02:36,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:36,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:02:36,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:36,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:02:36,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:36,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:36,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:36,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:02:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:36,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631185730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:36,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:36,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:02:36,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495988220] [2021-06-05 07:02:36,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:02:36,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:36,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:02:36,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:02:36,314 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:37,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:37,263 INFO L93 Difference]: Finished difference Result 601 states and 1178 transitions. [2021-06-05 07:02:37,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:02:37,264 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:02:37,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:37,264 INFO L225 Difference]: With dead ends: 601 [2021-06-05 07:02:37,264 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 07:02:37,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 894.4ms TimeCoverageRelationStatistics Valid=209, Invalid=1771, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:02:37,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 07:02:37,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 411. [2021-06-05 07:02:37,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:37,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2021-06-05 07:02:37,268 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2021-06-05 07:02:37,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:37,269 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2021-06-05 07:02:37,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:37,269 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2021-06-05 07:02:37,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:37,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:37,269 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:37,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:37,470 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:37,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:37,470 INFO L82 PathProgramCache]: Analyzing trace with hash 2049877887, now seen corresponding path program 132 times [2021-06-05 07:02:37,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:37,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686300164] [2021-06-05 07:02:37,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:37,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:37,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686300164] [2021-06-05 07:02:37,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686300164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:37,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035773777] [2021-06-05 07:02:37,697 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 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 [2021-06-05 07:02:37,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:02:37,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:37,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:02:37,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:37,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:02:37,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:37,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:37,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:37,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:02:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:37,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035773777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:37,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:37,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:02:37,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035498134] [2021-06-05 07:02:37,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:02:37,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:37,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:02:37,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:02:37,976 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:39,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:39,014 INFO L93 Difference]: Finished difference Result 518 states and 1022 transitions. [2021-06-05 07:02:39,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:02:39,014 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:02:39,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:39,014 INFO L225 Difference]: With dead ends: 518 [2021-06-05 07:02:39,014 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 07:02:39,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1043.4ms TimeCoverageRelationStatistics Valid=241, Invalid=1829, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:02:39,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 07:02:39,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 409. [2021-06-05 07:02:39,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0098039215686274) internal successors, (820), 408 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:39,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 820 transitions. [2021-06-05 07:02:39,018 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 820 transitions. Word has length 30 [2021-06-05 07:02:39,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:39,018 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 820 transitions. [2021-06-05 07:02:39,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:39,018 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 820 transitions. [2021-06-05 07:02:39,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:39,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:39,019 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:39,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 07:02:39,219 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:39,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:39,219 INFO L82 PathProgramCache]: Analyzing trace with hash -776422691, now seen corresponding path program 133 times [2021-06-05 07:02:39,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:39,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102347865] [2021-06-05 07:02:39,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:39,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:39,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102347865] [2021-06-05 07:02:39,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102347865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:39,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573466777] [2021-06-05 07:02:39,434 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 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 [2021-06-05 07:02:39,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:39,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:39,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:39,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:02:39,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:39,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:39,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:39,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:02:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:39,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573466777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:39,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:39,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 07:02:39,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23722175] [2021-06-05 07:02:39,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:02:39,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:39,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:02:39,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:02:39,661 INFO L87 Difference]: Start difference. First operand 409 states and 820 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:40,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:40,624 INFO L93 Difference]: Finished difference Result 589 states and 1157 transitions. [2021-06-05 07:02:40,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:02:40,625 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 30 [2021-06-05 07:02:40,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:40,625 INFO L225 Difference]: With dead ends: 589 [2021-06-05 07:02:40,625 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 07:02:40,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 987.3ms TimeCoverageRelationStatistics Valid=246, Invalid=2106, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:02:40,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 07:02:40,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 418. [2021-06-05 07:02:40,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.0047961630695443) internal successors, (836), 417 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:40,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 836 transitions. [2021-06-05 07:02:40,630 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 836 transitions. Word has length 30 [2021-06-05 07:02:40,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:40,630 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 836 transitions. [2021-06-05 07:02:40,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:40,630 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 836 transitions. [2021-06-05 07:02:40,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:40,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:40,630 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:40,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 07:02:40,831 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:40,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:40,832 INFO L82 PathProgramCache]: Analyzing trace with hash 742616107, now seen corresponding path program 134 times [2021-06-05 07:02:40,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:40,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130002768] [2021-06-05 07:02:40,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:41,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:41,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130002768] [2021-06-05 07:02:41,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130002768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:41,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375906877] [2021-06-05 07:02:41,046 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 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 [2021-06-05 07:02:41,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:02:41,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:41,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:41,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:41,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:02:41,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:41,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:41,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:41,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:02:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:41,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375906877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:41,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:41,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-06-05 07:02:41,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280252031] [2021-06-05 07:02:41,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 07:02:41,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:41,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 07:02:41,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:02:41,327 INFO L87 Difference]: Start difference. First operand 418 states and 836 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:42,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:42,391 INFO L93 Difference]: Finished difference Result 586 states and 1153 transitions. [2021-06-05 07:02:42,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:02:42,391 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 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 30 [2021-06-05 07:02:42,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:42,391 INFO L225 Difference]: With dead ends: 586 [2021-06-05 07:02:42,391 INFO L226 Difference]: Without dead ends: 551 [2021-06-05 07:02:42,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 940.0ms TimeCoverageRelationStatistics Valid=276, Invalid=2274, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:02:42,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-06-05 07:02:42,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 408. [2021-06-05 07:02:42,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.9950859950859952) internal successors, (812), 407 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:42,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 812 transitions. [2021-06-05 07:02:42,395 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 812 transitions. Word has length 30 [2021-06-05 07:02:42,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:42,395 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 812 transitions. [2021-06-05 07:02:42,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:42,395 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 812 transitions. [2021-06-05 07:02:42,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:42,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:42,396 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:42,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 07:02:42,596 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:42,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:42,597 INFO L82 PathProgramCache]: Analyzing trace with hash 112195699, now seen corresponding path program 135 times [2021-06-05 07:02:42,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:42,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297725191] [2021-06-05 07:02:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:42,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:42,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:42,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297725191] [2021-06-05 07:02:42,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297725191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:42,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973525278] [2021-06-05 07:02:42,830 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 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 [2021-06-05 07:02:42,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:02:42,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:42,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:42,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:42,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:02:42,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:42,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:42,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:42,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:02:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:43,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973525278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:43,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:43,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:02:43,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895248116] [2021-06-05 07:02:43,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:02:43,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:43,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:02:43,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:02:43,105 INFO L87 Difference]: Start difference. First operand 408 states and 812 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:43,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:43,929 INFO L93 Difference]: Finished difference Result 561 states and 1096 transitions. [2021-06-05 07:02:43,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:02:43,929 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:02:43,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:43,930 INFO L225 Difference]: With dead ends: 561 [2021-06-05 07:02:43,930 INFO L226 Difference]: Without dead ends: 552 [2021-06-05 07:02:43,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 849.7ms TimeCoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:02:43,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-05 07:02:43,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 410. [2021-06-05 07:02:43,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9926650366748166) internal successors, (815), 409 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:43,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 815 transitions. [2021-06-05 07:02:43,934 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 815 transitions. Word has length 30 [2021-06-05 07:02:43,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:43,934 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 815 transitions. [2021-06-05 07:02:43,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:43,934 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 815 transitions. [2021-06-05 07:02:43,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:43,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:43,935 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:44,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 07:02:44,135 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:44,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:44,135 INFO L82 PathProgramCache]: Analyzing trace with hash 994261423, now seen corresponding path program 136 times [2021-06-05 07:02:44,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:44,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492743853] [2021-06-05 07:02:44,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:44,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:44,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:44,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492743853] [2021-06-05 07:02:44,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492743853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:44,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171549464] [2021-06-05 07:02:44,360 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 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 [2021-06-05 07:02:44,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:02:44,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:44,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:44,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:44,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:02:44,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:44,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:44,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:44,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:02:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:44,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171549464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:44,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:44,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:02:44,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268824524] [2021-06-05 07:02:44,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:02:44,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:44,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:02:44,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:02:44,647 INFO L87 Difference]: Start difference. First operand 410 states and 815 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:45,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:45,663 INFO L93 Difference]: Finished difference Result 486 states and 958 transitions. [2021-06-05 07:02:45,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:02:45,663 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:02:45,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:45,664 INFO L225 Difference]: With dead ends: 486 [2021-06-05 07:02:45,664 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 07:02:45,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 997.4ms TimeCoverageRelationStatistics Valid=205, Invalid=1687, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:02:45,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 07:02:45,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 400. [2021-06-05 07:02:45,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0050125313283207) internal successors, (800), 399 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 800 transitions. [2021-06-05 07:02:45,667 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 800 transitions. Word has length 30 [2021-06-05 07:02:45,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:45,667 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 800 transitions. [2021-06-05 07:02:45,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:45,668 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 800 transitions. [2021-06-05 07:02:45,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:45,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:45,668 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:45,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 07:02:45,868 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:45,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:45,869 INFO L82 PathProgramCache]: Analyzing trace with hash 116253773, now seen corresponding path program 137 times [2021-06-05 07:02:45,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:45,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352622867] [2021-06-05 07:02:45,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:46,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:46,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352622867] [2021-06-05 07:02:46,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352622867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:46,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741931952] [2021-06-05 07:02:46,087 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 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 [2021-06-05 07:02:46,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:02:46,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:46,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:46,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:46,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:02:46,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:46,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:46,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:46,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:02:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:46,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741931952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:46,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:46,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:02:46,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429646295] [2021-06-05 07:02:46,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:02:46,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:46,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:02:46,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:02:46,359 INFO L87 Difference]: Start difference. First operand 400 states and 800 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:47,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:47,190 INFO L93 Difference]: Finished difference Result 545 states and 1071 transitions. [2021-06-05 07:02:47,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:02:47,191 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:02:47,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:47,191 INFO L225 Difference]: With dead ends: 545 [2021-06-05 07:02:47,191 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 07:02:47,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 867.1ms TimeCoverageRelationStatistics Valid=183, Invalid=1797, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:02:47,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 07:02:47,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 395. [2021-06-05 07:02:47,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.0076142131979697) internal successors, (791), 394 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:47,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 791 transitions. [2021-06-05 07:02:47,195 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 791 transitions. Word has length 30 [2021-06-05 07:02:47,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:47,195 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 791 transitions. [2021-06-05 07:02:47,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:47,195 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 791 transitions. [2021-06-05 07:02:47,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:47,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:47,196 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:47,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:47,396 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:47,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:47,396 INFO L82 PathProgramCache]: Analyzing trace with hash -891106063, now seen corresponding path program 138 times [2021-06-05 07:02:47,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:47,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956789198] [2021-06-05 07:02:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:47,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:47,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956789198] [2021-06-05 07:02:47,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956789198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:47,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612426838] [2021-06-05 07:02:47,652 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 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 [2021-06-05 07:02:47,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:02:47,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:47,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:02:47,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:47,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:02:47,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:47,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:47,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:47,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:02:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:48,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612426838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:48,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:48,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:02:48,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729601590] [2021-06-05 07:02:48,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:02:48,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:48,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:02:48,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:02:48,019 INFO L87 Difference]: Start difference. First operand 395 states and 791 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:48,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:48,813 INFO L93 Difference]: Finished difference Result 588 states and 1155 transitions. [2021-06-05 07:02:48,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:02:48,814 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:02:48,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:48,814 INFO L225 Difference]: With dead ends: 588 [2021-06-05 07:02:48,814 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 07:02:48,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 896.3ms TimeCoverageRelationStatistics Valid=225, Invalid=2031, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:02:48,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 07:02:48,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 413. [2021-06-05 07:02:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:48,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2021-06-05 07:02:48,818 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2021-06-05 07:02:48,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:48,818 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2021-06-05 07:02:48,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:48,819 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2021-06-05 07:02:48,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:48,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:48,819 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:49,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:49,019 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:49,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:49,020 INFO L82 PathProgramCache]: Analyzing trace with hash -9040339, now seen corresponding path program 139 times [2021-06-05 07:02:49,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:49,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822100231] [2021-06-05 07:02:49,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:49,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:49,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:49,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822100231] [2021-06-05 07:02:49,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822100231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:49,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708263162] [2021-06-05 07:02:49,249 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 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 [2021-06-05 07:02:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:49,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:49,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:49,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:02:49,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:49,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:49,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:49,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:02:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:49,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708263162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:49,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:49,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:02:49,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865549856] [2021-06-05 07:02:49,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:02:49,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:49,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:02:49,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:02:49,618 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:50,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:50,561 INFO L93 Difference]: Finished difference Result 513 states and 1017 transitions. [2021-06-05 07:02:50,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:02:50,561 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:02:50,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:50,562 INFO L225 Difference]: With dead ends: 513 [2021-06-05 07:02:50,562 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 07:02:50,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1010.9ms TimeCoverageRelationStatistics Valid=250, Invalid=2102, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:02:50,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 07:02:50,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 411. [2021-06-05 07:02:50,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:50,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2021-06-05 07:02:50,566 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2021-06-05 07:02:50,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:50,566 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2021-06-05 07:02:50,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:50,566 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2021-06-05 07:02:50,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:50,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:50,566 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:50,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:50,769 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:50,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:50,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1459626379, now seen corresponding path program 140 times [2021-06-05 07:02:50,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:50,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463468448] [2021-06-05 07:02:50,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:51,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:51,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463468448] [2021-06-05 07:02:51,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463468448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:51,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267337138] [2021-06-05 07:02:51,004 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 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 [2021-06-05 07:02:51,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:02:51,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:51,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:51,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:51,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:02:51,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:51,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:51,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:51,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:02:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:51,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267337138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:51,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:51,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2021-06-05 07:02:51,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895358715] [2021-06-05 07:02:51,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:02:51,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:51,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:02:51,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:02:51,376 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:52,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:52,196 INFO L93 Difference]: Finished difference Result 573 states and 1127 transitions. [2021-06-05 07:02:52,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:02:52,197 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:02:52,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:52,197 INFO L225 Difference]: With dead ends: 573 [2021-06-05 07:02:52,197 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 07:02:52,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 857.1ms TimeCoverageRelationStatistics Valid=237, Invalid=2019, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:02:52,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 07:02:52,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 410. [2021-06-05 07:02:52,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.0048899755501224) internal successors, (820), 409 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:52,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 820 transitions. [2021-06-05 07:02:52,201 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 820 transitions. Word has length 30 [2021-06-05 07:02:52,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:52,202 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 820 transitions. [2021-06-05 07:02:52,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:52,202 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 820 transitions. [2021-06-05 07:02:52,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:52,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:52,202 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:52,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:52,403 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:52,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:52,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1316302119, now seen corresponding path program 141 times [2021-06-05 07:02:52,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:52,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987633157] [2021-06-05 07:02:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:52,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:52,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987633157] [2021-06-05 07:02:52,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987633157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:52,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787614070] [2021-06-05 07:02:52,630 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 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 [2021-06-05 07:02:52,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:02:52,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:52,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:52,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:52,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:02:52,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:52,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:52,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:52,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:02:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:53,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787614070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:53,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:53,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 07:02:53,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910411349] [2021-06-05 07:02:53,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:02:53,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:53,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:02:53,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:02:53,105 INFO L87 Difference]: Start difference. First operand 410 states and 820 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:53,870 INFO L93 Difference]: Finished difference Result 575 states and 1130 transitions. [2021-06-05 07:02:53,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:02:53,870 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:02:53,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:53,871 INFO L225 Difference]: With dead ends: 575 [2021-06-05 07:02:53,871 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 07:02:53,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 953.8ms TimeCoverageRelationStatistics Valid=246, Invalid=2204, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:02:53,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 07:02:53,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 397. [2021-06-05 07:02:53,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:53,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2021-06-05 07:02:53,875 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2021-06-05 07:02:53,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:53,875 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2021-06-05 07:02:53,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:53,875 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2021-06-05 07:02:53,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:53,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:53,876 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:54,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:54,097 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:54,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:54,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1106302999, now seen corresponding path program 142 times [2021-06-05 07:02:54,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:54,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147522683] [2021-06-05 07:02:54,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:54,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:54,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147522683] [2021-06-05 07:02:54,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147522683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:54,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214515476] [2021-06-05 07:02:54,327 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 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 [2021-06-05 07:02:54,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:02:54,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:54,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:54,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:54,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:02:54,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:54,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:54,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:54,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:02:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:54,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214515476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:54,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:54,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:02:54,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267184268] [2021-06-05 07:02:54,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:02:54,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:54,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:02:54,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:02:54,686 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:55,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:55,623 INFO L93 Difference]: Finished difference Result 608 states and 1193 transitions. [2021-06-05 07:02:55,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:02:55,624 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:02:55,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:55,624 INFO L225 Difference]: With dead ends: 608 [2021-06-05 07:02:55,624 INFO L226 Difference]: Without dead ends: 599 [2021-06-05 07:02:55,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 956.5ms TimeCoverageRelationStatistics Valid=244, Invalid=2206, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:02:55,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-06-05 07:02:55,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 411. [2021-06-05 07:02:55,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:55,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2021-06-05 07:02:55,628 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2021-06-05 07:02:55,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:55,629 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2021-06-05 07:02:55,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:55,629 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2021-06-05 07:02:55,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:55,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:55,629 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:55,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:55,830 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:55,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:55,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1988368723, now seen corresponding path program 143 times [2021-06-05 07:02:55,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:55,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065943904] [2021-06-05 07:02:55,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:56,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:56,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065943904] [2021-06-05 07:02:56,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065943904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:56,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374776111] [2021-06-05 07:02:56,055 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 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 [2021-06-05 07:02:56,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:02:56,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:56,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:02:56,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:56,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:02:56,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:56,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:56,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:56,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:02:56,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:56,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374776111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:56,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:56,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:02:56,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473716819] [2021-06-05 07:02:56,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:02:56,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:56,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:02:56,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:02:56,416 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:57,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:57,447 INFO L93 Difference]: Finished difference Result 523 states and 1033 transitions. [2021-06-05 07:02:57,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:02:57,447 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:02:57,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:57,448 INFO L225 Difference]: With dead ends: 523 [2021-06-05 07:02:57,448 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 07:02:57,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1102.7ms TimeCoverageRelationStatistics Valid=274, Invalid=2276, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:02:57,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 07:02:57,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 409. [2021-06-05 07:02:57,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0098039215686274) internal successors, (820), 408 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:57,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 820 transitions. [2021-06-05 07:02:57,452 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 820 transitions. Word has length 30 [2021-06-05 07:02:57,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:57,452 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 820 transitions. [2021-06-05 07:02:57,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:57,452 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 820 transitions. [2021-06-05 07:02:57,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:57,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:57,452 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:57,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:57,653 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:57,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:57,653 INFO L82 PathProgramCache]: Analyzing trace with hash -837931855, now seen corresponding path program 144 times [2021-06-05 07:02:57,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:57,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463919658] [2021-06-05 07:02:57,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:57,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:57,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463919658] [2021-06-05 07:02:57,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463919658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:57,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583768510] [2021-06-05 07:02:57,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 07:02:57,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:02:57,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:57,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:57,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:57,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:02:58,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:58,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:58,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:58,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:02:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:58,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583768510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:58,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:58,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2021-06-05 07:02:58,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541761112] [2021-06-05 07:02:58,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:02:58,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:58,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:02:58,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:02:58,247 INFO L87 Difference]: Start difference. First operand 409 states and 820 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:59,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:59,347 INFO L93 Difference]: Finished difference Result 594 states and 1171 transitions. [2021-06-05 07:02:59,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:02:59,347 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:02:59,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:59,348 INFO L225 Difference]: With dead ends: 594 [2021-06-05 07:02:59,348 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 07:02:59,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 997.9ms TimeCoverageRelationStatistics Valid=281, Invalid=2475, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:02:59,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 07:02:59,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 418. [2021-06-05 07:02:59,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.0047961630695443) internal successors, (836), 417 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 836 transitions. [2021-06-05 07:02:59,353 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 836 transitions. Word has length 30 [2021-06-05 07:02:59,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:59,353 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 836 transitions. [2021-06-05 07:02:59,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:59,353 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 836 transitions. [2021-06-05 07:02:59,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:02:59,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:59,354 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:59,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 07:02:59,560 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:59,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:59,561 INFO L82 PathProgramCache]: Analyzing trace with hash 681106943, now seen corresponding path program 145 times [2021-06-05 07:02:59,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:59,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191021211] [2021-06-05 07:02:59,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:59,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:59,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191021211] [2021-06-05 07:02:59,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191021211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:59,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953079374] [2021-06-05 07:02:59,788 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 [2021-06-05 07:02:59,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:59,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:02:59,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:59,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:02:59,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:59,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:59,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:59,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:03:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:00,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953079374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:00,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:00,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:00,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723599098] [2021-06-05 07:03:00,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:00,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:00,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:00,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:00,149 INFO L87 Difference]: Start difference. First operand 418 states and 836 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:01,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:01,301 INFO L93 Difference]: Finished difference Result 602 states and 1183 transitions. [2021-06-05 07:03:01,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:03:01,301 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:01,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:01,301 INFO L225 Difference]: With dead ends: 602 [2021-06-05 07:03:01,302 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 07:03:01,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1070.5ms TimeCoverageRelationStatistics Valid=289, Invalid=2681, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:03:01,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 07:03:01,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 408. [2021-06-05 07:03:01,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.9950859950859952) internal successors, (812), 407 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:01,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 812 transitions. [2021-06-05 07:03:01,306 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 812 transitions. Word has length 30 [2021-06-05 07:03:01,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:01,306 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 812 transitions. [2021-06-05 07:03:01,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:01,306 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 812 transitions. [2021-06-05 07:03:01,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:01,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:01,306 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:01,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:01,507 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:01,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:01,507 INFO L82 PathProgramCache]: Analyzing trace with hash 50686535, now seen corresponding path program 146 times [2021-06-05 07:03:01,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:01,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960211507] [2021-06-05 07:03:01,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:01,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:01,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960211507] [2021-06-05 07:03:01,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960211507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:01,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235379618] [2021-06-05 07:03:01,742 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 [2021-06-05 07:03:01,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:03:01,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:01,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:01,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:01,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:03:01,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:01,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:01,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:01,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:03:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:02,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235379618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:02,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:02,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:02,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432073128] [2021-06-05 07:03:02,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:02,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:02,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:02,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:02,119 INFO L87 Difference]: Start difference. First operand 408 states and 812 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:03,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:03,022 INFO L93 Difference]: Finished difference Result 555 states and 1085 transitions. [2021-06-05 07:03:03,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:03:03,023 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:03,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:03,023 INFO L225 Difference]: With dead ends: 555 [2021-06-05 07:03:03,023 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 07:03:03,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 941.6ms TimeCoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:03:03,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 07:03:03,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 410. [2021-06-05 07:03:03,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9926650366748166) internal successors, (815), 409 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 815 transitions. [2021-06-05 07:03:03,027 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 815 transitions. Word has length 30 [2021-06-05 07:03:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:03,027 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 815 transitions. [2021-06-05 07:03:03,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:03,027 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 815 transitions. [2021-06-05 07:03:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:03,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:03,028 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:03,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 07:03:03,228 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:03,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:03,229 INFO L82 PathProgramCache]: Analyzing trace with hash 932752259, now seen corresponding path program 147 times [2021-06-05 07:03:03,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:03,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708172888] [2021-06-05 07:03:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:03,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:03,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708172888] [2021-06-05 07:03:03,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708172888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:03,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392198992] [2021-06-05 07:03:03,478 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 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 [2021-06-05 07:03:03,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:03:03,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:03,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:03,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:03,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:03:03,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:03,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:03,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:03,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:03:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:03,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392198992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:03,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:03,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:03,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144262851] [2021-06-05 07:03:03,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:03,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:03,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:03,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:03,880 INFO L87 Difference]: Start difference. First operand 410 states and 815 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:04,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:04,879 INFO L93 Difference]: Finished difference Result 471 states and 928 transitions. [2021-06-05 07:03:04,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:03:04,879 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:04,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:04,880 INFO L225 Difference]: With dead ends: 471 [2021-06-05 07:03:04,880 INFO L226 Difference]: Without dead ends: 448 [2021-06-05 07:03:04,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1101.6ms TimeCoverageRelationStatistics Valid=242, Invalid=2110, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:03:04,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-06-05 07:03:04,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 400. [2021-06-05 07:03:04,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0050125313283207) internal successors, (800), 399 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:04,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 800 transitions. [2021-06-05 07:03:04,883 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 800 transitions. Word has length 30 [2021-06-05 07:03:04,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:04,883 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 800 transitions. [2021-06-05 07:03:04,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:04,883 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 800 transitions. [2021-06-05 07:03:04,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:04,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:04,884 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:05,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:05,084 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:05,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:05,084 INFO L82 PathProgramCache]: Analyzing trace with hash 54744609, now seen corresponding path program 148 times [2021-06-05 07:03:05,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:05,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013532344] [2021-06-05 07:03:05,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:05,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:05,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013532344] [2021-06-05 07:03:05,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013532344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:05,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044809020] [2021-06-05 07:03:05,309 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 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 [2021-06-05 07:03:05,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:03:05,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:05,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:05,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:05,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:03:05,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:05,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:05,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:05,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:03:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:05,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044809020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:05,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:05,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:05,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070323617] [2021-06-05 07:03:05,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:05,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:05,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:05,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:05,688 INFO L87 Difference]: Start difference. First operand 400 states and 800 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:06,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:06,568 INFO L93 Difference]: Finished difference Result 549 states and 1081 transitions. [2021-06-05 07:03:06,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:03:06,569 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:06,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:06,569 INFO L225 Difference]: With dead ends: 549 [2021-06-05 07:03:06,569 INFO L226 Difference]: Without dead ends: 516 [2021-06-05 07:03:06,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 972.6ms TimeCoverageRelationStatistics Valid=218, Invalid=2038, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:03:06,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-06-05 07:03:06,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 396. [2021-06-05 07:03:06,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.007594936708861) internal successors, (793), 395 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:06,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 793 transitions. [2021-06-05 07:03:06,573 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 793 transitions. Word has length 30 [2021-06-05 07:03:06,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:06,573 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 793 transitions. [2021-06-05 07:03:06,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:06,573 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 793 transitions. [2021-06-05 07:03:06,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:06,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:06,573 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:06,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 07:03:06,774 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:06,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:06,774 INFO L82 PathProgramCache]: Analyzing trace with hash -114500857, now seen corresponding path program 149 times [2021-06-05 07:03:06,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:06,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31614751] [2021-06-05 07:03:06,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:07,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:07,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:07,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31614751] [2021-06-05 07:03:07,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31614751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:07,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136751379] [2021-06-05 07:03:07,048 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 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 [2021-06-05 07:03:07,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:03:07,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:07,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:03:07,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:07,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:03:07,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:07,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:07,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:07,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:03:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:07,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136751379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:07,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:07,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:07,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407621104] [2021-06-05 07:03:07,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:07,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:07,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:07,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:07,477 INFO L87 Difference]: Start difference. First operand 396 states and 793 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:08,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:08,457 INFO L93 Difference]: Finished difference Result 619 states and 1216 transitions. [2021-06-05 07:03:08,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:03:08,457 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:08,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:08,458 INFO L225 Difference]: With dead ends: 619 [2021-06-05 07:03:08,458 INFO L226 Difference]: Without dead ends: 610 [2021-06-05 07:03:08,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1025.2ms TimeCoverageRelationStatistics Valid=245, Invalid=2205, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:03:08,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-05 07:03:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 411. [2021-06-05 07:03:08,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0121951219512195) internal successors, (825), 410 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 825 transitions. [2021-06-05 07:03:08,462 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 825 transitions. Word has length 30 [2021-06-05 07:03:08,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:08,462 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 825 transitions. [2021-06-05 07:03:08,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:08,462 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 825 transitions. [2021-06-05 07:03:08,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:08,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:08,463 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:08,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:08,663 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:08,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:08,664 INFO L82 PathProgramCache]: Analyzing trace with hash 767564867, now seen corresponding path program 150 times [2021-06-05 07:03:08,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:08,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366280115] [2021-06-05 07:03:08,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:08,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:08,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366280115] [2021-06-05 07:03:08,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366280115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:08,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972244210] [2021-06-05 07:03:08,883 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 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 [2021-06-05 07:03:08,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:03:08,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:08,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:03:08,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:09,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:03:09,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:09,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:09,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:09,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:03:09,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:09,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972244210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:09,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:09,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:09,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808664033] [2021-06-05 07:03:09,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:09,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:09,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:09,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:09,235 INFO L87 Difference]: Start difference. First operand 411 states and 825 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:10,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:10,386 INFO L93 Difference]: Finished difference Result 527 states and 1042 transitions. [2021-06-05 07:03:10,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:03:10,386 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:10,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:10,387 INFO L225 Difference]: With dead ends: 527 [2021-06-05 07:03:10,387 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 07:03:10,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1062.5ms TimeCoverageRelationStatistics Valid=275, Invalid=2275, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:03:10,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 07:03:10,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 409. [2021-06-05 07:03:10,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0122549019607843) internal successors, (821), 408 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 821 transitions. [2021-06-05 07:03:10,391 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 821 transitions. Word has length 30 [2021-06-05 07:03:10,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:10,391 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 821 transitions. [2021-06-05 07:03:10,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:10,391 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 821 transitions. [2021-06-05 07:03:10,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:10,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:10,391 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:10,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:10,592 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:10,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:10,592 INFO L82 PathProgramCache]: Analyzing trace with hash -2058735711, now seen corresponding path program 151 times [2021-06-05 07:03:10,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:10,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378820152] [2021-06-05 07:03:10,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:10,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:10,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:10,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378820152] [2021-06-05 07:03:10,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378820152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:10,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559345015] [2021-06-05 07:03:10,808 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 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 [2021-06-05 07:03:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:10,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:10,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:10,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:03:10,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:10,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:10,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:10,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:03:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:11,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559345015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:11,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:11,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:03:11,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387660184] [2021-06-05 07:03:11,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:03:11,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:11,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:03:11,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:03:11,116 INFO L87 Difference]: Start difference. First operand 409 states and 821 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:12,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:12,215 INFO L93 Difference]: Finished difference Result 648 states and 1269 transitions. [2021-06-05 07:03:12,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:03:12,215 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:03:12,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:12,215 INFO L225 Difference]: With dead ends: 648 [2021-06-05 07:03:12,216 INFO L226 Difference]: Without dead ends: 631 [2021-06-05 07:03:12,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1026.4ms TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:03:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-05 07:03:12,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 418. [2021-06-05 07:03:12,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.0071942446043165) internal successors, (837), 417 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:12,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 837 transitions. [2021-06-05 07:03:12,220 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 837 transitions. Word has length 30 [2021-06-05 07:03:12,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:12,220 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 837 transitions. [2021-06-05 07:03:12,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:12,220 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 837 transitions. [2021-06-05 07:03:12,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:12,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:12,220 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:12,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:12,421 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:12,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:12,421 INFO L82 PathProgramCache]: Analyzing trace with hash -539696913, now seen corresponding path program 152 times [2021-06-05 07:03:12,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:12,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107543689] [2021-06-05 07:03:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:12,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:12,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:12,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107543689] [2021-06-05 07:03:12,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107543689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:12,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973083028] [2021-06-05 07:03:12,639 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 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 [2021-06-05 07:03:12,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:03:12,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:12,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:12,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:12,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:03:12,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:12,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:12,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:12,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:03:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:13,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973083028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:13,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:13,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 07:03:13,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451352605] [2021-06-05 07:03:13,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:03:13,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:13,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:03:13,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:03:13,010 INFO L87 Difference]: Start difference. First operand 418 states and 837 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:14,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:14,053 INFO L93 Difference]: Finished difference Result 623 states and 1225 transitions. [2021-06-05 07:03:14,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:03:14,054 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:03:14,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:14,054 INFO L225 Difference]: With dead ends: 623 [2021-06-05 07:03:14,054 INFO L226 Difference]: Without dead ends: 588 [2021-06-05 07:03:14,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 993.4ms TimeCoverageRelationStatistics Valid=294, Invalid=2676, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:03:14,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-05 07:03:14,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 408. [2021-06-05 07:03:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.9975429975429975) internal successors, (813), 407 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:14,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 813 transitions. [2021-06-05 07:03:14,060 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 813 transitions. Word has length 30 [2021-06-05 07:03:14,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:14,060 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 813 transitions. [2021-06-05 07:03:14,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:14,061 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 813 transitions. [2021-06-05 07:03:14,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:14,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:14,061 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:14,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:14,277 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:14,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:14,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1170117321, now seen corresponding path program 153 times [2021-06-05 07:03:14,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:14,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864990654] [2021-06-05 07:03:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:14,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:14,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864990654] [2021-06-05 07:03:14,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864990654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:14,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863755659] [2021-06-05 07:03:14,508 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 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 [2021-06-05 07:03:14,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:03:14,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:14,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:14,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:14,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:03:14,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:14,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:14,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:14,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:03:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:14,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863755659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:14,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:14,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:14,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504520708] [2021-06-05 07:03:14,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:14,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:14,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:14,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:14,955 INFO L87 Difference]: Start difference. First operand 408 states and 813 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:15,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:15,775 INFO L93 Difference]: Finished difference Result 574 states and 1124 transitions. [2021-06-05 07:03:15,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:03:15,776 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:15,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:15,776 INFO L225 Difference]: With dead ends: 574 [2021-06-05 07:03:15,776 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 07:03:15,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 960.7ms TimeCoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:03:15,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 07:03:15,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 410. [2021-06-05 07:03:15,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9951100244498778) internal successors, (816), 409 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:15,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 816 transitions. [2021-06-05 07:03:15,781 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 816 transitions. Word has length 30 [2021-06-05 07:03:15,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:15,781 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 816 transitions. [2021-06-05 07:03:15,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:15,781 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 816 transitions. [2021-06-05 07:03:15,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:15,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:15,782 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:15,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-06-05 07:03:15,982 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:15,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:15,982 INFO L82 PathProgramCache]: Analyzing trace with hash -288051597, now seen corresponding path program 154 times [2021-06-05 07:03:15,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:15,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003501576] [2021-06-05 07:03:15,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:16,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:16,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003501576] [2021-06-05 07:03:16,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003501576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:16,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282757380] [2021-06-05 07:03:16,217 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 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 [2021-06-05 07:03:16,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:03:16,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:16,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:16,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:16,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:03:16,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:16,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:16,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:16,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:03:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:16,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282757380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:16,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:16,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:16,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485247195] [2021-06-05 07:03:16,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:16,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:16,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:16,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:16,591 INFO L87 Difference]: Start difference. First operand 410 states and 816 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:17,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:17,488 INFO L93 Difference]: Finished difference Result 480 states and 947 transitions. [2021-06-05 07:03:17,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:03:17,488 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:17,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:17,488 INFO L225 Difference]: With dead ends: 480 [2021-06-05 07:03:17,488 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 07:03:17,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1056.8ms TimeCoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:03:17,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 07:03:17,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 400. [2021-06-05 07:03:17,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.007518796992481) internal successors, (801), 399 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:17,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 801 transitions. [2021-06-05 07:03:17,492 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 801 transitions. Word has length 30 [2021-06-05 07:03:17,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:17,492 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 801 transitions. [2021-06-05 07:03:17,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:17,492 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 801 transitions. [2021-06-05 07:03:17,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:17,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:17,493 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:17,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 07:03:17,693 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:17,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:17,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1166059247, now seen corresponding path program 155 times [2021-06-05 07:03:17,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:17,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416320948] [2021-06-05 07:03:17,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:17,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:17,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416320948] [2021-06-05 07:03:17,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416320948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:17,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770896367] [2021-06-05 07:03:17,917 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 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 [2021-06-05 07:03:17,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:03:17,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:17,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:17,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:18,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:03:18,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:18,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:18,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:18,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:03:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:18,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770896367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:18,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:18,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:18,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126950512] [2021-06-05 07:03:18,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:18,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:18,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:18,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:18,289 INFO L87 Difference]: Start difference. First operand 400 states and 801 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:19,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:19,147 INFO L93 Difference]: Finished difference Result 571 states and 1125 transitions. [2021-06-05 07:03:19,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:03:19,148 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:19,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:19,148 INFO L225 Difference]: With dead ends: 571 [2021-06-05 07:03:19,148 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 07:03:19,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 940.2ms TimeCoverageRelationStatistics Valid=220, Invalid=2036, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:03:19,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 07:03:19,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 397. [2021-06-05 07:03:19,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.01010101010101) internal successors, (796), 396 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:19,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 796 transitions. [2021-06-05 07:03:19,152 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 796 transitions. Word has length 30 [2021-06-05 07:03:19,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:19,152 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 796 transitions. [2021-06-05 07:03:19,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:19,152 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 796 transitions. [2021-06-05 07:03:19,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:19,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:19,153 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:19,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:19,353 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:19,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:19,354 INFO L82 PathProgramCache]: Analyzing trace with hash -679921743, now seen corresponding path program 156 times [2021-06-05 07:03:19,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:19,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712421211] [2021-06-05 07:03:19,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:19,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:19,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712421211] [2021-06-05 07:03:19,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712421211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:19,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453537139] [2021-06-05 07:03:19,589 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 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 [2021-06-05 07:03:19,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:03:19,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:19,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:19,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:19,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:03:19,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:19,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:19,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:19,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:03:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:19,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453537139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:19,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:19,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:19,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673431930] [2021-06-05 07:03:19,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:19,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:19,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:19,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:19,965 INFO L87 Difference]: Start difference. First operand 397 states and 796 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:20,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:20,710 INFO L93 Difference]: Finished difference Result 569 states and 1113 transitions. [2021-06-05 07:03:20,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:03:20,711 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:20,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:20,711 INFO L225 Difference]: With dead ends: 569 [2021-06-05 07:03:20,711 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 07:03:20,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 933.7ms TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:03:20,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 07:03:20,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 411. [2021-06-05 07:03:20,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:20,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2021-06-05 07:03:20,716 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2021-06-05 07:03:20,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:20,716 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2021-06-05 07:03:20,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:20,716 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2021-06-05 07:03:20,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:20,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:20,716 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:20,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 07:03:20,917 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:20,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:20,917 INFO L82 PathProgramCache]: Analyzing trace with hash 202143981, now seen corresponding path program 157 times [2021-06-05 07:03:20,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:20,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330773387] [2021-06-05 07:03:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:21,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:21,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330773387] [2021-06-05 07:03:21,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330773387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:21,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228637409] [2021-06-05 07:03:21,149 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 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 [2021-06-05 07:03:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:21,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:21,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:21,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:03:21,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:21,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:21,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:21,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:03:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:21,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228637409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:21,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:21,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:21,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324580904] [2021-06-05 07:03:21,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:21,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:21,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:21,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:21,526 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:22,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:22,574 INFO L93 Difference]: Finished difference Result 484 states and 955 transitions. [2021-06-05 07:03:22,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:03:22,575 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:22,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:22,575 INFO L225 Difference]: With dead ends: 484 [2021-06-05 07:03:22,575 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 07:03:22,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 1077.5ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:03:22,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 07:03:22,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 409. [2021-06-05 07:03:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0049019607843137) internal successors, (818), 408 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 818 transitions. [2021-06-05 07:03:22,579 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 818 transitions. Word has length 30 [2021-06-05 07:03:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:22,579 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 818 transitions. [2021-06-05 07:03:22,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:22,579 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 818 transitions. [2021-06-05 07:03:22,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:22,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:22,580 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:22,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 07:03:22,780 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:22,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:22,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1670810699, now seen corresponding path program 158 times [2021-06-05 07:03:22,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:22,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206628014] [2021-06-05 07:03:22,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:23,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:23,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206628014] [2021-06-05 07:03:23,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206628014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:23,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025427084] [2021-06-05 07:03:23,007 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 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 [2021-06-05 07:03:23,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:03:23,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:23,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:23,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:23,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:03:23,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:23,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:23,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:23,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:03:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:23,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025427084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:23,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:23,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:03:23,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846917120] [2021-06-05 07:03:23,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:03:23,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:23,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:03:23,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:03:23,342 INFO L87 Difference]: Start difference. First operand 409 states and 818 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:24,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:24,119 INFO L93 Difference]: Finished difference Result 568 states and 1115 transitions. [2021-06-05 07:03:24,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:03:24,119 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:03:24,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:24,120 INFO L225 Difference]: With dead ends: 568 [2021-06-05 07:03:24,120 INFO L226 Difference]: Without dead ends: 523 [2021-06-05 07:03:24,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 853.9ms TimeCoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:03:24,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-05 07:03:24,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 401. [2021-06-05 07:03:24,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.005) internal successors, (802), 400 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:24,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 802 transitions. [2021-06-05 07:03:24,124 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 802 transitions. Word has length 30 [2021-06-05 07:03:24,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:24,124 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 802 transitions. [2021-06-05 07:03:24,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:24,124 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 802 transitions. [2021-06-05 07:03:24,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:24,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:24,124 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:24,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 07:03:24,325 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:24,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:24,325 INFO L82 PathProgramCache]: Analyzing trace with hash -675863669, now seen corresponding path program 159 times [2021-06-05 07:03:24,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:24,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488588175] [2021-06-05 07:03:24,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:24,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:24,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488588175] [2021-06-05 07:03:24,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488588175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:24,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876874247] [2021-06-05 07:03:24,547 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 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 [2021-06-05 07:03:24,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:03:24,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:24,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:24,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:24,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:03:24,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:24,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:24,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:24,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:03:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:24,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876874247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:24,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:24,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:24,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239846490] [2021-06-05 07:03:24,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:24,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:24,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:24,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:24,920 INFO L87 Difference]: Start difference. First operand 401 states and 802 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:25,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:25,699 INFO L93 Difference]: Finished difference Result 551 states and 1084 transitions. [2021-06-05 07:03:25,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:03:25,700 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:25,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:25,700 INFO L225 Difference]: With dead ends: 551 [2021-06-05 07:03:25,700 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 07:03:25,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 888.3ms TimeCoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:03:25,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 07:03:25,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 399. [2021-06-05 07:03:25,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.0050251256281406) internal successors, (798), 398 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:25,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 798 transitions. [2021-06-05 07:03:25,704 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 798 transitions. Word has length 30 [2021-06-05 07:03:25,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:25,704 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 798 transitions. [2021-06-05 07:03:25,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:25,704 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 798 transitions. [2021-06-05 07:03:25,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:25,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:25,705 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:25,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:25,905 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:25,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:25,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1279594887, now seen corresponding path program 160 times [2021-06-05 07:03:25,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:25,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711604207] [2021-06-05 07:03:25,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:26,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:26,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711604207] [2021-06-05 07:03:26,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711604207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:26,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381334312] [2021-06-05 07:03:26,160 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 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 [2021-06-05 07:03:26,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:03:26,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:26,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:26,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:26,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:03:26,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:26,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:26,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:26,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:03:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:26,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381334312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:26,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:26,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 07:03:26,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405708249] [2021-06-05 07:03:26,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:03:26,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:26,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:03:26,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:03:26,574 INFO L87 Difference]: Start difference. First operand 399 states and 798 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:27,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:27,310 INFO L93 Difference]: Finished difference Result 549 states and 1080 transitions. [2021-06-05 07:03:27,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:03:27,311 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:03:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:27,311 INFO L225 Difference]: With dead ends: 549 [2021-06-05 07:03:27,311 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 07:03:27,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 988.5ms TimeCoverageRelationStatistics Valid=219, Invalid=2231, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:03:27,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 07:03:27,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 394. [2021-06-05 07:03:27,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.0076335877862594) internal successors, (789), 393 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 789 transitions. [2021-06-05 07:03:27,315 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 789 transitions. Word has length 30 [2021-06-05 07:03:27,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:27,315 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 789 transitions. [2021-06-05 07:03:27,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:27,315 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 789 transitions. [2021-06-05 07:03:27,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:27,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:27,315 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:27,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 07:03:27,516 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:27,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:27,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1557539871, now seen corresponding path program 161 times [2021-06-05 07:03:27,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:27,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999013539] [2021-06-05 07:03:27,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:27,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:27,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999013539] [2021-06-05 07:03:27,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999013539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:27,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644097101] [2021-06-05 07:03:27,749 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 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 [2021-06-05 07:03:27,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:03:27,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:27,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:03:27,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:27,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:03:27,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:27,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:27,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:27,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:03:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:28,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644097101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:28,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:28,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:28,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112749616] [2021-06-05 07:03:28,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:28,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:28,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:28,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:28,123 INFO L87 Difference]: Start difference. First operand 394 states and 789 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:28,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:28,963 INFO L93 Difference]: Finished difference Result 580 states and 1141 transitions. [2021-06-05 07:03:28,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:03:28,964 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:28,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:28,964 INFO L225 Difference]: With dead ends: 580 [2021-06-05 07:03:28,964 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 07:03:28,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 910.1ms TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:03:28,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 07:03:28,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 415. [2021-06-05 07:03:28,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.004830917874396) internal successors, (830), 414 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:28,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 830 transitions. [2021-06-05 07:03:28,968 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 830 transitions. Word has length 30 [2021-06-05 07:03:28,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:28,969 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 830 transitions. [2021-06-05 07:03:28,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:28,969 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 830 transitions. [2021-06-05 07:03:28,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:28,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:28,969 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:29,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:29,170 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:29,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:29,170 INFO L82 PathProgramCache]: Analyzing trace with hash -675474147, now seen corresponding path program 162 times [2021-06-05 07:03:29,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:29,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782147425] [2021-06-05 07:03:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:29,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:29,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782147425] [2021-06-05 07:03:29,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782147425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:29,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891837718] [2021-06-05 07:03:29,404 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 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 [2021-06-05 07:03:29,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:03:29,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:29,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:03:29,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:29,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:03:29,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:29,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:29,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:29,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:03:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:29,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891837718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:29,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:29,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:29,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685172034] [2021-06-05 07:03:29,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:29,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:29,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:29,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:29,780 INFO L87 Difference]: Start difference. First operand 415 states and 830 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:30,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:30,818 INFO L93 Difference]: Finished difference Result 503 states and 999 transitions. [2021-06-05 07:03:30,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:03:30,818 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:30,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:30,819 INFO L225 Difference]: With dead ends: 503 [2021-06-05 07:03:30,819 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 07:03:30,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1051.8ms TimeCoverageRelationStatistics Valid=258, Invalid=2192, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:03:30,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 07:03:30,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 413. [2021-06-05 07:03:30,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:30,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2021-06-05 07:03:30,822 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2021-06-05 07:03:30,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:30,822 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2021-06-05 07:03:30,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2021-06-05 07:03:30,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:30,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:30,823 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:31,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:31,023 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:31,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:31,024 INFO L82 PathProgramCache]: Analyzing trace with hash 793192571, now seen corresponding path program 163 times [2021-06-05 07:03:31,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:31,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021836313] [2021-06-05 07:03:31,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:31,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:31,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021836313] [2021-06-05 07:03:31,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021836313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:31,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432944959] [2021-06-05 07:03:31,247 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 [2021-06-05 07:03:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:31,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:31,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:31,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:03:31,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:31,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:31,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:31,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:03:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:31,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432944959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:31,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:31,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:03:31,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266740857] [2021-06-05 07:03:31,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:03:31,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:31,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:03:31,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:03:31,585 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:32,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:32,405 INFO L93 Difference]: Finished difference Result 565 states and 1113 transitions. [2021-06-05 07:03:32,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:03:32,405 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:03:32,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:32,406 INFO L225 Difference]: With dead ends: 565 [2021-06-05 07:03:32,406 INFO L226 Difference]: Without dead ends: 548 [2021-06-05 07:03:32,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 857.2ms TimeCoverageRelationStatistics Valid=214, Invalid=1856, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:03:32,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-06-05 07:03:32,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 412. [2021-06-05 07:03:32,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.004866180048662) internal successors, (824), 411 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:32,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 824 transitions. [2021-06-05 07:03:32,410 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 824 transitions. Word has length 30 [2021-06-05 07:03:32,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:32,410 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 824 transitions. [2021-06-05 07:03:32,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:32,410 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 824 transitions. [2021-06-05 07:03:32,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:32,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:32,411 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:32,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:32,611 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:32,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:32,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1982735927, now seen corresponding path program 164 times [2021-06-05 07:03:32,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:32,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193478325] [2021-06-05 07:03:32,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:32,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:32,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193478325] [2021-06-05 07:03:32,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193478325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:32,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542170402] [2021-06-05 07:03:32,844 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 [2021-06-05 07:03:32,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:03:32,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:32,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:32,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:32,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:03:32,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:32,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:32,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:32,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:03:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:33,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542170402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:33,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:33,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 07:03:33,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299103828] [2021-06-05 07:03:33,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:03:33,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:33,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:03:33,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:03:33,247 INFO L87 Difference]: Start difference. First operand 412 states and 824 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:34,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:34,128 INFO L93 Difference]: Finished difference Result 567 states and 1116 transitions. [2021-06-05 07:03:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:03:34,128 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:03:34,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:34,129 INFO L225 Difference]: With dead ends: 567 [2021-06-05 07:03:34,129 INFO L226 Difference]: Without dead ends: 526 [2021-06-05 07:03:34,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 933.7ms TimeCoverageRelationStatistics Valid=254, Invalid=2296, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:03:34,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-05 07:03:34,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 399. [2021-06-05 07:03:34,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.007537688442211) internal successors, (799), 398 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:34,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 799 transitions. [2021-06-05 07:03:34,133 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 799 transitions. Word has length 30 [2021-06-05 07:03:34,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:34,133 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 799 transitions. [2021-06-05 07:03:34,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:34,133 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 799 transitions. [2021-06-05 07:03:34,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:34,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:34,134 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:34,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:34,341 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:34,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:34,341 INFO L82 PathProgramCache]: Analyzing trace with hash 439869191, now seen corresponding path program 165 times [2021-06-05 07:03:34,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:34,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341961552] [2021-06-05 07:03:34,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:34,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:34,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:34,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341961552] [2021-06-05 07:03:34,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341961552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:34,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527495068] [2021-06-05 07:03:34,588 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 [2021-06-05 07:03:34,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:03:34,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:34,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:34,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:34,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:03:34,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:34,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:34,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:34,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:03:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:35,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527495068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:35,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:35,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 07:03:35,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392846017] [2021-06-05 07:03:35,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:03:35,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:35,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:03:35,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:03:35,002 INFO L87 Difference]: Start difference. First operand 399 states and 799 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:36,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:36,165 INFO L93 Difference]: Finished difference Result 607 states and 1191 transitions. [2021-06-05 07:03:36,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:03:36,165 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:03:36,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:36,166 INFO L225 Difference]: With dead ends: 607 [2021-06-05 07:03:36,166 INFO L226 Difference]: Without dead ends: 598 [2021-06-05 07:03:36,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1089.6ms TimeCoverageRelationStatistics Valid=291, Invalid=2789, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:03:36,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-06-05 07:03:36,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 413. [2021-06-05 07:03:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0097087378640777) internal successors, (828), 412 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:36,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 828 transitions. [2021-06-05 07:03:36,172 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 828 transitions. Word has length 30 [2021-06-05 07:03:36,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:36,172 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 828 transitions. [2021-06-05 07:03:36,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:36,172 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 828 transitions. [2021-06-05 07:03:36,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:36,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:36,173 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:36,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 07:03:36,389 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:36,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:36,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1321934915, now seen corresponding path program 166 times [2021-06-05 07:03:36,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:36,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431917272] [2021-06-05 07:03:36,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:36,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:36,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431917272] [2021-06-05 07:03:36,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431917272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:36,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583731367] [2021-06-05 07:03:36,625 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 [2021-06-05 07:03:36,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:03:36,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:36,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:36,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:36,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:03:36,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:36,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:36,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:36,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:03:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:37,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583731367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:37,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:37,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:37,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563782339] [2021-06-05 07:03:37,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:37,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:37,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:37,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:37,069 INFO L87 Difference]: Start difference. First operand 413 states and 828 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:38,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:38,337 INFO L93 Difference]: Finished difference Result 520 states and 1027 transitions. [2021-06-05 07:03:38,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:03:38,337 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:38,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:38,338 INFO L225 Difference]: With dead ends: 520 [2021-06-05 07:03:38,338 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 07:03:38,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1295.7ms TimeCoverageRelationStatistics Valid=286, Invalid=2470, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:03:38,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 07:03:38,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 411. [2021-06-05 07:03:38,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:38,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2021-06-05 07:03:38,342 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2021-06-05 07:03:38,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:38,342 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2021-06-05 07:03:38,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:38,342 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2021-06-05 07:03:38,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:38,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:38,342 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:38,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 07:03:38,543 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:38,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:38,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1504365663, now seen corresponding path program 167 times [2021-06-05 07:03:38,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:38,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499934038] [2021-06-05 07:03:38,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:38,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:38,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499934038] [2021-06-05 07:03:38,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499934038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:38,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165076071] [2021-06-05 07:03:38,790 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 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 [2021-06-05 07:03:38,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:03:38,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:38,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:03:38,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:38,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:03:38,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:38,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:38,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:38,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:03:39,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:39,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165076071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:39,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:39,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:03:39,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133198605] [2021-06-05 07:03:39,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:03:39,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:39,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:03:39,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:03:39,184 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:40,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:40,224 INFO L93 Difference]: Finished difference Result 604 states and 1188 transitions. [2021-06-05 07:03:40,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:03:40,225 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:03:40,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:40,225 INFO L225 Difference]: With dead ends: 604 [2021-06-05 07:03:40,225 INFO L226 Difference]: Without dead ends: 587 [2021-06-05 07:03:40,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1167.9ms TimeCoverageRelationStatistics Valid=268, Invalid=2488, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:03:40,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-06-05 07:03:40,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 420. [2021-06-05 07:03:40,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.0047732696897373) internal successors, (840), 419 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:40,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 840 transitions. [2021-06-05 07:03:40,230 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 840 transitions. Word has length 30 [2021-06-05 07:03:40,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:40,230 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 840 transitions. [2021-06-05 07:03:40,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:40,230 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 840 transitions. [2021-06-05 07:03:40,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:40,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:40,230 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:40,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 07:03:40,431 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:40,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:40,431 INFO L82 PathProgramCache]: Analyzing trace with hash 14673135, now seen corresponding path program 168 times [2021-06-05 07:03:40,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:40,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415673414] [2021-06-05 07:03:40,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:40,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:40,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415673414] [2021-06-05 07:03:40,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415673414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:40,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836488808] [2021-06-05 07:03:40,661 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 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 [2021-06-05 07:03:40,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:03:40,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:40,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:40,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:40,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:03:40,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:40,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:40,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:40,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:03:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:41,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836488808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:41,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:41,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 07:03:41,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938449420] [2021-06-05 07:03:41,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:03:41,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:41,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:03:41,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:03:41,078 INFO L87 Difference]: Start difference. First operand 420 states and 840 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:42,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:42,138 INFO L93 Difference]: Finished difference Result 591 states and 1164 transitions. [2021-06-05 07:03:42,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:03:42,138 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:03:42,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:42,139 INFO L225 Difference]: With dead ends: 591 [2021-06-05 07:03:42,139 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 07:03:42,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1084.5ms TimeCoverageRelationStatistics Valid=297, Invalid=2783, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:03:42,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 07:03:42,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 410. [2021-06-05 07:03:42,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9951100244498778) internal successors, (816), 409 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:42,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 816 transitions. [2021-06-05 07:03:42,143 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 816 transitions. Word has length 30 [2021-06-05 07:03:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:42,143 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 816 transitions. [2021-06-05 07:03:42,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:42,144 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 816 transitions. [2021-06-05 07:03:42,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:42,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:42,144 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:42,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:42,344 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:42,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:42,345 INFO L82 PathProgramCache]: Analyzing trace with hash -615747273, now seen corresponding path program 169 times [2021-06-05 07:03:42,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:42,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873083898] [2021-06-05 07:03:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:42,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:42,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873083898] [2021-06-05 07:03:42,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873083898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:42,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999702373] [2021-06-05 07:03:42,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 07:03:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:42,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:42,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:42,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:03:42,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:42,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:42,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:42,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:03:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:42,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999702373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:42,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:42,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:42,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323855283] [2021-06-05 07:03:42,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:42,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:42,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:42,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:42,966 INFO L87 Difference]: Start difference. First operand 410 states and 816 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:43,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:43,876 INFO L93 Difference]: Finished difference Result 556 states and 1087 transitions. [2021-06-05 07:03:43,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:03:43,876 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:43,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:43,876 INFO L225 Difference]: With dead ends: 556 [2021-06-05 07:03:43,876 INFO L226 Difference]: Without dead ends: 547 [2021-06-05 07:03:43,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 952.1ms TimeCoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:03:43,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-05 07:03:43,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 412. [2021-06-05 07:03:43,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.9927007299270072) internal successors, (819), 411 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 819 transitions. [2021-06-05 07:03:43,880 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 819 transitions. Word has length 30 [2021-06-05 07:03:43,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:43,880 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 819 transitions. [2021-06-05 07:03:43,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:43,881 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 819 transitions. [2021-06-05 07:03:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:43,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:43,881 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:44,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:44,081 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:44,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:44,082 INFO L82 PathProgramCache]: Analyzing trace with hash 266318451, now seen corresponding path program 170 times [2021-06-05 07:03:44,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:44,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690746498] [2021-06-05 07:03:44,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:44,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:44,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690746498] [2021-06-05 07:03:44,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690746498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:44,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010295978] [2021-06-05 07:03:44,319 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 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 [2021-06-05 07:03:44,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:03:44,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:44,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:44,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:44,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:03:44,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:44,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:44,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:44,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:03:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:44,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010295978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:44,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:44,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:44,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981972115] [2021-06-05 07:03:44,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:44,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:44,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:44,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:44,710 INFO L87 Difference]: Start difference. First operand 412 states and 819 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:45,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:45,717 INFO L93 Difference]: Finished difference Result 467 states and 920 transitions. [2021-06-05 07:03:45,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:03:45,717 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:45,718 INFO L225 Difference]: With dead ends: 467 [2021-06-05 07:03:45,718 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 07:03:45,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1093.3ms TimeCoverageRelationStatistics Valid=242, Invalid=2110, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:03:45,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 07:03:45,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 402. [2021-06-05 07:03:45,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0049875311720697) internal successors, (804), 401 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:45,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 804 transitions. [2021-06-05 07:03:45,721 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 804 transitions. Word has length 30 [2021-06-05 07:03:45,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:45,721 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 804 transitions. [2021-06-05 07:03:45,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:45,721 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 804 transitions. [2021-06-05 07:03:45,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:45,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:45,722 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:45,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:45,931 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:45,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:45,931 INFO L82 PathProgramCache]: Analyzing trace with hash -611689199, now seen corresponding path program 171 times [2021-06-05 07:03:45,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:45,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422369077] [2021-06-05 07:03:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:46,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:46,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422369077] [2021-06-05 07:03:46,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422369077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:46,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489190069] [2021-06-05 07:03:46,157 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 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 [2021-06-05 07:03:46,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:03:46,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:46,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:03:46,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:46,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:03:46,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:46,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:46,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:46,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 07:03:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:46,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489190069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:46,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:46,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:46,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896098485] [2021-06-05 07:03:46,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:46,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:46,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:46,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:46,550 INFO L87 Difference]: Start difference. First operand 402 states and 804 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:47,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:47,440 INFO L93 Difference]: Finished difference Result 550 states and 1083 transitions. [2021-06-05 07:03:47,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:03:47,441 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:47,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:47,441 INFO L225 Difference]: With dead ends: 550 [2021-06-05 07:03:47,441 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 07:03:47,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 970.4ms TimeCoverageRelationStatistics Valid=218, Invalid=2038, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:03:47,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 07:03:47,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 398. [2021-06-05 07:03:47,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.0075566750629723) internal successors, (797), 397 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 797 transitions. [2021-06-05 07:03:47,445 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 797 transitions. Word has length 30 [2021-06-05 07:03:47,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:47,446 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 797 transitions. [2021-06-05 07:03:47,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 797 transitions. [2021-06-05 07:03:47,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:47,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:47,446 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:47,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:47,647 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:47,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:47,647 INFO L82 PathProgramCache]: Analyzing trace with hash -780934665, now seen corresponding path program 172 times [2021-06-05 07:03:47,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:47,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807317739] [2021-06-05 07:03:47,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:47,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:47,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807317739] [2021-06-05 07:03:47,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807317739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:47,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439542602] [2021-06-05 07:03:47,881 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 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 [2021-06-05 07:03:47,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:03:47,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:47,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:47,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:48,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:03:48,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:48,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:48,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:48,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:03:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:48,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439542602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:48,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:48,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:48,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995364235] [2021-06-05 07:03:48,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:48,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:48,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:48,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:48,248 INFO L87 Difference]: Start difference. First operand 398 states and 797 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:49,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:49,315 INFO L93 Difference]: Finished difference Result 621 states and 1220 transitions. [2021-06-05 07:03:49,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:03:49,316 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:49,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:49,316 INFO L225 Difference]: With dead ends: 621 [2021-06-05 07:03:49,316 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 07:03:49,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1023.5ms TimeCoverageRelationStatistics Valid=252, Invalid=2400, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:03:49,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 07:03:49,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 413. [2021-06-05 07:03:49,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.012135922330097) internal successors, (829), 412 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:49,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 829 transitions. [2021-06-05 07:03:49,322 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 829 transitions. Word has length 30 [2021-06-05 07:03:49,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:49,322 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 829 transitions. [2021-06-05 07:03:49,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:49,323 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 829 transitions. [2021-06-05 07:03:49,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:49,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:49,323 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:49,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:49,537 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:49,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:49,537 INFO L82 PathProgramCache]: Analyzing trace with hash 101131059, now seen corresponding path program 173 times [2021-06-05 07:03:49,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:49,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352400288] [2021-06-05 07:03:49,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:49,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:49,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352400288] [2021-06-05 07:03:49,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352400288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:49,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866480084] [2021-06-05 07:03:49,768 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 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 [2021-06-05 07:03:49,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:03:49,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:49,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:03:49,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:49,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:03:49,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:49,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:49,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:49,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:03:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:50,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866480084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:50,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:50,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:50,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278233351] [2021-06-05 07:03:50,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:50,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:50,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:50,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:50,232 INFO L87 Difference]: Start difference. First operand 413 states and 829 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:51,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:51,487 INFO L93 Difference]: Finished difference Result 528 states and 1044 transitions. [2021-06-05 07:03:51,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:03:51,488 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:51,488 INFO L225 Difference]: With dead ends: 528 [2021-06-05 07:03:51,488 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 07:03:51,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1258.7ms TimeCoverageRelationStatistics Valid=286, Invalid=2470, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:03:51,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 07:03:51,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 411. [2021-06-05 07:03:51,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0121951219512195) internal successors, (825), 410 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:51,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 825 transitions. [2021-06-05 07:03:51,492 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 825 transitions. Word has length 30 [2021-06-05 07:03:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:51,492 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 825 transitions. [2021-06-05 07:03:51,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:51,492 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 825 transitions. [2021-06-05 07:03:51,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:51,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:51,493 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:51,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:51,693 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:51,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:51,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1569797777, now seen corresponding path program 174 times [2021-06-05 07:03:51,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:51,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555718169] [2021-06-05 07:03:51,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:51,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:51,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555718169] [2021-06-05 07:03:51,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555718169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:51,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74975399] [2021-06-05 07:03:51,944 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 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 [2021-06-05 07:03:51,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:03:51,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:51,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:51,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:52,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:03:52,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:52,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:52,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:52,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:03:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:52,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74975399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:52,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:52,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2021-06-05 07:03:52,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719936426] [2021-06-05 07:03:52,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:52,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:52,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:52,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:52,313 INFO L87 Difference]: Start difference. First operand 411 states and 825 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:53,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:53,531 INFO L93 Difference]: Finished difference Result 626 states and 1232 transitions. [2021-06-05 07:03:53,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:03:53,532 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:53,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:53,532 INFO L225 Difference]: With dead ends: 626 [2021-06-05 07:03:53,532 INFO L226 Difference]: Without dead ends: 609 [2021-06-05 07:03:53,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1055.4ms TimeCoverageRelationStatistics Valid=284, Invalid=2578, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:03:53,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-06-05 07:03:53,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 420. [2021-06-05 07:03:53,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.007159904534606) internal successors, (841), 419 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:53,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 841 transitions. [2021-06-05 07:03:53,537 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 841 transitions. Word has length 30 [2021-06-05 07:03:53,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:53,537 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 841 transitions. [2021-06-05 07:03:53,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:53,537 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 841 transitions. [2021-06-05 07:03:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:53,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:53,537 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:53,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:53,738 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:53,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:53,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1206130721, now seen corresponding path program 175 times [2021-06-05 07:03:53,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:53,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261230346] [2021-06-05 07:03:53,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:53,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:53,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:53,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261230346] [2021-06-05 07:03:53,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261230346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:53,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796276267] [2021-06-05 07:03:53,968 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 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 [2021-06-05 07:03:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:53,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:53,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:54,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:03:54,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:54,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:54,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:54,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:03:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:54,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796276267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:54,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:54,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:54,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001282411] [2021-06-05 07:03:54,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:54,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:54,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:54,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:54,326 INFO L87 Difference]: Start difference. First operand 420 states and 841 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:55,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:55,487 INFO L93 Difference]: Finished difference Result 648 states and 1268 transitions. [2021-06-05 07:03:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:03:55,488 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:55,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:55,488 INFO L225 Difference]: With dead ends: 648 [2021-06-05 07:03:55,488 INFO L226 Difference]: Without dead ends: 604 [2021-06-05 07:03:55,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1070.2ms TimeCoverageRelationStatistics Valid=283, Invalid=2687, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:03:55,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-05 07:03:55,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 410. [2021-06-05 07:03:55,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9975550122249388) internal successors, (817), 409 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:55,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 817 transitions. [2021-06-05 07:03:55,493 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 817 transitions. Word has length 30 [2021-06-05 07:03:55,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:55,493 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 817 transitions. [2021-06-05 07:03:55,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:55,493 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 817 transitions. [2021-06-05 07:03:55,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:55,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:55,493 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:55,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:55,694 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:55,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:55,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1836551129, now seen corresponding path program 176 times [2021-06-05 07:03:55,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:55,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36630525] [2021-06-05 07:03:55,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:55,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:55,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36630525] [2021-06-05 07:03:55,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36630525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:55,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18329836] [2021-06-05 07:03:55,926 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 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 [2021-06-05 07:03:55,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:03:55,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:55,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:55,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:56,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:03:56,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:56,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:56,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:56,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:03:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:56,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18329836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:56,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:56,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:56,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68427456] [2021-06-05 07:03:56,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:56,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:56,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:56,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:56,309 INFO L87 Difference]: Start difference. First operand 410 states and 817 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:57,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:57,231 INFO L93 Difference]: Finished difference Result 575 states and 1126 transitions. [2021-06-05 07:03:57,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:03:57,232 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:57,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:57,232 INFO L225 Difference]: With dead ends: 575 [2021-06-05 07:03:57,232 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 07:03:57,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 913.2ms TimeCoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:03:57,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 07:03:57,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 412. [2021-06-05 07:03:57,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.9951338199513382) internal successors, (820), 411 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:57,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 820 transitions. [2021-06-05 07:03:57,237 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 820 transitions. Word has length 30 [2021-06-05 07:03:57,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:57,237 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 820 transitions. [2021-06-05 07:03:57,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:57,237 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 820 transitions. [2021-06-05 07:03:57,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:57,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:57,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:57,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:57,438 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:57,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:57,438 INFO L82 PathProgramCache]: Analyzing trace with hash -954485405, now seen corresponding path program 177 times [2021-06-05 07:03:57,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:57,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789762349] [2021-06-05 07:03:57,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:57,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:57,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789762349] [2021-06-05 07:03:57,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789762349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:57,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336608543] [2021-06-05 07:03:57,694 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 [2021-06-05 07:03:57,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:03:57,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:57,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:57,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:57,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:03:57,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:57,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:57,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:57,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:03:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:58,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336608543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:58,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:58,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:58,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270317639] [2021-06-05 07:03:58,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:58,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:58,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:58,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:58,147 INFO L87 Difference]: Start difference. First operand 412 states and 820 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:59,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:59,110 INFO L93 Difference]: Finished difference Result 479 states and 945 transitions. [2021-06-05 07:03:59,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:03:59,110 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:03:59,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:59,111 INFO L225 Difference]: With dead ends: 479 [2021-06-05 07:03:59,111 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 07:03:59,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1119.4ms TimeCoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:03:59,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 07:03:59,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 402. [2021-06-05 07:03:59,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:59,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2021-06-05 07:03:59,114 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2021-06-05 07:03:59,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:59,114 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2021-06-05 07:03:59,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:59,114 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2021-06-05 07:03:59,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:03:59,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:59,115 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:59,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 07:03:59,315 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:59,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:59,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1832493055, now seen corresponding path program 178 times [2021-06-05 07:03:59,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:59,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185412034] [2021-06-05 07:03:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:59,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:59,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:59,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185412034] [2021-06-05 07:03:59,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185412034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:59,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797432080] [2021-06-05 07:03:59,542 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 [2021-06-05 07:03:59,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:03:59,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:59,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:03:59,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:59,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:03:59,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:59,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:59,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:03:59,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:03:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:59,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797432080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:59,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:59,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:03:59,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563788173] [2021-06-05 07:03:59,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:59,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:59,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:59,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:59,920 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:00,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:00,805 INFO L93 Difference]: Finished difference Result 572 states and 1127 transitions. [2021-06-05 07:04:00,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:04:00,805 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:04:00,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:00,806 INFO L225 Difference]: With dead ends: 572 [2021-06-05 07:04:00,806 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 07:04:00,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 938.6ms TimeCoverageRelationStatistics Valid=220, Invalid=2036, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:04:00,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 07:04:00,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 399. [2021-06-05 07:04:00,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.0100502512562812) internal successors, (800), 398 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:00,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 800 transitions. [2021-06-05 07:04:00,810 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 800 transitions. Word has length 30 [2021-06-05 07:04:00,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:00,810 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 800 transitions. [2021-06-05 07:04:00,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:00,810 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 800 transitions. [2021-06-05 07:04:00,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:00,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:00,810 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:01,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:01,012 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:01,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:01,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1346355551, now seen corresponding path program 179 times [2021-06-05 07:04:01,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:01,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244007739] [2021-06-05 07:04:01,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:01,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:01,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244007739] [2021-06-05 07:04:01,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244007739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:01,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315431221] [2021-06-05 07:04:01,262 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 [2021-06-05 07:04:01,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:01,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:01,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:01,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:01,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:04:01,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:01,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:01,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:01,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:04:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:01,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315431221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:01,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:01,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:04:01,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237511994] [2021-06-05 07:04:01,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:04:01,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:01,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:04:01,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:01,698 INFO L87 Difference]: Start difference. First operand 399 states and 800 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:02,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:02,596 INFO L93 Difference]: Finished difference Result 570 states and 1115 transitions. [2021-06-05 07:04:02,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:04:02,596 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:04:02,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:02,597 INFO L225 Difference]: With dead ends: 570 [2021-06-05 07:04:02,597 INFO L226 Difference]: Without dead ends: 561 [2021-06-05 07:04:02,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 966.4ms TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:04:02,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-05 07:04:02,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 413. [2021-06-05 07:04:02,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2021-06-05 07:04:02,601 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2021-06-05 07:04:02,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:02,601 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2021-06-05 07:04:02,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:02,602 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2021-06-05 07:04:02,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:02,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:02,602 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:02,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-06-05 07:04:02,805 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:02,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:02,805 INFO L82 PathProgramCache]: Analyzing trace with hash -464289827, now seen corresponding path program 180 times [2021-06-05 07:04:02,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:02,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329133880] [2021-06-05 07:04:02,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:03,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:03,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329133880] [2021-06-05 07:04:03,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329133880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:03,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938374067] [2021-06-05 07:04:03,040 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 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 [2021-06-05 07:04:03,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:04:03,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:03,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:03,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:03,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:04:03,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:03,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:03,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:03,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:04:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:03,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938374067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:03,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:03,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:04:03,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681153968] [2021-06-05 07:04:03,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:04:03,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:03,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:04:03,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:03,447 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:04,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:04,464 INFO L93 Difference]: Finished difference Result 484 states and 955 transitions. [2021-06-05 07:04:04,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:04:04,464 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:04:04,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:04,465 INFO L225 Difference]: With dead ends: 484 [2021-06-05 07:04:04,465 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 07:04:04,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1077.3ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:04:04,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 07:04:04,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 411. [2021-06-05 07:04:04,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:04,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2021-06-05 07:04:04,469 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2021-06-05 07:04:04,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:04,469 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2021-06-05 07:04:04,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:04,469 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2021-06-05 07:04:04,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:04,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:04,469 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:04,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:04,670 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:04,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:04,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1004376891, now seen corresponding path program 181 times [2021-06-05 07:04:04,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:04,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392016962] [2021-06-05 07:04:04,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:04,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:04,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392016962] [2021-06-05 07:04:04,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392016962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:04,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053178924] [2021-06-05 07:04:04,901 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 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 [2021-06-05 07:04:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:04,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:04,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:05,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:04:05,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:05,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:05,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:05,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:04:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:05,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053178924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:05,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:05,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:04:05,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476391675] [2021-06-05 07:04:05,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:04:05,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:05,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:04:05,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:04:05,230 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:06,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:06,008 INFO L93 Difference]: Finished difference Result 569 states and 1117 transitions. [2021-06-05 07:04:06,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:04:06,009 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:04:06,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:06,009 INFO L225 Difference]: With dead ends: 569 [2021-06-05 07:04:06,009 INFO L226 Difference]: Without dead ends: 524 [2021-06-05 07:04:06,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 847.9ms TimeCoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:04:06,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-05 07:04:06,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 403. [2021-06-05 07:04:06,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0049751243781095) internal successors, (806), 402 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:06,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 806 transitions. [2021-06-05 07:04:06,013 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 806 transitions. Word has length 30 [2021-06-05 07:04:06,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:06,013 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 806 transitions. [2021-06-05 07:04:06,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:06,013 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 806 transitions. [2021-06-05 07:04:06,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:06,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:06,014 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:06,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:06,214 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:06,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:06,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1342297477, now seen corresponding path program 182 times [2021-06-05 07:04:06,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:06,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146356203] [2021-06-05 07:04:06,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:06,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:06,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146356203] [2021-06-05 07:04:06,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146356203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:06,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055981657] [2021-06-05 07:04:06,441 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 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 [2021-06-05 07:04:06,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:06,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:06,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:06,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:06,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:04:06,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:06,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:06,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:06,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:04:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:06,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055981657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:06,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:06,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:04:06,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806968539] [2021-06-05 07:04:06,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:04:06,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:06,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:04:06,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:06,826 INFO L87 Difference]: Start difference. First operand 403 states and 806 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:07,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:07,540 INFO L93 Difference]: Finished difference Result 552 states and 1086 transitions. [2021-06-05 07:04:07,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:04:07,540 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:04:07,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:07,541 INFO L225 Difference]: With dead ends: 552 [2021-06-05 07:04:07,541 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 07:04:07,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 894.4ms TimeCoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:04:07,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 07:04:07,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 401. [2021-06-05 07:04:07,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.005) internal successors, (802), 400 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:07,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 802 transitions. [2021-06-05 07:04:07,545 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 802 transitions. Word has length 30 [2021-06-05 07:04:07,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:07,545 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 802 transitions. [2021-06-05 07:04:07,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:07,545 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 802 transitions. [2021-06-05 07:04:07,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:07,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:07,545 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:07,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 07:04:07,746 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:07,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:07,748 INFO L82 PathProgramCache]: Analyzing trace with hash 613161079, now seen corresponding path program 183 times [2021-06-05 07:04:07,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:07,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329311502] [2021-06-05 07:04:07,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:08,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:08,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329311502] [2021-06-05 07:04:08,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329311502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:08,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928567513] [2021-06-05 07:04:08,066 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:08,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:04:08,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:08,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:08,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:08,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:04:08,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:08,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:08,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:08,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:04:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:08,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928567513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:08,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:08,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 07:04:08,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510076470] [2021-06-05 07:04:08,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:04:08,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:08,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:04:08,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:04:08,500 INFO L87 Difference]: Start difference. First operand 401 states and 802 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:09,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:09,361 INFO L93 Difference]: Finished difference Result 550 states and 1082 transitions. [2021-06-05 07:04:09,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:04:09,362 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:04:09,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:09,362 INFO L225 Difference]: With dead ends: 550 [2021-06-05 07:04:09,362 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 07:04:09,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1067.7ms TimeCoverageRelationStatistics Valid=219, Invalid=2231, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:04:09,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 07:04:09,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 397. [2021-06-05 07:04:09,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:09,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2021-06-05 07:04:09,366 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2021-06-05 07:04:09,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:09,366 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2021-06-05 07:04:09,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:09,366 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2021-06-05 07:04:09,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:09,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:09,367 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:09,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:09,567 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:09,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:09,568 INFO L82 PathProgramCache]: Analyzing trace with hash 900146755, now seen corresponding path program 184 times [2021-06-05 07:04:09,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:09,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896051728] [2021-06-05 07:04:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:09,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:09,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896051728] [2021-06-05 07:04:09,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896051728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:09,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347318114] [2021-06-05 07:04:09,827 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 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 [2021-06-05 07:04:09,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:09,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:09,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:09,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:09,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:04:09,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:10,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:10,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:10,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:04:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:10,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347318114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:10,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:10,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:04:10,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168052398] [2021-06-05 07:04:10,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:04:10,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:10,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:04:10,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:10,207 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:11,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:11,442 INFO L93 Difference]: Finished difference Result 682 states and 1342 transitions. [2021-06-05 07:04:11,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:04:11,442 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:04:11,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:11,443 INFO L225 Difference]: With dead ends: 682 [2021-06-05 07:04:11,443 INFO L226 Difference]: Without dead ends: 673 [2021-06-05 07:04:11,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 1084.4ms TimeCoverageRelationStatistics Valid=256, Invalid=2500, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:04:11,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-06-05 07:04:11,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 415. [2021-06-05 07:04:11,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.0193236714975846) internal successors, (836), 414 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:11,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 836 transitions. [2021-06-05 07:04:11,447 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 836 transitions. Word has length 30 [2021-06-05 07:04:11,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:11,447 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 836 transitions. [2021-06-05 07:04:11,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:11,448 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 836 transitions. [2021-06-05 07:04:11,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:11,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:11,448 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:11,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:11,648 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:11,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:11,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1782212479, now seen corresponding path program 185 times [2021-06-05 07:04:11,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:11,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764987836] [2021-06-05 07:04:11,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:11,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:11,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764987836] [2021-06-05 07:04:11,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764987836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:11,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122848665] [2021-06-05 07:04:11,879 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 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 [2021-06-05 07:04:11,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:04:11,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:11,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:04:11,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:12,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:04:12,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:12,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:12,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:12,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:04:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:12,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122848665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:12,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:12,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:04:12,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633831962] [2021-06-05 07:04:12,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:04:12,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:12,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:04:12,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:12,257 INFO L87 Difference]: Start difference. First operand 415 states and 836 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:13,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:13,464 INFO L93 Difference]: Finished difference Result 576 states and 1138 transitions. [2021-06-05 07:04:13,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:04:13,465 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:04:13,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:13,465 INFO L225 Difference]: With dead ends: 576 [2021-06-05 07:04:13,465 INFO L226 Difference]: Without dead ends: 561 [2021-06-05 07:04:13,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1213.0ms TimeCoverageRelationStatistics Valid=292, Invalid=2570, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:04:13,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-05 07:04:13,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 413. [2021-06-05 07:04:13,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0194174757281553) internal successors, (832), 412 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:13,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 832 transitions. [2021-06-05 07:04:13,469 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 832 transitions. Word has length 30 [2021-06-05 07:04:13,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:13,469 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 832 transitions. [2021-06-05 07:04:13,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:13,469 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 832 transitions. [2021-06-05 07:04:13,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:13,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:13,470 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:13,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:13,670 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:13,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:13,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1044088099, now seen corresponding path program 186 times [2021-06-05 07:04:13,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:13,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894353978] [2021-06-05 07:04:13,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:13,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:13,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894353978] [2021-06-05 07:04:13,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894353978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:13,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407305517] [2021-06-05 07:04:13,894 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 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 [2021-06-05 07:04:13,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:04:13,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:13,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:13,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:14,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:04:14,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:14,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:14,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:14,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:04:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:14,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407305517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:14,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:14,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2021-06-05 07:04:14,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522100424] [2021-06-05 07:04:14,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:04:14,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:14,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:04:14,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:14,269 INFO L87 Difference]: Start difference. First operand 413 states and 832 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:15,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:15,552 INFO L93 Difference]: Finished difference Result 682 states and 1344 transitions. [2021-06-05 07:04:15,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:04:15,553 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:04:15,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:15,553 INFO L225 Difference]: With dead ends: 682 [2021-06-05 07:04:15,553 INFO L226 Difference]: Without dead ends: 665 [2021-06-05 07:04:15,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1066.2ms TimeCoverageRelationStatistics Valid=288, Invalid=2682, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:04:15,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-06-05 07:04:15,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 422. [2021-06-05 07:04:15,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.014251781472684) internal successors, (848), 421 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:15,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 848 transitions. [2021-06-05 07:04:15,558 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 848 transitions. Word has length 30 [2021-06-05 07:04:15,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:15,558 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 848 transitions. [2021-06-05 07:04:15,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:15,558 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 848 transitions. [2021-06-05 07:04:15,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:15,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:15,558 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:15,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-06-05 07:04:15,759 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:15,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:15,759 INFO L82 PathProgramCache]: Analyzing trace with hash 474950699, now seen corresponding path program 187 times [2021-06-05 07:04:15,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:15,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728239374] [2021-06-05 07:04:15,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:15,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:15,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728239374] [2021-06-05 07:04:15,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728239374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:15,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558176014] [2021-06-05 07:04:15,990 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 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 [2021-06-05 07:04:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:16,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:16,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:16,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:04:16,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:16,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:16,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:16,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:04:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:16,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558176014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:16,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:16,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:04:16,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930244262] [2021-06-05 07:04:16,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:04:16,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:16,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:04:16,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:16,349 INFO L87 Difference]: Start difference. First operand 422 states and 848 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:17,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:17,832 INFO L93 Difference]: Finished difference Result 718 states and 1404 transitions. [2021-06-05 07:04:17,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:04:17,832 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:04:17,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:17,833 INFO L225 Difference]: With dead ends: 718 [2021-06-05 07:04:17,833 INFO L226 Difference]: Without dead ends: 674 [2021-06-05 07:04:17,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1111.7ms TimeCoverageRelationStatistics Valid=287, Invalid=2793, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:04:17,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-06-05 07:04:17,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 412. [2021-06-05 07:04:17,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.004866180048662) internal successors, (824), 411 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:17,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 824 transitions. [2021-06-05 07:04:17,838 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 824 transitions. Word has length 30 [2021-06-05 07:04:17,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:17,838 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 824 transitions. [2021-06-05 07:04:17,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:17,838 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 824 transitions. [2021-06-05 07:04:17,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:17,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:17,838 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:18,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 07:04:18,053 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:18,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:18,053 INFO L82 PathProgramCache]: Analyzing trace with hash -155469709, now seen corresponding path program 188 times [2021-06-05 07:04:18,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:18,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787098251] [2021-06-05 07:04:18,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:18,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:18,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787098251] [2021-06-05 07:04:18,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787098251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:18,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187698232] [2021-06-05 07:04:18,306 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 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 [2021-06-05 07:04:18,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:18,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:18,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:18,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:18,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:04:18,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:18,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:18,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:18,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:04:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:18,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187698232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:18,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:18,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:04:18,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175316461] [2021-06-05 07:04:18,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:04:18,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:18,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:04:18,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:18,697 INFO L87 Difference]: Start difference. First operand 412 states and 824 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:19,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:19,625 INFO L93 Difference]: Finished difference Result 605 states and 1189 transitions. [2021-06-05 07:04:19,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:04:19,625 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:04:19,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:19,626 INFO L225 Difference]: With dead ends: 605 [2021-06-05 07:04:19,626 INFO L226 Difference]: Without dead ends: 596 [2021-06-05 07:04:19,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 971.9ms TimeCoverageRelationStatistics Valid=221, Invalid=2131, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:04:19,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-06-05 07:04:19,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 414. [2021-06-05 07:04:19,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.002421307506053) internal successors, (827), 413 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:19,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 827 transitions. [2021-06-05 07:04:19,634 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 827 transitions. Word has length 30 [2021-06-05 07:04:19,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:19,634 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 827 transitions. [2021-06-05 07:04:19,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:19,634 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 827 transitions. [2021-06-05 07:04:19,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:19,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:19,635 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:19,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:19,853 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:19,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:19,853 INFO L82 PathProgramCache]: Analyzing trace with hash 726596015, now seen corresponding path program 189 times [2021-06-05 07:04:19,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:19,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743685569] [2021-06-05 07:04:19,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:20,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:20,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743685569] [2021-06-05 07:04:20,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743685569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:20,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024473201] [2021-06-05 07:04:20,093 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 [2021-06-05 07:04:20,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:04:20,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:20,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:20,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:20,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:04:20,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:20,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:20,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:20,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:04:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:20,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024473201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:20,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:20,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:04:20,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623153629] [2021-06-05 07:04:20,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:04:20,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:20,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:04:20,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:20,483 INFO L87 Difference]: Start difference. First operand 414 states and 827 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:21,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:21,650 INFO L93 Difference]: Finished difference Result 500 states and 990 transitions. [2021-06-05 07:04:21,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:04:21,650 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:04:21,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:21,651 INFO L225 Difference]: With dead ends: 500 [2021-06-05 07:04:21,651 INFO L226 Difference]: Without dead ends: 477 [2021-06-05 07:04:21,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1106.1ms TimeCoverageRelationStatistics Valid=250, Invalid=2200, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:04:21,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-05 07:04:21,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 404. [2021-06-05 07:04:21,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0148883374689825) internal successors, (812), 403 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:21,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 812 transitions. [2021-06-05 07:04:21,654 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 812 transitions. Word has length 30 [2021-06-05 07:04:21,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:21,654 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 812 transitions. [2021-06-05 07:04:21,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:21,654 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 812 transitions. [2021-06-05 07:04:21,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:21,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:21,655 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:21,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 07:04:21,855 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:21,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:21,856 INFO L82 PathProgramCache]: Analyzing trace with hash -151411635, now seen corresponding path program 190 times [2021-06-05 07:04:21,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:21,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493550199] [2021-06-05 07:04:21,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:21,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:22,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:22,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493550199] [2021-06-05 07:04:22,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493550199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:22,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291950254] [2021-06-05 07:04:22,079 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 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 [2021-06-05 07:04:22,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:22,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:22,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:22,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:22,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:04:22,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:22,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:22,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:22,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:04:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:22,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291950254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:22,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:22,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:04:22,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835719100] [2021-06-05 07:04:22,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:04:22,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:22,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:04:22,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:22,466 INFO L87 Difference]: Start difference. First operand 404 states and 812 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:23,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:23,432 INFO L93 Difference]: Finished difference Result 602 states and 1190 transitions. [2021-06-05 07:04:23,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:04:23,432 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:04:23,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:23,433 INFO L225 Difference]: With dead ends: 602 [2021-06-05 07:04:23,433 INFO L226 Difference]: Without dead ends: 569 [2021-06-05 07:04:23,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 982.1ms TimeCoverageRelationStatistics Valid=224, Invalid=2128, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:04:23,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-06-05 07:04:23,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 401. [2021-06-05 07:04:23,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0175) internal successors, (807), 400 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:23,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 807 transitions. [2021-06-05 07:04:23,437 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 807 transitions. Word has length 30 [2021-06-05 07:04:23,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:23,437 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 807 transitions. [2021-06-05 07:04:23,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:23,437 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 807 transitions. [2021-06-05 07:04:23,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:23,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:23,437 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:23,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 07:04:23,638 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:23,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:23,638 INFO L82 PathProgramCache]: Analyzing trace with hash 334725869, now seen corresponding path program 191 times [2021-06-05 07:04:23,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:23,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517601853] [2021-06-05 07:04:23,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:23,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:23,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517601853] [2021-06-05 07:04:23,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517601853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:23,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593730182] [2021-06-05 07:04:23,872 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 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 [2021-06-05 07:04:23,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:23,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:23,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:23,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:24,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:04:24,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:24,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:24,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:24,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:04:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:24,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593730182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:24,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:24,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:04:24,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224950385] [2021-06-05 07:04:24,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:04:24,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:24,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:04:24,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:24,258 INFO L87 Difference]: Start difference. First operand 401 states and 807 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:25,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:25,242 INFO L93 Difference]: Finished difference Result 593 states and 1164 transitions. [2021-06-05 07:04:25,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:04:25,242 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:04:25,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:25,243 INFO L225 Difference]: With dead ends: 593 [2021-06-05 07:04:25,243 INFO L226 Difference]: Without dead ends: 584 [2021-06-05 07:04:25,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 924.9ms TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:04:25,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-05 07:04:25,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 415. [2021-06-05 07:04:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.0120772946859904) internal successors, (833), 414 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:25,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 833 transitions. [2021-06-05 07:04:25,247 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 833 transitions. Word has length 30 [2021-06-05 07:04:25,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:25,247 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 833 transitions. [2021-06-05 07:04:25,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:25,247 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 833 transitions. [2021-06-05 07:04:25,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:25,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:25,248 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:25,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 07:04:25,448 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:25,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:25,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1216791593, now seen corresponding path program 192 times [2021-06-05 07:04:25,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:25,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932759719] [2021-06-05 07:04:25,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:25,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:25,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932759719] [2021-06-05 07:04:25,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932759719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:25,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722043032] [2021-06-05 07:04:25,687 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 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 [2021-06-05 07:04:25,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:04:25,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:25,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:25,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:25,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:04:25,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:25,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:25,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:25,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:04:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:26,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722043032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:26,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:26,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:04:26,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668336183] [2021-06-05 07:04:26,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:04:26,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:26,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:04:26,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:26,074 INFO L87 Difference]: Start difference. First operand 415 states and 833 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:27,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:27,059 INFO L93 Difference]: Finished difference Result 507 states and 1004 transitions. [2021-06-05 07:04:27,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:04:27,060 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:04:27,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:27,060 INFO L225 Difference]: With dead ends: 507 [2021-06-05 07:04:27,060 INFO L226 Difference]: Without dead ends: 492 [2021-06-05 07:04:27,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1075.6ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:04:27,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-05 07:04:27,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 413. [2021-06-05 07:04:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.012135922330097) internal successors, (829), 412 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:27,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 829 transitions. [2021-06-05 07:04:27,064 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 829 transitions. Word has length 30 [2021-06-05 07:04:27,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:27,064 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 829 transitions. [2021-06-05 07:04:27,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:27,064 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 829 transitions. [2021-06-05 07:04:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:27,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:27,064 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:27,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:27,265 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:27,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:27,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1609508985, now seen corresponding path program 193 times [2021-06-05 07:04:27,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:27,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573499790] [2021-06-05 07:04:27,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:27,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:27,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573499790] [2021-06-05 07:04:27,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573499790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:27,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918146779] [2021-06-05 07:04:27,494 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 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 [2021-06-05 07:04:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:27,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:27,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:27,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:04:27,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:27,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:27,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:27,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:04:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:27,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918146779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:27,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:27,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:04:27,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587990961] [2021-06-05 07:04:27,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:04:27,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:27,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:04:27,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:04:27,826 INFO L87 Difference]: Start difference. First operand 413 states and 829 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:28,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:28,721 INFO L93 Difference]: Finished difference Result 592 states and 1166 transitions. [2021-06-05 07:04:28,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:04:28,722 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:04:28,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:28,722 INFO L225 Difference]: With dead ends: 592 [2021-06-05 07:04:28,722 INFO L226 Difference]: Without dead ends: 547 [2021-06-05 07:04:28,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 851.7ms TimeCoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:04:28,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-05 07:04:28,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 405. [2021-06-05 07:04:28,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.012376237623762) internal successors, (813), 404 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:28,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 813 transitions. [2021-06-05 07:04:28,726 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 813 transitions. Word has length 30 [2021-06-05 07:04:28,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:28,726 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 813 transitions. [2021-06-05 07:04:28,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:28,726 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 813 transitions. [2021-06-05 07:04:28,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:28,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:28,727 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:28,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 07:04:28,927 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:28,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:28,928 INFO L82 PathProgramCache]: Analyzing trace with hash 338783943, now seen corresponding path program 194 times [2021-06-05 07:04:28,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:28,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392600662] [2021-06-05 07:04:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:29,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:29,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392600662] [2021-06-05 07:04:29,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392600662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:29,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374179425] [2021-06-05 07:04:29,148 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 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 [2021-06-05 07:04:29,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:29,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:29,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:29,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:29,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:04:29,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:29,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:29,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:29,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:04:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:29,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374179425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:29,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:29,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:04:29,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413737025] [2021-06-05 07:04:29,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:04:29,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:29,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:04:29,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:29,530 INFO L87 Difference]: Start difference. First operand 405 states and 813 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:30,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:30,393 INFO L93 Difference]: Finished difference Result 575 states and 1135 transitions. [2021-06-05 07:04:30,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:04:30,393 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:04:30,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:30,393 INFO L225 Difference]: With dead ends: 575 [2021-06-05 07:04:30,393 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 07:04:30,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 892.0ms TimeCoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:04:30,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 07:04:30,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 403. [2021-06-05 07:04:30,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.012437810945274) internal successors, (809), 402 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 809 transitions. [2021-06-05 07:04:30,397 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 809 transitions. Word has length 30 [2021-06-05 07:04:30,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:30,397 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 809 transitions. [2021-06-05 07:04:30,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:30,397 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 809 transitions. [2021-06-05 07:04:30,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:30,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:30,398 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:30,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:30,598 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:30,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:30,599 INFO L82 PathProgramCache]: Analyzing trace with hash -2000724797, now seen corresponding path program 195 times [2021-06-05 07:04:30,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:30,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515830629] [2021-06-05 07:04:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:30,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:30,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515830629] [2021-06-05 07:04:30,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515830629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:30,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438124181] [2021-06-05 07:04:30,840 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 [2021-06-05 07:04:30,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:04:30,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:30,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:30,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:31,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:04:31,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:31,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:31,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:31,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:04:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:31,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438124181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:31,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:31,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 07:04:31,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480685132] [2021-06-05 07:04:31,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:04:31,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:31,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:04:31,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:04:31,267 INFO L87 Difference]: Start difference. First operand 403 states and 809 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:32,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:32,174 INFO L93 Difference]: Finished difference Result 576 states and 1136 transitions. [2021-06-05 07:04:32,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:04:32,174 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:04:32,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:32,175 INFO L225 Difference]: With dead ends: 576 [2021-06-05 07:04:32,175 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 07:04:32,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 980.6ms TimeCoverageRelationStatistics Valid=219, Invalid=2231, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:04:32,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 07:04:32,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 400. [2021-06-05 07:04:32,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0150375939849625) internal successors, (804), 399 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 804 transitions. [2021-06-05 07:04:32,179 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 804 transitions. Word has length 30 [2021-06-05 07:04:32,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:32,179 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 804 transitions. [2021-06-05 07:04:32,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:32,179 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 804 transitions. [2021-06-05 07:04:32,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:32,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:32,179 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:32,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:32,380 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:32,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:32,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1343879433, now seen corresponding path program 196 times [2021-06-05 07:04:32,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:32,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617976808] [2021-06-05 07:04:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:32,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:32,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617976808] [2021-06-05 07:04:32,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617976808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:32,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356498394] [2021-06-05 07:04:32,613 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 [2021-06-05 07:04:32,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:32,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:32,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:32,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:32,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:04:32,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:32,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:32,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:32,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:04:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:32,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356498394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:32,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:32,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:04:32,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706818878] [2021-06-05 07:04:32,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:04:32,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:32,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:04:32,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:32,995 INFO L87 Difference]: Start difference. First operand 400 states and 804 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:33,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:33,964 INFO L93 Difference]: Finished difference Result 611 states and 1193 transitions. [2021-06-05 07:04:33,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:04:33,965 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:04:33,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:33,965 INFO L225 Difference]: With dead ends: 611 [2021-06-05 07:04:33,965 INFO L226 Difference]: Without dead ends: 602 [2021-06-05 07:04:33,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 965.1ms TimeCoverageRelationStatistics Valid=232, Invalid=2318, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:04:33,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-05 07:04:33,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 429. [2021-06-05 07:04:33,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.0093457943925235) internal successors, (860), 428 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:33,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 860 transitions. [2021-06-05 07:04:33,970 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 860 transitions. Word has length 30 [2021-06-05 07:04:33,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:33,970 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 860 transitions. [2021-06-05 07:04:33,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:33,970 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 860 transitions. [2021-06-05 07:04:33,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:33,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:33,970 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:34,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-06-05 07:04:34,171 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:34,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:34,171 INFO L82 PathProgramCache]: Analyzing trace with hash -461813709, now seen corresponding path program 197 times [2021-06-05 07:04:34,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:34,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630786008] [2021-06-05 07:04:34,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:34,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:34,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630786008] [2021-06-05 07:04:34,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630786008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:34,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638946052] [2021-06-05 07:04:34,414 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 [2021-06-05 07:04:34,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:34,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:34,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:04:34,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:34,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:04:34,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:34,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:34,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:34,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:04:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:34,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638946052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:34,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:34,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:04:34,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837189361] [2021-06-05 07:04:34,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:04:34,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:34,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:04:34,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:34,801 INFO L87 Difference]: Start difference. First operand 429 states and 860 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:36,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:36,157 INFO L93 Difference]: Finished difference Result 502 states and 984 transitions. [2021-06-05 07:04:36,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:04:36,158 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:04:36,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:36,158 INFO L225 Difference]: With dead ends: 502 [2021-06-05 07:04:36,158 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 07:04:36,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1256.0ms TimeCoverageRelationStatistics Valid=288, Invalid=2682, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:04:36,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 07:04:36,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 425. [2021-06-05 07:04:36,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.009433962264151) internal successors, (852), 424 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:36,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 852 transitions. [2021-06-05 07:04:36,162 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 852 transitions. Word has length 30 [2021-06-05 07:04:36,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:36,162 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 852 transitions. [2021-06-05 07:04:36,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:36,162 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 852 transitions. [2021-06-05 07:04:36,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:36,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:36,163 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:36,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:36,363 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:36,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:36,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1006853009, now seen corresponding path program 198 times [2021-06-05 07:04:36,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:36,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297609598] [2021-06-05 07:04:36,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:36,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:36,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297609598] [2021-06-05 07:04:36,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297609598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:36,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309720183] [2021-06-05 07:04:36,598 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 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 [2021-06-05 07:04:36,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:04:36,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:36,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:36,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:36,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:04:36,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:36,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:36,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:36,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:04:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:36,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309720183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:36,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:36,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:04:36,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157839590] [2021-06-05 07:04:36,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:04:36,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:36,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:04:36,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:04:36,937 INFO L87 Difference]: Start difference. First operand 425 states and 852 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:37,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:37,887 INFO L93 Difference]: Finished difference Result 618 states and 1206 transitions. [2021-06-05 07:04:37,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:04:37,888 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:04:37,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:37,888 INFO L225 Difference]: With dead ends: 618 [2021-06-05 07:04:37,888 INFO L226 Difference]: Without dead ends: 573 [2021-06-05 07:04:37,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 873.3ms TimeCoverageRelationStatistics Valid=218, Invalid=1944, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:04:37,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-05 07:04:37,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 412. [2021-06-05 07:04:37,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.0097323600973236) internal successors, (826), 411 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:37,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 826 transitions. [2021-06-05 07:04:37,892 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 826 transitions. Word has length 30 [2021-06-05 07:04:37,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:37,892 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 826 transitions. [2021-06-05 07:04:37,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:37,892 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 826 transitions. [2021-06-05 07:04:37,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:37,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:37,892 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:38,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 07:04:38,093 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:38,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:38,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1339821359, now seen corresponding path program 199 times [2021-06-05 07:04:38,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:38,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000695920] [2021-06-05 07:04:38,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:38,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:38,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000695920] [2021-06-05 07:04:38,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000695920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:38,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4634751] [2021-06-05 07:04:38,316 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 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 [2021-06-05 07:04:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:38,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:38,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:38,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:04:38,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:38,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:38,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:38,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:04:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:38,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4634751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:38,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:38,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:04:38,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777060686] [2021-06-05 07:04:38,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:04:38,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:38,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:04:38,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:38,695 INFO L87 Difference]: Start difference. First operand 412 states and 826 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:39,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:39,659 INFO L93 Difference]: Finished difference Result 619 states and 1205 transitions. [2021-06-05 07:04:39,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:04:39,660 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:04:39,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:39,660 INFO L225 Difference]: With dead ends: 619 [2021-06-05 07:04:39,660 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 07:04:39,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 901.2ms TimeCoverageRelationStatistics Valid=216, Invalid=2040, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:04:39,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 07:04:39,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 409. [2021-06-05 07:04:39,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0098039215686274) internal successors, (820), 408 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 820 transitions. [2021-06-05 07:04:39,664 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 820 transitions. Word has length 30 [2021-06-05 07:04:39,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:39,664 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 820 transitions. [2021-06-05 07:04:39,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:39,664 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 820 transitions. [2021-06-05 07:04:39,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:39,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:39,665 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:39,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 07:04:39,865 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:39,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:39,866 INFO L82 PathProgramCache]: Analyzing trace with hash 615637197, now seen corresponding path program 200 times [2021-06-05 07:04:39,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:39,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333760701] [2021-06-05 07:04:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:40,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:40,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333760701] [2021-06-05 07:04:40,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333760701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:40,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387309762] [2021-06-05 07:04:40,109 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 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 [2021-06-05 07:04:40,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:40,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:40,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:40,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:40,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:04:40,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:40,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:40,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:40,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:04:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:40,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387309762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:40,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:40,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 36 [2021-06-05 07:04:40,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377419159] [2021-06-05 07:04:40,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:04:40,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:40,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:04:40,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:04:40,595 INFO L87 Difference]: Start difference. First operand 409 states and 820 transitions. Second operand has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:41,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:41,514 INFO L93 Difference]: Finished difference Result 638 states and 1236 transitions. [2021-06-05 07:04:41,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:04:41,514 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 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 30 [2021-06-05 07:04:41,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:41,515 INFO L225 Difference]: With dead ends: 638 [2021-06-05 07:04:41,515 INFO L226 Difference]: Without dead ends: 602 [2021-06-05 07:04:41,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1087.1ms TimeCoverageRelationStatistics Valid=255, Invalid=2715, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:04:41,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-05 07:04:41,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 406. [2021-06-05 07:04:41,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:41,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 815 transitions. [2021-06-05 07:04:41,519 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 815 transitions. Word has length 30 [2021-06-05 07:04:41,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:41,519 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 815 transitions. [2021-06-05 07:04:41,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:41,519 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 815 transitions. [2021-06-05 07:04:41,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:41,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:41,520 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:41,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:41,720 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:41,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:41,721 INFO L82 PathProgramCache]: Analyzing trace with hash 132233937, now seen corresponding path program 201 times [2021-06-05 07:04:41,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:41,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721670335] [2021-06-05 07:04:41,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:41,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:41,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721670335] [2021-06-05 07:04:41,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721670335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:41,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513225119] [2021-06-05 07:04:41,988 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 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 [2021-06-05 07:04:42,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:04:42,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:42,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:04:42,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:42,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:04:42,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:42,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:42,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:42,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2021-06-05 07:04:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:42,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513225119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:42,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:42,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 07:04:42,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033446527] [2021-06-05 07:04:42,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 07:04:42,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:42,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 07:04:42,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:04:42,452 INFO L87 Difference]: Start difference. First operand 406 states and 815 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:43,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:43,563 INFO L93 Difference]: Finished difference Result 568 states and 1118 transitions. [2021-06-05 07:04:43,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:04:43,563 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 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 30 [2021-06-05 07:04:43,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:43,563 INFO L225 Difference]: With dead ends: 568 [2021-06-05 07:04:43,563 INFO L226 Difference]: Without dead ends: 561 [2021-06-05 07:04:43,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1199.9ms TimeCoverageRelationStatistics Valid=259, Invalid=2821, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:04:43,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-05 07:04:43,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 391. [2021-06-05 07:04:43,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0076923076923077) internal successors, (783), 390 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 783 transitions. [2021-06-05 07:04:43,567 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 783 transitions. Word has length 30 [2021-06-05 07:04:43,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:43,567 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 783 transitions. [2021-06-05 07:04:43,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:43,568 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 783 transitions. [2021-06-05 07:04:43,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:43,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:43,568 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:43,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 07:04:43,768 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:43,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:43,769 INFO L82 PathProgramCache]: Analyzing trace with hash -880617735, now seen corresponding path program 202 times [2021-06-05 07:04:43,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:43,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063596280] [2021-06-05 07:04:43,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:43,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:43,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063596280] [2021-06-05 07:04:43,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063596280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:43,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953356562] [2021-06-05 07:04:43,982 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 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 [2021-06-05 07:04:44,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:44,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:44,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:44,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:44,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:04:44,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:44,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:44,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:44,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:04:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:44,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953356562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:44,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:44,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-06-05 07:04:44,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252708291] [2021-06-05 07:04:44,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:04:44,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:44,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:04:44,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:04:44,216 INFO L87 Difference]: Start difference. First operand 391 states and 783 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:44,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:44,970 INFO L93 Difference]: Finished difference Result 586 states and 1147 transitions. [2021-06-05 07:04:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:04:44,970 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 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 30 [2021-06-05 07:04:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:44,971 INFO L225 Difference]: With dead ends: 586 [2021-06-05 07:04:44,971 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 07:04:44,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 677.5ms TimeCoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:04:44,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 07:04:44,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 421. [2021-06-05 07:04:44,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.9976190476190476) internal successors, (839), 420 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:44,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 839 transitions. [2021-06-05 07:04:44,975 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 839 transitions. Word has length 30 [2021-06-05 07:04:44,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:44,975 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 839 transitions. [2021-06-05 07:04:44,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:44,975 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 839 transitions. [2021-06-05 07:04:44,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:44,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:44,975 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:45,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:45,176 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:45,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:45,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1447989, now seen corresponding path program 203 times [2021-06-05 07:04:45,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:45,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219529611] [2021-06-05 07:04:45,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:45,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:45,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219529611] [2021-06-05 07:04:45,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219529611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:45,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13575702] [2021-06-05 07:04:45,390 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 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 [2021-06-05 07:04:45,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:04:45,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:45,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:04:45,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:45,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:04:45,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:45,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:45,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:45,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:04:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:45,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13575702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:45,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:45,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-06-05 07:04:45,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176633018] [2021-06-05 07:04:45,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:04:45,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:45,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:04:45,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:04:45,627 INFO L87 Difference]: Start difference. First operand 421 states and 839 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:46,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:46,493 INFO L93 Difference]: Finished difference Result 510 states and 1010 transitions. [2021-06-05 07:04:46,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:04:46,493 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 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 30 [2021-06-05 07:04:46,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:46,494 INFO L225 Difference]: With dead ends: 510 [2021-06-05 07:04:46,494 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 07:04:46,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 788.6ms TimeCoverageRelationStatistics Valid=198, Invalid=1442, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:04:46,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 07:04:46,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 419. [2021-06-05 07:04:46,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.9976076555023923) internal successors, (835), 418 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:46,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 835 transitions. [2021-06-05 07:04:46,497 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 835 transitions. Word has length 30 [2021-06-05 07:04:46,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:46,498 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 835 transitions. [2021-06-05 07:04:46,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:46,498 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 835 transitions. [2021-06-05 07:04:46,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:46,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:46,498 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:46,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-05 07:04:46,699 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:46,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:46,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1470114707, now seen corresponding path program 204 times [2021-06-05 07:04:46,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:46,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581036645] [2021-06-05 07:04:46,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:46,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:46,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581036645] [2021-06-05 07:04:46,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581036645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:46,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064984183] [2021-06-05 07:04:46,909 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 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 [2021-06-05 07:04:46,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:04:46,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:46,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:04:46,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:46,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:04:46,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:46,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:46,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:46,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:04:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:47,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064984183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:47,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:47,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-05 07:04:47,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231655038] [2021-06-05 07:04:47,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:04:47,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:47,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:04:47,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:04:47,114 INFO L87 Difference]: Start difference. First operand 419 states and 835 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:47,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:47,831 INFO L93 Difference]: Finished difference Result 565 states and 1109 transitions. [2021-06-05 07:04:47,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:04:47,832 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 30 [2021-06-05 07:04:47,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:47,832 INFO L225 Difference]: With dead ends: 565 [2021-06-05 07:04:47,832 INFO L226 Difference]: Without dead ends: 548 [2021-06-05 07:04:47,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 661.2ms TimeCoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:04:47,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-06-05 07:04:47,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 418. [2021-06-05 07:04:47,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.9976019184652278) internal successors, (833), 417 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 833 transitions. [2021-06-05 07:04:47,836 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 833 transitions. Word has length 30 [2021-06-05 07:04:47,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:47,836 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 833 transitions. [2021-06-05 07:04:47,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:47,837 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 833 transitions. [2021-06-05 07:04:47,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:47,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:47,837 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:48,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:48,037 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:48,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:48,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1305813791, now seen corresponding path program 205 times [2021-06-05 07:04:48,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:48,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188870668] [2021-06-05 07:04:48,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:48,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:48,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188870668] [2021-06-05 07:04:48,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188870668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:48,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642724844] [2021-06-05 07:04:48,253 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 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 [2021-06-05 07:04:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:48,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:48,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:48,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:04:48,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:48,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:48,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:48,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:04:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:48,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642724844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:48,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:48,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-06-05 07:04:48,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814081701] [2021-06-05 07:04:48,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:04:48,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:48,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:04:48,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:04:48,479 INFO L87 Difference]: Start difference. First operand 418 states and 833 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:49,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:49,166 INFO L93 Difference]: Finished difference Result 567 states and 1112 transitions. [2021-06-05 07:04:49,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:04:49,166 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 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 30 [2021-06-05 07:04:49,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:49,167 INFO L225 Difference]: With dead ends: 567 [2021-06-05 07:04:49,167 INFO L226 Difference]: Without dead ends: 526 [2021-06-05 07:04:49,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 697.7ms TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:04:49,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-05 07:04:49,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 402. [2021-06-05 07:04:49,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.002493765586035) internal successors, (803), 401 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 803 transitions. [2021-06-05 07:04:49,170 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 803 transitions. Word has length 30 [2021-06-05 07:04:49,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:49,171 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 803 transitions. [2021-06-05 07:04:49,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:49,171 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 803 transitions. [2021-06-05 07:04:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:49,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:49,171 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:49,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 07:04:49,372 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:49,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:49,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1577396431, now seen corresponding path program 206 times [2021-06-05 07:04:49,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:49,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788605998] [2021-06-05 07:04:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:49,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:49,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788605998] [2021-06-05 07:04:49,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788605998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:49,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225064752] [2021-06-05 07:04:49,594 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 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 [2021-06-05 07:04:49,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:49,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:49,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:49,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:49,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:04:49,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:49,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:49,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:49,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:04:49,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:49,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225064752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:49,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:49,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 07:04:49,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942124850] [2021-06-05 07:04:49,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:04:49,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:49,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:04:49,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:04:49,828 INFO L87 Difference]: Start difference. First operand 402 states and 803 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:50,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:50,587 INFO L93 Difference]: Finished difference Result 584 states and 1147 transitions. [2021-06-05 07:04:50,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:04:50,587 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 30 [2021-06-05 07:04:50,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:50,587 INFO L225 Difference]: With dead ends: 584 [2021-06-05 07:04:50,588 INFO L226 Difference]: Without dead ends: 575 [2021-06-05 07:04:50,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 674.3ms TimeCoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:04:50,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-06-05 07:04:50,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 419. [2021-06-05 07:04:50,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.0) internal successors, (836), 418 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:50,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 836 transitions. [2021-06-05 07:04:50,592 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 836 transitions. Word has length 30 [2021-06-05 07:04:50,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:50,592 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 836 transitions. [2021-06-05 07:04:50,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:50,592 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 836 transitions. [2021-06-05 07:04:50,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:50,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:50,592 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:50,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-06-05 07:04:50,793 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:50,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:50,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1835505141, now seen corresponding path program 207 times [2021-06-05 07:04:50,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:50,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152168365] [2021-06-05 07:04:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:50,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:50,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:50,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152168365] [2021-06-05 07:04:50,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152168365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:50,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146566989] [2021-06-05 07:04:50,998 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 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 [2021-06-05 07:04:51,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:04:51,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:51,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:04:51,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:51,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:04:51,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:51,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:51,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:51,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 07:04:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:51,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146566989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:51,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:51,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-06-05 07:04:51,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745833487] [2021-06-05 07:04:51,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:04:51,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:51,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:04:51,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:04:51,267 INFO L87 Difference]: Start difference. First operand 419 states and 836 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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) [2021-06-05 07:04:52,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:52,092 INFO L93 Difference]: Finished difference Result 509 states and 1009 transitions. [2021-06-05 07:04:52,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:04:52,092 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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 30 [2021-06-05 07:04:52,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:52,093 INFO L225 Difference]: With dead ends: 509 [2021-06-05 07:04:52,093 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 07:04:52,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 858.5ms TimeCoverageRelationStatistics Valid=222, Invalid=1500, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:04:52,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 07:04:52,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 417. [2021-06-05 07:04:52,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0) internal successors, (832), 416 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:52,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 832 transitions. [2021-06-05 07:04:52,096 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 832 transitions. Word has length 30 [2021-06-05 07:04:52,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:52,096 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 832 transitions. [2021-06-05 07:04:52,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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) [2021-06-05 07:04:52,097 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 832 transitions. [2021-06-05 07:04:52,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:52,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:52,097 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:52,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:52,319 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:52,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:52,320 INFO L82 PathProgramCache]: Analyzing trace with hash -366838423, now seen corresponding path program 208 times [2021-06-05 07:04:52,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:52,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774283605] [2021-06-05 07:04:52,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:52,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:52,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774283605] [2021-06-05 07:04:52,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774283605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:52,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481633808] [2021-06-05 07:04:52,527 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 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 [2021-06-05 07:04:52,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:52,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:52,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:52,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:52,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:04:52,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:52,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:52,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:52,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:04:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:52,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481633808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:52,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:52,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2021-06-05 07:04:52,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725215665] [2021-06-05 07:04:52,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:04:52,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:52,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:04:52,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:04:52,733 INFO L87 Difference]: Start difference. First operand 417 states and 832 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:53,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:53,320 INFO L93 Difference]: Finished difference Result 563 states and 1106 transitions. [2021-06-05 07:04:53,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:04:53,320 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 30 [2021-06-05 07:04:53,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:53,320 INFO L225 Difference]: With dead ends: 563 [2021-06-05 07:04:53,320 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 07:04:53,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 626.3ms TimeCoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:04:53,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 07:04:53,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 416. [2021-06-05 07:04:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.0) internal successors, (830), 415 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:53,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 830 transitions. [2021-06-05 07:04:53,325 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 830 transitions. Word has length 30 [2021-06-05 07:04:53,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:53,325 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 830 transitions. [2021-06-05 07:04:53,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:53,326 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 830 transitions. [2021-06-05 07:04:53,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:53,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:53,326 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:53,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-06-05 07:04:53,550 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:53,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:53,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1152200375, now seen corresponding path program 209 times [2021-06-05 07:04:53,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:53,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140708416] [2021-06-05 07:04:53,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:53,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:53,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140708416] [2021-06-05 07:04:53,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140708416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:53,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520076676] [2021-06-05 07:04:53,752 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 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 [2021-06-05 07:04:53,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:04:53,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:53,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:04:53,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:53,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:04:53,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:53,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:53,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:53,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:04:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:53,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520076676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:53,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:53,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 07:04:53,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111693327] [2021-06-05 07:04:53,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:04:53,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:53,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:04:53,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:04:53,980 INFO L87 Difference]: Start difference. First operand 416 states and 830 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:54,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:54,539 INFO L93 Difference]: Finished difference Result 565 states and 1109 transitions. [2021-06-05 07:04:54,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:04:54,539 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 30 [2021-06-05 07:04:54,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:54,540 INFO L225 Difference]: With dead ends: 565 [2021-06-05 07:04:54,540 INFO L226 Difference]: Without dead ends: 524 [2021-06-05 07:04:54,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 647.9ms TimeCoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:04:54,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-05 07:04:54,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 403. [2021-06-05 07:04:54,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0024875621890548) internal successors, (805), 402 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:54,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 805 transitions. [2021-06-05 07:04:54,544 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 805 transitions. Word has length 30 [2021-06-05 07:04:54,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:54,544 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 805 transitions. [2021-06-05 07:04:54,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:54,544 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 805 transitions. [2021-06-05 07:04:54,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:54,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:54,544 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:54,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 07:04:54,745 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:54,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:54,745 INFO L82 PathProgramCache]: Analyzing trace with hash -720161803, now seen corresponding path program 210 times [2021-06-05 07:04:54,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:54,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575509133] [2021-06-05 07:04:54,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:54,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:54,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575509133] [2021-06-05 07:04:54,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575509133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:54,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369875887] [2021-06-05 07:04:54,964 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 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 [2021-06-05 07:04:54,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:04:54,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:54,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:04:54,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:55,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:04:55,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:55,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:55,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:55,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:04:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:55,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369875887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:55,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:55,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:04:55,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781730809] [2021-06-05 07:04:55,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:04:55,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:55,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:04:55,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:04:55,222 INFO L87 Difference]: Start difference. First operand 403 states and 805 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:56,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:56,217 INFO L93 Difference]: Finished difference Result 607 states and 1188 transitions. [2021-06-05 07:04:56,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:04:56,217 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:04:56,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:56,218 INFO L225 Difference]: With dead ends: 607 [2021-06-05 07:04:56,218 INFO L226 Difference]: Without dead ends: 598 [2021-06-05 07:04:56,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 877.8ms TimeCoverageRelationStatistics Valid=209, Invalid=1771, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:04:56,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-06-05 07:04:56,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 417. [2021-06-05 07:04:56,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0048076923076925) internal successors, (834), 416 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:56,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 834 transitions. [2021-06-05 07:04:56,222 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 834 transitions. Word has length 30 [2021-06-05 07:04:56,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:56,222 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 834 transitions. [2021-06-05 07:04:56,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:56,222 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 834 transitions. [2021-06-05 07:04:56,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:56,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:56,223 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:56,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:56,423 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:56,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:56,424 INFO L82 PathProgramCache]: Analyzing trace with hash 161903921, now seen corresponding path program 211 times [2021-06-05 07:04:56,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:56,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28013378] [2021-06-05 07:04:56,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:56,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:56,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28013378] [2021-06-05 07:04:56,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28013378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:56,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432441673] [2021-06-05 07:04:56,643 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 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 [2021-06-05 07:04:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:56,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:56,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:56,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:04:56,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:56,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:56,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:56,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:04:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:56,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432441673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:56,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:56,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:04:56,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117457474] [2021-06-05 07:04:56,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:04:56,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:56,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:04:56,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:04:56,909 INFO L87 Difference]: Start difference. First operand 417 states and 834 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:58,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:58,028 INFO L93 Difference]: Finished difference Result 524 states and 1032 transitions. [2021-06-05 07:04:58,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:04:58,029 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:04:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:58,029 INFO L225 Difference]: With dead ends: 524 [2021-06-05 07:04:58,029 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 07:04:58,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1027.5ms TimeCoverageRelationStatistics Valid=241, Invalid=1829, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:04:58,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 07:04:58,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 415. [2021-06-05 07:04:58,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.004830917874396) internal successors, (830), 414 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 830 transitions. [2021-06-05 07:04:58,033 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 830 transitions. Word has length 30 [2021-06-05 07:04:58,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:58,033 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 830 transitions. [2021-06-05 07:04:58,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:58,033 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 830 transitions. [2021-06-05 07:04:58,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:58,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:58,034 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:58,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 07:04:58,234 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:58,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:58,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1630570639, now seen corresponding path program 212 times [2021-06-05 07:04:58,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:58,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235846763] [2021-06-05 07:04:58,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:58,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:58,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235846763] [2021-06-05 07:04:58,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235846763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:58,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048006645] [2021-06-05 07:04:58,494 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 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 [2021-06-05 07:04:58,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:58,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:58,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:04:58,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:58,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:04:58,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:58,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:58,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:58,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:04:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:58,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048006645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:58,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:58,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 07:04:58,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659194955] [2021-06-05 07:04:58,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:04:58,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:58,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:04:58,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:04:58,721 INFO L87 Difference]: Start difference. First operand 415 states and 830 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:59,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:59,742 INFO L93 Difference]: Finished difference Result 595 states and 1167 transitions. [2021-06-05 07:04:59,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:04:59,743 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 30 [2021-06-05 07:04:59,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:59,743 INFO L225 Difference]: With dead ends: 595 [2021-06-05 07:04:59,743 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 07:04:59,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1030.5ms TimeCoverageRelationStatistics Valid=246, Invalid=2106, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:04:59,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 07:04:59,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 424. [2021-06-05 07:04:59,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.0) internal successors, (846), 423 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:59,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 846 transitions. [2021-06-05 07:04:59,747 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 846 transitions. Word has length 30 [2021-06-05 07:04:59,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:59,748 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 846 transitions. [2021-06-05 07:04:59,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:59,748 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 846 transitions. [2021-06-05 07:04:59,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:04:59,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:59,748 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:59,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 07:04:59,965 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:59,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:59,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1145357859, now seen corresponding path program 213 times [2021-06-05 07:04:59,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:59,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166108477] [2021-06-05 07:04:59,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:00,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:00,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166108477] [2021-06-05 07:05:00,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166108477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:00,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707205995] [2021-06-05 07:05:00,190 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 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 [2021-06-05 07:05:00,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:05:00,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:00,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:05:00,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:00,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:00,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:00,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:00,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:00,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 07:05:00,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:00,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707205995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:00,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:00,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 27 [2021-06-05 07:05:00,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432242624] [2021-06-05 07:05:00,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 07:05:00,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:00,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 07:05:00,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:05:00,465 INFO L87 Difference]: Start difference. First operand 424 states and 846 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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) [2021-06-05 07:05:01,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:01,542 INFO L93 Difference]: Finished difference Result 594 states and 1164 transitions. [2021-06-05 07:05:01,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:05:01,543 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 30 [2021-06-05 07:05:01,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:01,543 INFO L225 Difference]: With dead ends: 594 [2021-06-05 07:05:01,543 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 07:05:01,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1067.8ms TimeCoverageRelationStatistics Valid=291, Invalid=2465, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:05:01,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 07:05:01,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 414. [2021-06-05 07:05:01,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.9903147699757868) internal successors, (822), 413 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 822 transitions. [2021-06-05 07:05:01,547 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 822 transitions. Word has length 30 [2021-06-05 07:05:01,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:01,547 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 822 transitions. [2021-06-05 07:05:01,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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) [2021-06-05 07:05:01,548 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 822 transitions. [2021-06-05 07:05:01,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:01,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:01,548 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:01,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 07:05:01,749 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:01,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:01,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1775778267, now seen corresponding path program 214 times [2021-06-05 07:05:01,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:01,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210646281] [2021-06-05 07:05:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:01,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:01,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210646281] [2021-06-05 07:05:01,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210646281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:01,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820667426] [2021-06-05 07:05:01,977 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 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 [2021-06-05 07:05:01,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:05:02,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:02,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:05:02,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:02,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:02,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:02,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:02,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:02,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:05:02,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:02,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820667426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:02,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:02,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:05:02,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500666951] [2021-06-05 07:05:02,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:05:02,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:02,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:05:02,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:05:02,252 INFO L87 Difference]: Start difference. First operand 414 states and 822 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:03,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:03,251 INFO L93 Difference]: Finished difference Result 567 states and 1106 transitions. [2021-06-05 07:05:03,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:05:03,251 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:05:03,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:03,252 INFO L225 Difference]: With dead ends: 567 [2021-06-05 07:05:03,252 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 07:05:03,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 879.8ms TimeCoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:05:03,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 07:05:03,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 416. [2021-06-05 07:05:03,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.9879518072289157) internal successors, (825), 415 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:03,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 825 transitions. [2021-06-05 07:05:03,256 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 825 transitions. Word has length 30 [2021-06-05 07:05:03,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:03,256 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 825 transitions. [2021-06-05 07:05:03,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:03,256 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 825 transitions. [2021-06-05 07:05:03,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:03,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:03,256 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:03,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:03,457 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:03,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:03,457 INFO L82 PathProgramCache]: Analyzing trace with hash -893712543, now seen corresponding path program 215 times [2021-06-05 07:05:03,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:03,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649029437] [2021-06-05 07:05:03,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:03,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:03,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649029437] [2021-06-05 07:05:03,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649029437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:03,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289951656] [2021-06-05 07:05:03,685 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 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 [2021-06-05 07:05:03,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:05:03,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:03,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:05:03,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:03,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:03,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:03,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:03,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:03,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:05:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:04,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289951656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:04,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:04,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:05:04,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076386258] [2021-06-05 07:05:04,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:05:04,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:04,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:05:04,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:05:04,065 INFO L87 Difference]: Start difference. First operand 416 states and 825 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:05,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:05,139 INFO L93 Difference]: Finished difference Result 492 states and 968 transitions. [2021-06-05 07:05:05,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:05:05,140 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:05:05,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:05,140 INFO L225 Difference]: With dead ends: 492 [2021-06-05 07:05:05,140 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 07:05:05,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1127.7ms TimeCoverageRelationStatistics Valid=205, Invalid=1687, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:05:05,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 07:05:05,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 406. [2021-06-05 07:05:05,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0) internal successors, (810), 405 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:05,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 810 transitions. [2021-06-05 07:05:05,144 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 810 transitions. Word has length 30 [2021-06-05 07:05:05,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:05,144 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 810 transitions. [2021-06-05 07:05:05,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:05,144 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 810 transitions. [2021-06-05 07:05:05,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:05,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:05,145 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:05,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 07:05:05,346 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:05,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:05,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1771720193, now seen corresponding path program 216 times [2021-06-05 07:05:05,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:05,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453355153] [2021-06-05 07:05:05,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:05,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:05,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453355153] [2021-06-05 07:05:05,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453355153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:05,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371798998] [2021-06-05 07:05:05,645 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 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 [2021-06-05 07:05:05,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:05:05,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:05,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:05:05,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:05,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:05:05,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:05,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:05,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:05,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:05:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:05,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371798998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:05,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:05,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:05:05,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358073993] [2021-06-05 07:05:05,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:05:05,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:05,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:05:05,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:05:05,946 INFO L87 Difference]: Start difference. First operand 406 states and 810 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:06,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:06,832 INFO L93 Difference]: Finished difference Result 551 states and 1081 transitions. [2021-06-05 07:05:06,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:05:06,833 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:05:06,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:06,833 INFO L225 Difference]: With dead ends: 551 [2021-06-05 07:05:06,833 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 07:05:06,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 962.7ms TimeCoverageRelationStatistics Valid=183, Invalid=1797, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:05:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 07:05:06,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 401. [2021-06-05 07:05:06,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0025) internal successors, (801), 400 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:06,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 801 transitions. [2021-06-05 07:05:06,837 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 801 transitions. Word has length 30 [2021-06-05 07:05:06,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:06,837 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 801 transitions. [2021-06-05 07:05:06,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:06,837 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 801 transitions. [2021-06-05 07:05:06,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:06,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:06,838 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:07,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 07:05:07,039 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:07,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:07,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1515887267, now seen corresponding path program 217 times [2021-06-05 07:05:07,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:07,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850297233] [2021-06-05 07:05:07,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:07,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:07,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850297233] [2021-06-05 07:05:07,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850297233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:07,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144580246] [2021-06-05 07:05:07,348 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 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 [2021-06-05 07:05:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:07,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:05:07,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:07,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:07,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:07,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:07,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:07,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:05:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:07,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144580246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:07,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:07,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:07,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866653460] [2021-06-05 07:05:07,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:07,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:07,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:07,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:07,746 INFO L87 Difference]: Start difference. First operand 401 states and 801 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:08,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:08,556 INFO L93 Difference]: Finished difference Result 594 states and 1165 transitions. [2021-06-05 07:05:08,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:05:08,557 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:08,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:08,557 INFO L225 Difference]: With dead ends: 594 [2021-06-05 07:05:08,557 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 07:05:08,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 963.4ms TimeCoverageRelationStatistics Valid=225, Invalid=2031, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:05:08,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 07:05:08,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 419. [2021-06-05 07:05:08,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.0) internal successors, (836), 418 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:08,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 836 transitions. [2021-06-05 07:05:08,562 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 836 transitions. Word has length 30 [2021-06-05 07:05:08,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:08,562 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 836 transitions. [2021-06-05 07:05:08,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:08,562 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 836 transitions. [2021-06-05 07:05:08,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:08,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:08,562 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:08,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:08,763 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:08,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:08,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1897014305, now seen corresponding path program 218 times [2021-06-05 07:05:08,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:08,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719966515] [2021-06-05 07:05:08,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:08,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:08,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719966515] [2021-06-05 07:05:08,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719966515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:08,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229654840] [2021-06-05 07:05:08,998 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 [2021-06-05 07:05:09,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:05:09,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:09,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:05:09,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:09,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:09,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:09,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:09,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:09,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:05:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:09,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229654840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:09,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:09,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:09,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794749264] [2021-06-05 07:05:09,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:09,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:09,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:09,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:09,386 INFO L87 Difference]: Start difference. First operand 419 states and 836 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:10,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:10,408 INFO L93 Difference]: Finished difference Result 519 states and 1027 transitions. [2021-06-05 07:05:10,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:05:10,409 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:10,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:10,409 INFO L225 Difference]: With dead ends: 519 [2021-06-05 07:05:10,409 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 07:05:10,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1068.7ms TimeCoverageRelationStatistics Valid=250, Invalid=2102, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:05:10,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 07:05:10,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 417. [2021-06-05 07:05:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0) internal successors, (832), 416 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:10,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 832 transitions. [2021-06-05 07:05:10,413 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 832 transitions. Word has length 30 [2021-06-05 07:05:10,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:10,413 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 832 transitions. [2021-06-05 07:05:10,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:10,413 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 832 transitions. [2021-06-05 07:05:10,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:10,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:10,414 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:10,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:10,614 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:10,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:10,615 INFO L82 PathProgramCache]: Analyzing trace with hash -428347587, now seen corresponding path program 219 times [2021-06-05 07:05:10,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:10,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887545234] [2021-06-05 07:05:10,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:10,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:10,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887545234] [2021-06-05 07:05:10,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887545234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:10,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644993273] [2021-06-05 07:05:10,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 07:05:10,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:05:10,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:10,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:05:10,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:10,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:10,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:10,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:10,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:10,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 07:05:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:11,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644993273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:11,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:11,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:05:11,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182037330] [2021-06-05 07:05:11,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:05:11,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:11,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:05:11,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:05:11,173 INFO L87 Difference]: Start difference. First operand 417 states and 832 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:12,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:12,109 INFO L93 Difference]: Finished difference Result 579 states and 1137 transitions. [2021-06-05 07:05:12,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:05:12,109 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:05:12,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:12,110 INFO L225 Difference]: With dead ends: 579 [2021-06-05 07:05:12,110 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 07:05:12,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 947.6ms TimeCoverageRelationStatistics Valid=255, Invalid=2097, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:05:12,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 07:05:12,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 416. [2021-06-05 07:05:12,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.0) internal successors, (830), 415 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:12,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 830 transitions. [2021-06-05 07:05:12,114 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 830 transitions. Word has length 30 [2021-06-05 07:05:12,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:12,114 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 830 transitions. [2021-06-05 07:05:12,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:12,115 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 830 transitions. [2021-06-05 07:05:12,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:12,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:12,115 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:12,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:12,315 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:12,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:12,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1090691211, now seen corresponding path program 220 times [2021-06-05 07:05:12,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:12,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090847930] [2021-06-05 07:05:12,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:12,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:12,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090847930] [2021-06-05 07:05:12,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090847930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:12,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156130739] [2021-06-05 07:05:12,552 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 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 [2021-06-05 07:05:12,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:05:12,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:12,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:05:12,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:12,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:12,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:12,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:12,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:12,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:05:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:12,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156130739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:12,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:12,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:12,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492571494] [2021-06-05 07:05:12,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:12,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:12,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:12,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:12,921 INFO L87 Difference]: Start difference. First operand 416 states and 830 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:13,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:13,839 INFO L93 Difference]: Finished difference Result 581 states and 1140 transitions. [2021-06-05 07:05:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:05:13,840 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:13,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:13,840 INFO L225 Difference]: With dead ends: 581 [2021-06-05 07:05:13,840 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 07:05:13,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 978.4ms TimeCoverageRelationStatistics Valid=230, Invalid=2122, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:05:13,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 07:05:13,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 403. [2021-06-05 07:05:13,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0024875621890548) internal successors, (805), 402 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:13,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 805 transitions. [2021-06-05 07:05:13,844 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 805 transitions. Word has length 30 [2021-06-05 07:05:13,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:13,844 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 805 transitions. [2021-06-05 07:05:13,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:13,845 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 805 transitions. [2021-06-05 07:05:13,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:13,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:13,845 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:14,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 07:05:14,046 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:14,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:14,046 INFO L82 PathProgramCache]: Analyzing trace with hash -781670967, now seen corresponding path program 221 times [2021-06-05 07:05:14,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:14,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926814474] [2021-06-05 07:05:14,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:14,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:14,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:14,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926814474] [2021-06-05 07:05:14,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926814474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:14,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930705080] [2021-06-05 07:05:14,331 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 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 [2021-06-05 07:05:14,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:05:14,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:14,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:05:14,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:14,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:05:14,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:14,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:14,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:14,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:05:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:14,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930705080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:14,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:14,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:14,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001399298] [2021-06-05 07:05:14,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:14,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:14,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:14,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:14,696 INFO L87 Difference]: Start difference. First operand 403 states and 805 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:15,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:15,678 INFO L93 Difference]: Finished difference Result 614 states and 1203 transitions. [2021-06-05 07:05:15,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:05:15,678 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:15,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:15,679 INFO L225 Difference]: With dead ends: 614 [2021-06-05 07:05:15,679 INFO L226 Difference]: Without dead ends: 605 [2021-06-05 07:05:15,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1023.6ms TimeCoverageRelationStatistics Valid=244, Invalid=2206, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:05:15,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-06-05 07:05:15,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 417. [2021-06-05 07:05:15,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0048076923076925) internal successors, (834), 416 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:15,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 834 transitions. [2021-06-05 07:05:15,683 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 834 transitions. Word has length 30 [2021-06-05 07:05:15,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:15,683 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 834 transitions. [2021-06-05 07:05:15,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:15,683 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 834 transitions. [2021-06-05 07:05:15,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:15,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:15,683 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:15,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 07:05:15,884 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:15,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:15,884 INFO L82 PathProgramCache]: Analyzing trace with hash 100394757, now seen corresponding path program 222 times [2021-06-05 07:05:15,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:15,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186906549] [2021-06-05 07:05:15,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:16,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:16,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186906549] [2021-06-05 07:05:16,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186906549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:16,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50162458] [2021-06-05 07:05:16,120 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 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 [2021-06-05 07:05:16,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:05:16,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:16,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:05:16,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:16,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:05:16,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:16,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:16,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:16,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:05:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:16,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50162458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:16,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:16,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:16,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040606449] [2021-06-05 07:05:16,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:16,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:16,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:16,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:16,507 INFO L87 Difference]: Start difference. First operand 417 states and 834 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:17,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:17,614 INFO L93 Difference]: Finished difference Result 529 states and 1043 transitions. [2021-06-05 07:05:17,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:05:17,615 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:17,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:17,615 INFO L225 Difference]: With dead ends: 529 [2021-06-05 07:05:17,615 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 07:05:17,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1150.0ms TimeCoverageRelationStatistics Valid=274, Invalid=2276, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:05:17,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 07:05:17,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 415. [2021-06-05 07:05:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.004830917874396) internal successors, (830), 414 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:17,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 830 transitions. [2021-06-05 07:05:17,619 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 830 transitions. Word has length 30 [2021-06-05 07:05:17,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:17,619 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 830 transitions. [2021-06-05 07:05:17,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:17,619 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 830 transitions. [2021-06-05 07:05:17,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:17,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:17,620 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:17,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 07:05:17,820 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:17,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:17,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1569061475, now seen corresponding path program 223 times [2021-06-05 07:05:17,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:17,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203501067] [2021-06-05 07:05:17,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:18,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:18,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203501067] [2021-06-05 07:05:18,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203501067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:18,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146615447] [2021-06-05 07:05:18,073 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 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 [2021-06-05 07:05:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:18,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:05:18,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:18,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:18,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:18,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:18,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:18,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:05:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:18,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146615447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:18,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:18,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:05:18,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517560164] [2021-06-05 07:05:18,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:05:18,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:18,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:05:18,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:05:18,397 INFO L87 Difference]: Start difference. First operand 415 states and 830 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:19,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:19,624 INFO L93 Difference]: Finished difference Result 609 states and 1196 transitions. [2021-06-05 07:05:19,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:05:19,624 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:05:19,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:19,625 INFO L225 Difference]: With dead ends: 609 [2021-06-05 07:05:19,625 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 07:05:19,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1081.9ms TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:05:19,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 07:05:19,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 424. [2021-06-05 07:05:19,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.0) internal successors, (846), 423 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 846 transitions. [2021-06-05 07:05:19,629 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 846 transitions. Word has length 30 [2021-06-05 07:05:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:19,629 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 846 transitions. [2021-06-05 07:05:19,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:19,629 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 846 transitions. [2021-06-05 07:05:19,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:19,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:19,630 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:19,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 07:05:19,830 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:19,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:19,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1206867023, now seen corresponding path program 224 times [2021-06-05 07:05:19,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:19,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110628934] [2021-06-05 07:05:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:20,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:20,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:20,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110628934] [2021-06-05 07:05:20,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110628934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:20,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29138627] [2021-06-05 07:05:20,058 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 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 [2021-06-05 07:05:20,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:05:20,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:20,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:05:20,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:20,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:20,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:20,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:20,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:20,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:05:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:20,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29138627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:20,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:20,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:20,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996923156] [2021-06-05 07:05:20,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:20,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:20,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:20,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:20,423 INFO L87 Difference]: Start difference. First operand 424 states and 846 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:21,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:21,555 INFO L93 Difference]: Finished difference Result 608 states and 1193 transitions. [2021-06-05 07:05:21,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:05:21,555 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:21,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:21,555 INFO L225 Difference]: With dead ends: 608 [2021-06-05 07:05:21,555 INFO L226 Difference]: Without dead ends: 564 [2021-06-05 07:05:21,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1086.4ms TimeCoverageRelationStatistics Valid=289, Invalid=2681, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:05:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-06-05 07:05:21,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 414. [2021-06-05 07:05:21,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.9903147699757868) internal successors, (822), 413 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 822 transitions. [2021-06-05 07:05:21,560 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 822 transitions. Word has length 30 [2021-06-05 07:05:21,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:21,560 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 822 transitions. [2021-06-05 07:05:21,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:21,560 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 822 transitions. [2021-06-05 07:05:21,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:21,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:21,560 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:21,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 07:05:21,765 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:21,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:21,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1837287431, now seen corresponding path program 225 times [2021-06-05 07:05:21,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:21,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435740017] [2021-06-05 07:05:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:22,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:22,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435740017] [2021-06-05 07:05:22,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435740017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:22,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853855803] [2021-06-05 07:05:22,022 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 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 [2021-06-05 07:05:22,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:05:22,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:22,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:05:22,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:22,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:05:22,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:22,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:22,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:22,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:05:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:22,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853855803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:22,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:22,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:22,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99377268] [2021-06-05 07:05:22,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:22,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:22,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:22,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:22,427 INFO L87 Difference]: Start difference. First operand 414 states and 822 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:23,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:23,249 INFO L93 Difference]: Finished difference Result 561 states and 1095 transitions. [2021-06-05 07:05:23,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:05:23,250 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:23,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:23,250 INFO L225 Difference]: With dead ends: 561 [2021-06-05 07:05:23,250 INFO L226 Difference]: Without dead ends: 552 [2021-06-05 07:05:23,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 980.9ms TimeCoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:05:23,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-05 07:05:23,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 416. [2021-06-05 07:05:23,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.9879518072289157) internal successors, (825), 415 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:23,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 825 transitions. [2021-06-05 07:05:23,254 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 825 transitions. Word has length 30 [2021-06-05 07:05:23,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:23,254 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 825 transitions. [2021-06-05 07:05:23,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:23,254 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 825 transitions. [2021-06-05 07:05:23,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:23,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:23,255 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:23,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:23,456 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:23,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:23,456 INFO L82 PathProgramCache]: Analyzing trace with hash -955221707, now seen corresponding path program 226 times [2021-06-05 07:05:23,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:23,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956377755] [2021-06-05 07:05:23,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:23,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:23,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956377755] [2021-06-05 07:05:23,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956377755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:23,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958784253] [2021-06-05 07:05:23,764 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 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 [2021-06-05 07:05:23,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:05:23,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:23,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:05:23,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:23,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:23,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:23,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:23,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:23,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:05:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:24,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958784253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:24,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:24,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:24,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924187679] [2021-06-05 07:05:24,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:24,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:24,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:24,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:24,186 INFO L87 Difference]: Start difference. First operand 416 states and 825 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:25,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:25,063 INFO L93 Difference]: Finished difference Result 477 states and 938 transitions. [2021-06-05 07:05:25,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:05:25,063 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:25,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:25,064 INFO L225 Difference]: With dead ends: 477 [2021-06-05 07:05:25,064 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 07:05:25,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1210.1ms TimeCoverageRelationStatistics Valid=242, Invalid=2110, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:05:25,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 07:05:25,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 406. [2021-06-05 07:05:25,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0) internal successors, (810), 405 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:25,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 810 transitions. [2021-06-05 07:05:25,067 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 810 transitions. Word has length 30 [2021-06-05 07:05:25,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:25,067 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 810 transitions. [2021-06-05 07:05:25,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:25,067 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 810 transitions. [2021-06-05 07:05:25,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:25,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:25,068 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:25,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 07:05:25,268 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:25,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:25,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1833229357, now seen corresponding path program 227 times [2021-06-05 07:05:25,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:25,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970170998] [2021-06-05 07:05:25,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:25,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:25,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:25,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970170998] [2021-06-05 07:05:25,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970170998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:25,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512878782] [2021-06-05 07:05:25,491 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 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 [2021-06-05 07:05:25,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:05:25,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:25,516 WARN L261 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 07:05:25,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:25,820 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 07:05:25,821 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 25 treesize of output 13 [2021-06-05 07:05:25,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:25,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:25,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:25,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:18 [2021-06-05 07:05:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:25,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512878782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:25,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:25,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:25,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490995310] [2021-06-05 07:05:25,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:25,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:25,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:25,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:25,918 INFO L87 Difference]: Start difference. First operand 406 states and 810 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:26,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:26,985 INFO L93 Difference]: Finished difference Result 561 states and 1100 transitions. [2021-06-05 07:05:26,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:05:26,986 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:26,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:26,986 INFO L225 Difference]: With dead ends: 561 [2021-06-05 07:05:26,986 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 07:05:26,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1196.5ms TimeCoverageRelationStatistics Valid=266, Invalid=2284, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:05:26,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 07:05:26,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 402. [2021-06-05 07:05:26,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.002493765586035) internal successors, (803), 401 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:26,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 803 transitions. [2021-06-05 07:05:26,990 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 803 transitions. Word has length 30 [2021-06-05 07:05:26,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:26,990 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 803 transitions. [2021-06-05 07:05:26,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:26,990 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 803 transitions. [2021-06-05 07:05:26,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:26,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:26,991 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:27,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:27,191 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:27,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:27,192 INFO L82 PathProgramCache]: Analyzing trace with hash -2002474823, now seen corresponding path program 228 times [2021-06-05 07:05:27,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:27,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601189023] [2021-06-05 07:05:27,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:27,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:27,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601189023] [2021-06-05 07:05:27,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601189023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:27,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654255175] [2021-06-05 07:05:27,489 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 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 [2021-06-05 07:05:27,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:05:27,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:27,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:05:27,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:27,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:05:27,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:27,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:27,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:27,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:05:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:27,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654255175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:27,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:27,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:27,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586471528] [2021-06-05 07:05:27,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:27,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:27,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:27,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:27,850 INFO L87 Difference]: Start difference. First operand 402 states and 803 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:28,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:28,854 INFO L93 Difference]: Finished difference Result 625 states and 1226 transitions. [2021-06-05 07:05:28,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:05:28,854 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:28,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:28,855 INFO L225 Difference]: With dead ends: 625 [2021-06-05 07:05:28,855 INFO L226 Difference]: Without dead ends: 616 [2021-06-05 07:05:28,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 967.0ms TimeCoverageRelationStatistics Valid=245, Invalid=2205, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:05:28,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-05 07:05:28,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 417. [2021-06-05 07:05:28,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0072115384615383) internal successors, (835), 416 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:28,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 835 transitions. [2021-06-05 07:05:28,863 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 835 transitions. Word has length 30 [2021-06-05 07:05:28,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:28,863 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 835 transitions. [2021-06-05 07:05:28,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:28,863 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 835 transitions. [2021-06-05 07:05:28,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:28,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:28,864 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:29,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:29,064 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:29,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:29,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1120409099, now seen corresponding path program 229 times [2021-06-05 07:05:29,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:29,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967612586] [2021-06-05 07:05:29,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:29,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:29,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967612586] [2021-06-05 07:05:29,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967612586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:29,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227445265] [2021-06-05 07:05:29,298 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 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 [2021-06-05 07:05:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:29,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:05:29,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:29,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:29,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:29,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:29,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:29,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:05:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:29,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227445265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:29,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:29,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:29,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879378065] [2021-06-05 07:05:29,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:29,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:29,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:29,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:29,657 INFO L87 Difference]: Start difference. First operand 417 states and 835 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:30,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:30,804 INFO L93 Difference]: Finished difference Result 533 states and 1052 transitions. [2021-06-05 07:05:30,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:05:30,804 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:30,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:30,804 INFO L225 Difference]: With dead ends: 533 [2021-06-05 07:05:30,804 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 07:05:30,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1097.5ms TimeCoverageRelationStatistics Valid=275, Invalid=2275, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:05:30,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 07:05:30,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 415. [2021-06-05 07:05:30,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.0072463768115942) internal successors, (831), 414 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:30,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 831 transitions. [2021-06-05 07:05:30,808 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 831 transitions. Word has length 30 [2021-06-05 07:05:30,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:30,808 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 831 transitions. [2021-06-05 07:05:30,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:30,808 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 831 transitions. [2021-06-05 07:05:30,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:30,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:30,809 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:31,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:31,009 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:31,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:31,009 INFO L82 PathProgramCache]: Analyzing trace with hash 348257619, now seen corresponding path program 230 times [2021-06-05 07:05:31,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:31,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261520232] [2021-06-05 07:05:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:31,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:31,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261520232] [2021-06-05 07:05:31,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261520232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:31,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838145083] [2021-06-05 07:05:31,231 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 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 [2021-06-05 07:05:31,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:05:31,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:31,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:05:31,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:31,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:31,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:31,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:31,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:31,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:05:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:31,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838145083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:31,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:31,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:05:31,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692247224] [2021-06-05 07:05:31,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:05:31,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:31,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:05:31,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:05:31,542 INFO L87 Difference]: Start difference. First operand 415 states and 831 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:32,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:32,708 INFO L93 Difference]: Finished difference Result 654 states and 1279 transitions. [2021-06-05 07:05:32,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:05:32,708 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:05:32,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:32,709 INFO L225 Difference]: With dead ends: 654 [2021-06-05 07:05:32,709 INFO L226 Difference]: Without dead ends: 637 [2021-06-05 07:05:32,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1041.5ms TimeCoverageRelationStatistics Valid=274, Invalid=2482, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:05:32,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-06-05 07:05:32,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 424. [2021-06-05 07:05:32,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.0023640661938535) internal successors, (847), 423 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:32,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 847 transitions. [2021-06-05 07:05:32,713 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 847 transitions. Word has length 30 [2021-06-05 07:05:32,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:32,713 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 847 transitions. [2021-06-05 07:05:32,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:32,713 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 847 transitions. [2021-06-05 07:05:32,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:32,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:32,714 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:32,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:32,914 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:32,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:32,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1867296417, now seen corresponding path program 231 times [2021-06-05 07:05:32,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:32,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956687219] [2021-06-05 07:05:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:33,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:33,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956687219] [2021-06-05 07:05:33,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956687219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:33,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394411439] [2021-06-05 07:05:33,137 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 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 [2021-06-05 07:05:33,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:05:33,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:33,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:05:33,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:33,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:33,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:33,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:33,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:33,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 07:05:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:33,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394411439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:33,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:33,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:33,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550346139] [2021-06-05 07:05:33,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:33,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:33,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:33,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:33,483 INFO L87 Difference]: Start difference. First operand 424 states and 847 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:34,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:34,654 INFO L93 Difference]: Finished difference Result 653 states and 1276 transitions. [2021-06-05 07:05:34,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:05:34,655 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:34,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:34,655 INFO L225 Difference]: With dead ends: 653 [2021-06-05 07:05:34,655 INFO L226 Difference]: Without dead ends: 609 [2021-06-05 07:05:34,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1141.6ms TimeCoverageRelationStatistics Valid=321, Invalid=2871, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:05:34,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-06-05 07:05:34,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 414. [2021-06-05 07:05:34,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.9927360774818401) internal successors, (823), 413 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:34,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 823 transitions. [2021-06-05 07:05:34,659 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 823 transitions. Word has length 30 [2021-06-05 07:05:34,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:34,659 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 823 transitions. [2021-06-05 07:05:34,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:34,660 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 823 transitions. [2021-06-05 07:05:34,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:34,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:34,660 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:34,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 07:05:34,860 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:34,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:34,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1236876009, now seen corresponding path program 232 times [2021-06-05 07:05:34,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:34,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285069676] [2021-06-05 07:05:34,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:35,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:35,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285069676] [2021-06-05 07:05:35,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285069676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:35,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135388124] [2021-06-05 07:05:35,097 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 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 [2021-06-05 07:05:35,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:05:35,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:35,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:05:35,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:35,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:35,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:35,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:35,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:35,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:05:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:35,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135388124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:35,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:35,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:35,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642901046] [2021-06-05 07:05:35,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:35,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:35,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:35,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:35,474 INFO L87 Difference]: Start difference. First operand 414 states and 823 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:36,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:36,282 INFO L93 Difference]: Finished difference Result 580 states and 1134 transitions. [2021-06-05 07:05:36,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:05:36,282 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:36,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:36,283 INFO L225 Difference]: With dead ends: 580 [2021-06-05 07:05:36,283 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 07:05:36,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 924.9ms TimeCoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:05:36,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 07:05:36,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 416. [2021-06-05 07:05:36,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.9903614457831325) internal successors, (826), 415 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 826 transitions. [2021-06-05 07:05:36,286 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 826 transitions. Word has length 30 [2021-06-05 07:05:36,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:36,287 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 826 transitions. [2021-06-05 07:05:36,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:36,287 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 826 transitions. [2021-06-05 07:05:36,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:36,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:36,287 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:36,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 07:05:36,487 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:36,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:36,488 INFO L82 PathProgramCache]: Analyzing trace with hash 2118941733, now seen corresponding path program 233 times [2021-06-05 07:05:36,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:36,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309080104] [2021-06-05 07:05:36,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:36,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:36,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:36,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309080104] [2021-06-05 07:05:36,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309080104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:36,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2925073] [2021-06-05 07:05:36,726 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 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 [2021-06-05 07:05:36,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:05:36,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:36,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:05:36,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:36,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:36,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:36,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:36,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:36,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:05:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:37,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2925073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:37,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:37,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:37,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535342733] [2021-06-05 07:05:37,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:37,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:37,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:37,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:37,147 INFO L87 Difference]: Start difference. First operand 416 states and 826 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:38,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:38,127 INFO L93 Difference]: Finished difference Result 486 states and 957 transitions. [2021-06-05 07:05:38,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:05:38,128 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:38,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:38,128 INFO L225 Difference]: With dead ends: 486 [2021-06-05 07:05:38,128 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 07:05:38,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1116.8ms TimeCoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:05:38,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 07:05:38,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 406. [2021-06-05 07:05:38,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0024691358024693) internal successors, (811), 405 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:38,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 811 transitions. [2021-06-05 07:05:38,132 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 811 transitions. Word has length 30 [2021-06-05 07:05:38,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:38,132 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 811 transitions. [2021-06-05 07:05:38,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:38,132 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 811 transitions. [2021-06-05 07:05:38,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:38,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:38,133 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:38,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 07:05:38,333 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:38,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:38,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1240934083, now seen corresponding path program 234 times [2021-06-05 07:05:38,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:38,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523299624] [2021-06-05 07:05:38,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:38,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:38,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523299624] [2021-06-05 07:05:38,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523299624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:38,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598692794] [2021-06-05 07:05:38,566 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 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 [2021-06-05 07:05:38,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:05:38,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:38,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:05:38,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:38,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:05:38,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:38,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:38,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:38,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:05:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:38,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598692794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:38,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:38,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:38,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421147462] [2021-06-05 07:05:38,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:38,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:38,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:38,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:38,950 INFO L87 Difference]: Start difference. First operand 406 states and 811 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:39,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:39,750 INFO L93 Difference]: Finished difference Result 577 states and 1135 transitions. [2021-06-05 07:05:39,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:05:39,750 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:39,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:39,751 INFO L225 Difference]: With dead ends: 577 [2021-06-05 07:05:39,751 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 07:05:39,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 957.1ms TimeCoverageRelationStatistics Valid=220, Invalid=2036, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:05:39,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 07:05:39,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 403. [2021-06-05 07:05:39,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0049751243781095) internal successors, (806), 402 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 806 transitions. [2021-06-05 07:05:39,755 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 806 transitions. Word has length 30 [2021-06-05 07:05:39,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:39,755 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 806 transitions. [2021-06-05 07:05:39,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 806 transitions. [2021-06-05 07:05:39,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:39,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:39,755 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:39,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 07:05:39,956 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:39,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:39,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1727071587, now seen corresponding path program 235 times [2021-06-05 07:05:39,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:39,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336538218] [2021-06-05 07:05:39,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:40,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:40,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336538218] [2021-06-05 07:05:40,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336538218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:40,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861502631] [2021-06-05 07:05:40,195 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 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 [2021-06-05 07:05:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:40,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:05:40,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:40,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:40,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:40,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:40,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:40,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:05:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:40,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861502631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:40,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:40,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:40,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308807740] [2021-06-05 07:05:40,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:40,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:40,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:40,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:40,579 INFO L87 Difference]: Start difference. First operand 403 states and 806 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:41,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:41,331 INFO L93 Difference]: Finished difference Result 575 states and 1123 transitions. [2021-06-05 07:05:41,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:05:41,331 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:41,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:41,332 INFO L225 Difference]: With dead ends: 575 [2021-06-05 07:05:41,332 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 07:05:41,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 941.1ms TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:05:41,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 07:05:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 417. [2021-06-05 07:05:41,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0) internal successors, (832), 416 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:41,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 832 transitions. [2021-06-05 07:05:41,341 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 832 transitions. Word has length 30 [2021-06-05 07:05:41,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:41,341 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 832 transitions. [2021-06-05 07:05:41,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:41,341 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 832 transitions. [2021-06-05 07:05:41,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:41,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:41,341 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:41,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:41,542 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:41,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:41,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1685829985, now seen corresponding path program 236 times [2021-06-05 07:05:41,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:41,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764805847] [2021-06-05 07:05:41,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:41,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:41,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764805847] [2021-06-05 07:05:41,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764805847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:41,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426085354] [2021-06-05 07:05:41,786 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 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 [2021-06-05 07:05:41,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:05:41,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:41,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:05:41,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:41,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:41,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:41,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:41,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:41,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:05:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:42,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426085354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:42,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:42,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:42,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878605739] [2021-06-05 07:05:42,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:42,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:42,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:42,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:42,208 INFO L87 Difference]: Start difference. First operand 417 states and 832 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:43,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:43,197 INFO L93 Difference]: Finished difference Result 490 states and 965 transitions. [2021-06-05 07:05:43,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:05:43,198 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:43,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:43,198 INFO L225 Difference]: With dead ends: 490 [2021-06-05 07:05:43,198 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 07:05:43,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1112.4ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:05:43,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 07:05:43,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 415. [2021-06-05 07:05:43,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.0) internal successors, (828), 414 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:43,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 828 transitions. [2021-06-05 07:05:43,204 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 828 transitions. Word has length 30 [2021-06-05 07:05:43,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:43,204 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 828 transitions. [2021-06-05 07:05:43,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:43,204 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 828 transitions. [2021-06-05 07:05:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:43,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:43,204 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:43,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 07:05:43,413 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:43,413 INFO L82 PathProgramCache]: Analyzing trace with hash -217163267, now seen corresponding path program 237 times [2021-06-05 07:05:43,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:43,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372222033] [2021-06-05 07:05:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:43,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:43,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:43,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372222033] [2021-06-05 07:05:43,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372222033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:43,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735511735] [2021-06-05 07:05:43,641 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 [2021-06-05 07:05:43,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:05:43,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:43,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:05:43,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:43,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:05:43,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:43,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:43,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:43,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:05:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:43,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735511735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:43,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:43,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:05:43,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208784721] [2021-06-05 07:05:43,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:05:43,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:43,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:05:43,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:05:43,967 INFO L87 Difference]: Start difference. First operand 415 states and 828 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:44,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:44,780 INFO L93 Difference]: Finished difference Result 574 states and 1125 transitions. [2021-06-05 07:05:44,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:05:44,781 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:05:44,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:44,781 INFO L225 Difference]: With dead ends: 574 [2021-06-05 07:05:44,781 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 07:05:44,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 849.3ms TimeCoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:05:44,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 07:05:44,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 407. [2021-06-05 07:05:44,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0) internal successors, (812), 406 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:44,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 812 transitions. [2021-06-05 07:05:44,785 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 812 transitions. Word has length 30 [2021-06-05 07:05:44,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:44,785 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 812 transitions. [2021-06-05 07:05:44,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:44,785 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 812 transitions. [2021-06-05 07:05:44,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:44,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:44,786 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:44,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:44,989 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:44,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:44,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1731129661, now seen corresponding path program 238 times [2021-06-05 07:05:44,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:44,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084998091] [2021-06-05 07:05:44,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:45,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:45,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084998091] [2021-06-05 07:05:45,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084998091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:45,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307230655] [2021-06-05 07:05:45,214 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 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 [2021-06-05 07:05:45,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:05:45,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:45,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:05:45,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:45,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:45,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:45,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:45,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:45,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:05:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:45,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307230655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:45,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:45,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:45,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932985434] [2021-06-05 07:05:45,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:45,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:45,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:45,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:45,590 INFO L87 Difference]: Start difference. First operand 407 states and 812 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:46,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:46,356 INFO L93 Difference]: Finished difference Result 557 states and 1094 transitions. [2021-06-05 07:05:46,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:05:46,357 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:46,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:46,357 INFO L225 Difference]: With dead ends: 557 [2021-06-05 07:05:46,357 INFO L226 Difference]: Without dead ends: 524 [2021-06-05 07:05:46,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 885.8ms TimeCoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:05:46,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-05 07:05:46,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 405. [2021-06-05 07:05:46,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.0) internal successors, (808), 404 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:46,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 808 transitions. [2021-06-05 07:05:46,361 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 808 transitions. Word has length 30 [2021-06-05 07:05:46,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:46,361 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 808 transitions. [2021-06-05 07:05:46,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:46,361 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 808 transitions. [2021-06-05 07:05:46,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:46,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:46,362 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:46,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:46,563 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:46,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:46,563 INFO L82 PathProgramCache]: Analyzing trace with hash -608379079, now seen corresponding path program 239 times [2021-06-05 07:05:46,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:46,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926367113] [2021-06-05 07:05:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:46,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:46,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926367113] [2021-06-05 07:05:46,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926367113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:46,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680453738] [2021-06-05 07:05:46,872 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 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 [2021-06-05 07:05:46,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:05:46,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:46,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:05:46,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:47,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:05:47,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:47,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:47,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:47,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:05:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:47,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680453738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:47,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:47,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 07:05:47,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326498922] [2021-06-05 07:05:47,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:05:47,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:47,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:05:47,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:05:47,294 INFO L87 Difference]: Start difference. First operand 405 states and 808 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:48,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:48,097 INFO L93 Difference]: Finished difference Result 555 states and 1090 transitions. [2021-06-05 07:05:48,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:05:48,097 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:05:48,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:48,098 INFO L225 Difference]: With dead ends: 555 [2021-06-05 07:05:48,098 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 07:05:48,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1017.1ms TimeCoverageRelationStatistics Valid=219, Invalid=2231, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:05:48,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 07:05:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 400. [2021-06-05 07:05:48,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0025062656641603) internal successors, (799), 399 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:48,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 799 transitions. [2021-06-05 07:05:48,102 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 799 transitions. Word has length 30 [2021-06-05 07:05:48,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:48,102 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 799 transitions. [2021-06-05 07:05:48,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:48,102 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 799 transitions. [2021-06-05 07:05:48,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:48,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:48,102 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:48,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:48,303 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:48,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:48,303 INFO L82 PathProgramCache]: Analyzing trace with hash 849453459, now seen corresponding path program 240 times [2021-06-05 07:05:48,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:48,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11394588] [2021-06-05 07:05:48,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:48,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:48,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11394588] [2021-06-05 07:05:48,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11394588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:48,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471424828] [2021-06-05 07:05:48,539 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 [2021-06-05 07:05:48,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:05:48,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:48,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:05:48,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:48,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:05:48,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:48,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:48,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:48,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:05:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:48,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471424828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:48,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:48,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:48,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506884791] [2021-06-05 07:05:48,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:48,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:48,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:48,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:48,913 INFO L87 Difference]: Start difference. First operand 400 states and 799 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:49,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:49,783 INFO L93 Difference]: Finished difference Result 586 states and 1151 transitions. [2021-06-05 07:05:49,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:05:49,783 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:49,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:49,783 INFO L225 Difference]: With dead ends: 586 [2021-06-05 07:05:49,783 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 07:05:49,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 916.2ms TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:05:49,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 07:05:49,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 421. [2021-06-05 07:05:49,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.0) internal successors, (840), 420 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:49,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 840 transitions. [2021-06-05 07:05:49,788 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 840 transitions. Word has length 30 [2021-06-05 07:05:49,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:49,788 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 840 transitions. [2021-06-05 07:05:49,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:49,788 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 840 transitions. [2021-06-05 07:05:49,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:49,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:49,788 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:49,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:49,989 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:49,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:49,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1731519183, now seen corresponding path program 241 times [2021-06-05 07:05:49,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:49,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300883932] [2021-06-05 07:05:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:50,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:50,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300883932] [2021-06-05 07:05:50,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300883932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:50,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82873149] [2021-06-05 07:05:50,218 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 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 [2021-06-05 07:05:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:50,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:05:50,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:50,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:50,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:50,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:50,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:50,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:05:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:50,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82873149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:50,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:50,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:50,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908520067] [2021-06-05 07:05:50,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:50,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:50,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:50,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:50,592 INFO L87 Difference]: Start difference. First operand 421 states and 840 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:51,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:51,581 INFO L93 Difference]: Finished difference Result 509 states and 1009 transitions. [2021-06-05 07:05:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:05:51,581 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:51,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:51,582 INFO L225 Difference]: With dead ends: 509 [2021-06-05 07:05:51,582 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 07:05:51,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1048.3ms TimeCoverageRelationStatistics Valid=258, Invalid=2192, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:05:51,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 07:05:51,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 419. [2021-06-05 07:05:51,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.0) internal successors, (836), 418 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:51,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 836 transitions. [2021-06-05 07:05:51,585 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 836 transitions. Word has length 30 [2021-06-05 07:05:51,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:51,585 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 836 transitions. [2021-06-05 07:05:51,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:51,585 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 836 transitions. [2021-06-05 07:05:51,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:51,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:51,586 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:51,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-06-05 07:05:51,786 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:51,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:51,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1094781395, now seen corresponding path program 242 times [2021-06-05 07:05:51,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:51,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631313807] [2021-06-05 07:05:51,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:52,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:52,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631313807] [2021-06-05 07:05:52,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631313807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:52,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412227792] [2021-06-05 07:05:52,016 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 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 [2021-06-05 07:05:52,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:05:52,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:52,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:05:52,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:52,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:52,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:52,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:52,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:52,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:05:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:52,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412227792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:52,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:52,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:05:52,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860941633] [2021-06-05 07:05:52,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:05:52,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:52,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:05:52,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:05:52,352 INFO L87 Difference]: Start difference. First operand 419 states and 836 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:53,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:53,218 INFO L93 Difference]: Finished difference Result 571 states and 1123 transitions. [2021-06-05 07:05:53,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:05:53,219 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:05:53,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:53,219 INFO L225 Difference]: With dead ends: 571 [2021-06-05 07:05:53,219 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 07:05:53,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 864.4ms TimeCoverageRelationStatistics Valid=214, Invalid=1856, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:05:53,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 07:05:53,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 418. [2021-06-05 07:05:53,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.0) internal successors, (834), 417 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:53,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 834 transitions. [2021-06-05 07:05:53,223 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 834 transitions. Word has length 30 [2021-06-05 07:05:53,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:53,224 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 834 transitions. [2021-06-05 07:05:53,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 834 transitions. [2021-06-05 07:05:53,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:53,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:53,224 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:53,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-05 07:05:53,429 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:53,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:53,429 INFO L82 PathProgramCache]: Analyzing trace with hash 424257403, now seen corresponding path program 243 times [2021-06-05 07:05:53,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:53,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466044116] [2021-06-05 07:05:53,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:53,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:53,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466044116] [2021-06-05 07:05:53,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466044116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:53,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547739309] [2021-06-05 07:05:53,666 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 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 [2021-06-05 07:05:53,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:05:53,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:53,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:05:53,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:53,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:53,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:53,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:53,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:53,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 07:05:54,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:54,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547739309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:54,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:54,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:54,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884331892] [2021-06-05 07:05:54,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:54,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:54,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:54,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:54,046 INFO L87 Difference]: Start difference. First operand 418 states and 834 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:54,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:54,802 INFO L93 Difference]: Finished difference Result 574 states and 1128 transitions. [2021-06-05 07:05:54,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:05:54,803 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:54,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:54,804 INFO L225 Difference]: With dead ends: 574 [2021-06-05 07:05:54,804 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 07:05:54,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 914.5ms TimeCoverageRelationStatistics Valid=219, Invalid=2037, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:05:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 07:05:54,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 405. [2021-06-05 07:05:54,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.0024752475247523) internal successors, (809), 404 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:54,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 809 transitions. [2021-06-05 07:05:54,810 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 809 transitions. Word has length 30 [2021-06-05 07:05:54,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:54,810 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 809 transitions. [2021-06-05 07:05:54,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:54,810 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 809 transitions. [2021-06-05 07:05:54,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:54,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:54,811 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:55,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:55,017 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:55,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:55,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1448104775, now seen corresponding path program 244 times [2021-06-05 07:05:55,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:55,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391507221] [2021-06-05 07:05:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:55,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:55,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391507221] [2021-06-05 07:05:55,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391507221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:55,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943784720] [2021-06-05 07:05:55,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 07:05:55,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:05:55,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:55,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:05:55,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:55,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:05:55,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:55,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:55,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:55,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:05:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:55,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943784720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:55,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:55,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:55,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027284029] [2021-06-05 07:05:55,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:55,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:55,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:55,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:55,634 INFO L87 Difference]: Start difference. First operand 405 states and 809 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:56,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:56,541 INFO L93 Difference]: Finished difference Result 612 states and 1199 transitions. [2021-06-05 07:05:56,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:05:56,542 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:56,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:56,542 INFO L225 Difference]: With dead ends: 612 [2021-06-05 07:05:56,542 INFO L226 Difference]: Without dead ends: 603 [2021-06-05 07:05:56,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1050.0ms TimeCoverageRelationStatistics Valid=252, Invalid=2400, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:05:56,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-06-05 07:05:56,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 419. [2021-06-05 07:05:56,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.0047846889952154) internal successors, (838), 418 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:56,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 838 transitions. [2021-06-05 07:05:56,547 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 838 transitions. Word has length 30 [2021-06-05 07:05:56,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:56,547 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 838 transitions. [2021-06-05 07:05:56,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:56,547 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 838 transitions. [2021-06-05 07:05:56,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:56,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:56,547 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:56,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 07:05:56,748 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:56,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:56,748 INFO L82 PathProgramCache]: Analyzing trace with hash -566039051, now seen corresponding path program 245 times [2021-06-05 07:05:56,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:56,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426211193] [2021-06-05 07:05:56,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:56,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:56,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426211193] [2021-06-05 07:05:56,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426211193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:56,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709265969] [2021-06-05 07:05:56,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 07:05:57,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:05:57,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:57,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:05:57,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:57,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:05:57,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:57,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:57,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:57,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:05:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:57,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709265969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:57,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:57,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:05:57,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572784431] [2021-06-05 07:05:57,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:05:57,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:57,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:05:57,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:05:57,375 INFO L87 Difference]: Start difference. First operand 419 states and 838 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:58,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:58,561 INFO L93 Difference]: Finished difference Result 526 states and 1037 transitions. [2021-06-05 07:05:58,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:05:58,561 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:05:58,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:58,562 INFO L225 Difference]: With dead ends: 526 [2021-06-05 07:05:58,562 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 07:05:58,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1211.7ms TimeCoverageRelationStatistics Valid=286, Invalid=2470, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:05:58,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 07:05:58,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 417. [2021-06-05 07:05:58,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0048076923076925) internal successors, (834), 416 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:58,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 834 transitions. [2021-06-05 07:05:58,566 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 834 transitions. Word has length 30 [2021-06-05 07:05:58,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:58,566 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 834 transitions. [2021-06-05 07:05:58,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:58,566 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 834 transitions. [2021-06-05 07:05:58,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:05:58,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:58,566 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:58,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 07:05:58,767 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:58,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:58,767 INFO L82 PathProgramCache]: Analyzing trace with hash 902627667, now seen corresponding path program 246 times [2021-06-05 07:05:58,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:58,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503278581] [2021-06-05 07:05:58,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:58,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:58,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503278581] [2021-06-05 07:05:58,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503278581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:58,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794867272] [2021-06-05 07:05:58,990 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 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 [2021-06-05 07:05:59,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:05:59,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:59,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:05:59,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:59,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:05:59,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:59,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:59,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:05:59,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:05:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:59,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794867272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:59,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:59,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:05:59,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023843385] [2021-06-05 07:05:59,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:05:59,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:59,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:05:59,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:05:59,335 INFO L87 Difference]: Start difference. First operand 417 states and 834 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:00,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:00,471 INFO L93 Difference]: Finished difference Result 610 states and 1198 transitions. [2021-06-05 07:06:00,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:06:00,471 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:06:00,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:00,471 INFO L225 Difference]: With dead ends: 610 [2021-06-05 07:06:00,471 INFO L226 Difference]: Without dead ends: 593 [2021-06-05 07:06:00,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1092.9ms TimeCoverageRelationStatistics Valid=268, Invalid=2488, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:06:00,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-06-05 07:06:00,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 426. [2021-06-05 07:06:00,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.0) internal successors, (850), 425 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:00,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 850 transitions. [2021-06-05 07:06:00,476 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 850 transitions. Word has length 30 [2021-06-05 07:06:00,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:00,476 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 850 transitions. [2021-06-05 07:06:00,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:00,476 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 850 transitions. [2021-06-05 07:06:00,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:00,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:00,476 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:00,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-06-05 07:06:00,678 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:00,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:00,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1873300831, now seen corresponding path program 247 times [2021-06-05 07:06:00,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:00,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444966097] [2021-06-05 07:06:00,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:00,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:00,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444966097] [2021-06-05 07:06:00,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444966097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:00,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247042945] [2021-06-05 07:06:00,906 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 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 [2021-06-05 07:06:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:00,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:00,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:01,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:06:01,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:01,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:01,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:01,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:06:01,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:01,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247042945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:01,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:01,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:01,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683033156] [2021-06-05 07:06:01,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:01,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:01,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:01,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:01,270 INFO L87 Difference]: Start difference. First operand 426 states and 850 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:02,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:02,459 INFO L93 Difference]: Finished difference Result 609 states and 1195 transitions. [2021-06-05 07:06:02,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:06:02,459 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:02,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:02,459 INFO L225 Difference]: With dead ends: 609 [2021-06-05 07:06:02,459 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 07:06:02,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1097.5ms TimeCoverageRelationStatistics Valid=283, Invalid=2687, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:06:02,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 07:06:02,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 416. [2021-06-05 07:06:02,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.9903614457831325) internal successors, (826), 415 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:02,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 826 transitions. [2021-06-05 07:06:02,463 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 826 transitions. Word has length 30 [2021-06-05 07:06:02,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:02,463 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 826 transitions. [2021-06-05 07:06:02,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:02,463 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 826 transitions. [2021-06-05 07:06:02,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:02,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:02,464 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:02,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-05 07:06:02,664 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:02,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:02,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1791246057, now seen corresponding path program 248 times [2021-06-05 07:06:02,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:02,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897097579] [2021-06-05 07:06:02,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:02,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:02,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:02,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897097579] [2021-06-05 07:06:02,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897097579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:02,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964994946] [2021-06-05 07:06:02,899 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 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 [2021-06-05 07:06:02,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:06:02,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:02,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:02,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:03,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:06:03,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:03,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:03,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:03,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:06:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:03,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964994946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:03,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:03,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:03,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298638824] [2021-06-05 07:06:03,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:03,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:03,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:03,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:03,307 INFO L87 Difference]: Start difference. First operand 416 states and 826 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:04,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:04,165 INFO L93 Difference]: Finished difference Result 562 states and 1097 transitions. [2021-06-05 07:06:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:06:04,165 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:04,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:04,166 INFO L225 Difference]: With dead ends: 562 [2021-06-05 07:06:04,166 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 07:06:04,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 960.5ms TimeCoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:06:04,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 07:06:04,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 418. [2021-06-05 07:06:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.9880095923261392) internal successors, (829), 417 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:04,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 829 transitions. [2021-06-05 07:06:04,170 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 829 transitions. Word has length 30 [2021-06-05 07:06:04,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:04,170 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 829 transitions. [2021-06-05 07:06:04,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:04,170 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 829 transitions. [2021-06-05 07:06:04,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:04,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:04,170 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:04,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-06-05 07:06:04,371 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:04,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:04,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1621655515, now seen corresponding path program 249 times [2021-06-05 07:06:04,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:04,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770383243] [2021-06-05 07:06:04,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:04,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:04,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770383243] [2021-06-05 07:06:04,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770383243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:04,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792130953] [2021-06-05 07:06:04,607 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 [2021-06-05 07:06:04,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:06:04,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:04,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:04,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:04,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:06:04,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:04,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:04,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:04,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:06:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:05,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792130953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:05,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:05,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:05,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422458926] [2021-06-05 07:06:05,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:05,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:05,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:05,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:05,000 INFO L87 Difference]: Start difference. First operand 418 states and 829 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:05,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:05,975 INFO L93 Difference]: Finished difference Result 473 states and 930 transitions. [2021-06-05 07:06:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:06:05,976 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:05,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:05,976 INFO L225 Difference]: With dead ends: 473 [2021-06-05 07:06:05,976 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 07:06:05,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1079.9ms TimeCoverageRelationStatistics Valid=242, Invalid=2110, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:06:05,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 07:06:05,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 408. [2021-06-05 07:06:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.0) internal successors, (814), 407 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:05,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 814 transitions. [2021-06-05 07:06:05,980 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 814 transitions. Word has length 30 [2021-06-05 07:06:05,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:05,980 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 814 transitions. [2021-06-05 07:06:05,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:05,980 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 814 transitions. [2021-06-05 07:06:05,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:05,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:05,980 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:06,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:06,181 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:06,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:06,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1795304131, now seen corresponding path program 250 times [2021-06-05 07:06:06,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:06,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721818002] [2021-06-05 07:06:06,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:06,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:06,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721818002] [2021-06-05 07:06:06,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721818002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:06,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279931605] [2021-06-05 07:06:06,407 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 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 [2021-06-05 07:06:06,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:06:06,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:06,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:06,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:06,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:06:06,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:06,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:06,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:06,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:06:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:06,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279931605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:06,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:06,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:06,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855616084] [2021-06-05 07:06:06,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:06,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:06,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:06,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:06,785 INFO L87 Difference]: Start difference. First operand 408 states and 814 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:07,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:07,615 INFO L93 Difference]: Finished difference Result 556 states and 1093 transitions. [2021-06-05 07:06:07,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:06:07,615 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:07,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:07,616 INFO L225 Difference]: With dead ends: 556 [2021-06-05 07:06:07,616 INFO L226 Difference]: Without dead ends: 523 [2021-06-05 07:06:07,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 966.7ms TimeCoverageRelationStatistics Valid=218, Invalid=2038, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:06:07,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-05 07:06:07,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 404. [2021-06-05 07:06:07,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.002481389578164) internal successors, (807), 403 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:07,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 807 transitions. [2021-06-05 07:06:07,620 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 807 transitions. Word has length 30 [2021-06-05 07:06:07,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:07,620 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 807 transitions. [2021-06-05 07:06:07,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:07,620 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 807 transitions. [2021-06-05 07:06:07,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:07,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:07,620 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:07,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:07,821 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:07,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:07,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1626058665, now seen corresponding path program 251 times [2021-06-05 07:06:07,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:07,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584843915] [2021-06-05 07:06:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:08,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:08,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584843915] [2021-06-05 07:06:08,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584843915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:08,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41903026] [2021-06-05 07:06:08,045 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 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 [2021-06-05 07:06:08,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:06:08,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:08,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:06:08,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:08,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:06:08,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:08,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:08,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:08,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:06:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:08,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41903026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:08,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:08,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:08,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849968727] [2021-06-05 07:06:08,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:08,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:08,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:08,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:08,411 INFO L87 Difference]: Start difference. First operand 404 states and 807 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:09,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:09,577 INFO L93 Difference]: Finished difference Result 627 states and 1230 transitions. [2021-06-05 07:06:09,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:06:09,577 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:09,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:09,578 INFO L225 Difference]: With dead ends: 627 [2021-06-05 07:06:09,578 INFO L226 Difference]: Without dead ends: 618 [2021-06-05 07:06:09,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1010.7ms TimeCoverageRelationStatistics Valid=252, Invalid=2400, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:06:09,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-06-05 07:06:09,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 419. [2021-06-05 07:06:09,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.007177033492823) internal successors, (839), 418 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:09,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 839 transitions. [2021-06-05 07:06:09,582 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 839 transitions. Word has length 30 [2021-06-05 07:06:09,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:09,582 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 839 transitions. [2021-06-05 07:06:09,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:09,582 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 839 transitions. [2021-06-05 07:06:09,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:09,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:09,583 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:09,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:09,783 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:09,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:09,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1786842907, now seen corresponding path program 252 times [2021-06-05 07:06:09,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:09,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111579295] [2021-06-05 07:06:09,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:10,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:10,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111579295] [2021-06-05 07:06:10,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111579295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:10,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75474341] [2021-06-05 07:06:10,010 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 [2021-06-05 07:06:10,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:06:10,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:10,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:06:10,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:10,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:06:10,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:10,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:10,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:10,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:06:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:10,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75474341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:10,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:10,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:10,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766274599] [2021-06-05 07:06:10,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:10,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:10,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:10,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:10,388 INFO L87 Difference]: Start difference. First operand 419 states and 839 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:11,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:11,597 INFO L93 Difference]: Finished difference Result 534 states and 1054 transitions. [2021-06-05 07:06:11,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:06:11,598 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:11,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:11,598 INFO L225 Difference]: With dead ends: 534 [2021-06-05 07:06:11,598 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 07:06:11,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1172.7ms TimeCoverageRelationStatistics Valid=286, Invalid=2470, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:06:11,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 07:06:11,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 417. [2021-06-05 07:06:11,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0072115384615383) internal successors, (835), 416 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:11,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 835 transitions. [2021-06-05 07:06:11,602 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 835 transitions. Word has length 30 [2021-06-05 07:06:11,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:11,602 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 835 transitions. [2021-06-05 07:06:11,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:11,602 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 835 transitions. [2021-06-05 07:06:11,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:11,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:11,603 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:11,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:11,803 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:11,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:11,803 INFO L82 PathProgramCache]: Analyzing trace with hash -318176189, now seen corresponding path program 253 times [2021-06-05 07:06:11,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:11,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350338505] [2021-06-05 07:06:11,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:12,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:12,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350338505] [2021-06-05 07:06:12,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350338505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:12,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779108854] [2021-06-05 07:06:12,032 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 [2021-06-05 07:06:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:12,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:12,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:12,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:06:12,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:12,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:12,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:12,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:06:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:12,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779108854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:12,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:12,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:06:12,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358928409] [2021-06-05 07:06:12,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:06:12,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:12,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:06:12,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:06:12,360 INFO L87 Difference]: Start difference. First operand 417 states and 835 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:13,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:13,460 INFO L93 Difference]: Finished difference Result 655 states and 1281 transitions. [2021-06-05 07:06:13,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:06:13,460 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:06:13,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:13,461 INFO L225 Difference]: With dead ends: 655 [2021-06-05 07:06:13,461 INFO L226 Difference]: Without dead ends: 638 [2021-06-05 07:06:13,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1059.9ms TimeCoverageRelationStatistics Valid=268, Invalid=2488, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:06:13,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-05 07:06:13,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 426. [2021-06-05 07:06:13,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.0023529411764707) internal successors, (851), 425 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:13,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 851 transitions. [2021-06-05 07:06:13,465 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 851 transitions. Word has length 30 [2021-06-05 07:06:13,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:13,465 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 851 transitions. [2021-06-05 07:06:13,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:13,465 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 851 transitions. [2021-06-05 07:06:13,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:13,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:13,466 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:13,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 07:06:13,674 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:13,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:13,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1200862609, now seen corresponding path program 254 times [2021-06-05 07:06:13,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:13,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271272378] [2021-06-05 07:06:13,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:13,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:13,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:13,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271272378] [2021-06-05 07:06:13,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271272378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:13,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372835316] [2021-06-05 07:06:13,897 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 [2021-06-05 07:06:13,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:06:13,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:13,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:13,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:14,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:06:14,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:14,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:14,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:14,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:06:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:14,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372835316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:14,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:14,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:14,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020059988] [2021-06-05 07:06:14,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:14,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:14,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:14,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:14,245 INFO L87 Difference]: Start difference. First operand 426 states and 851 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:15,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:15,274 INFO L93 Difference]: Finished difference Result 654 states and 1278 transitions. [2021-06-05 07:06:15,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:06:15,274 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:15,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:15,274 INFO L225 Difference]: With dead ends: 654 [2021-06-05 07:06:15,275 INFO L226 Difference]: Without dead ends: 610 [2021-06-05 07:06:15,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 1059.9ms TimeCoverageRelationStatistics Valid=283, Invalid=2687, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:06:15,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-05 07:06:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 416. [2021-06-05 07:06:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.9927710843373494) internal successors, (827), 415 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:15,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 827 transitions. [2021-06-05 07:06:15,279 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 827 transitions. Word has length 30 [2021-06-05 07:06:15,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:15,279 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 827 transitions. [2021-06-05 07:06:15,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 827 transitions. [2021-06-05 07:06:15,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:15,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:15,279 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:15,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 07:06:15,480 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:15,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:15,480 INFO L82 PathProgramCache]: Analyzing trace with hash 570442201, now seen corresponding path program 255 times [2021-06-05 07:06:15,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:15,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342948479] [2021-06-05 07:06:15,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:15,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:15,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:15,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342948479] [2021-06-05 07:06:15,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342948479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:15,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281571377] [2021-06-05 07:06:15,708 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 [2021-06-05 07:06:15,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:06:15,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:15,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:15,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:15,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:06:15,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:15,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:15,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:15,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:06:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:16,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281571377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:16,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:16,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:16,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831215751] [2021-06-05 07:06:16,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:16,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:16,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:16,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:16,088 INFO L87 Difference]: Start difference. First operand 416 states and 827 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:17,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:17,031 INFO L93 Difference]: Finished difference Result 581 states and 1136 transitions. [2021-06-05 07:06:17,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:06:17,031 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:17,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:17,032 INFO L225 Difference]: With dead ends: 581 [2021-06-05 07:06:17,032 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 07:06:17,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 910.4ms TimeCoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:06:17,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 07:06:17,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 418. [2021-06-05 07:06:17,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.9904076738609113) internal successors, (830), 417 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:17,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 830 transitions. [2021-06-05 07:06:17,036 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 830 transitions. Word has length 30 [2021-06-05 07:06:17,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:17,036 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 830 transitions. [2021-06-05 07:06:17,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:17,036 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 830 transitions. [2021-06-05 07:06:17,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:17,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:17,036 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:17,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 07:06:17,237 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:17,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:17,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1452507925, now seen corresponding path program 256 times [2021-06-05 07:06:17,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:17,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206612749] [2021-06-05 07:06:17,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:17,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:17,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206612749] [2021-06-05 07:06:17,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206612749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:17,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485520187] [2021-06-05 07:06:17,476 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 [2021-06-05 07:06:17,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:06:17,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:17,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:17,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:17,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:06:17,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:17,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:17,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:17,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:06:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:17,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485520187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:17,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:17,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:17,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612081913] [2021-06-05 07:06:17,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:17,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:17,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:17,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:17,856 INFO L87 Difference]: Start difference. First operand 418 states and 830 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:18,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:18,853 INFO L93 Difference]: Finished difference Result 485 states and 955 transitions. [2021-06-05 07:06:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:06:18,853 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:18,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:18,853 INFO L225 Difference]: With dead ends: 485 [2021-06-05 07:06:18,853 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 07:06:18,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1052.8ms TimeCoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:06:18,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 07:06:18,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 408. [2021-06-05 07:06:18,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.0024570024570023) internal successors, (815), 407 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:18,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 815 transitions. [2021-06-05 07:06:18,857 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 815 transitions. Word has length 30 [2021-06-05 07:06:18,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:18,857 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 815 transitions. [2021-06-05 07:06:18,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:18,857 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 815 transitions. [2021-06-05 07:06:18,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:18,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:18,857 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:19,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 07:06:19,058 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:19,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:19,058 INFO L82 PathProgramCache]: Analyzing trace with hash 574500275, now seen corresponding path program 257 times [2021-06-05 07:06:19,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:19,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626269725] [2021-06-05 07:06:19,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:19,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:19,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626269725] [2021-06-05 07:06:19,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626269725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:19,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769287283] [2021-06-05 07:06:19,277 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 [2021-06-05 07:06:19,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:06:19,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:19,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:06:19,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:19,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:06:19,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:19,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:19,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:19,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:06:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:19,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769287283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:19,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:19,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:19,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192402114] [2021-06-05 07:06:19,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:19,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:19,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:19,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:19,647 INFO L87 Difference]: Start difference. First operand 408 states and 815 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:20,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:20,423 INFO L93 Difference]: Finished difference Result 578 states and 1137 transitions. [2021-06-05 07:06:20,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:06:20,423 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:20,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:20,424 INFO L225 Difference]: With dead ends: 578 [2021-06-05 07:06:20,424 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 07:06:20,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 931.9ms TimeCoverageRelationStatistics Valid=220, Invalid=2036, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:06:20,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 07:06:20,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 405. [2021-06-05 07:06:20,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.004950495049505) internal successors, (810), 404 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:20,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 810 transitions. [2021-06-05 07:06:20,428 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 810 transitions. Word has length 30 [2021-06-05 07:06:20,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:20,428 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 810 transitions. [2021-06-05 07:06:20,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:20,428 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 810 transitions. [2021-06-05 07:06:20,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:20,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:20,428 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:20,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-06-05 07:06:20,629 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:20,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:20,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1060637779, now seen corresponding path program 258 times [2021-06-05 07:06:20,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:20,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560381588] [2021-06-05 07:06:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:20,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:20,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560381588] [2021-06-05 07:06:20,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560381588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:20,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945101599] [2021-06-05 07:06:20,861 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 [2021-06-05 07:06:20,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:06:20,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:20,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:20,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:21,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:06:21,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:21,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:21,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:21,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:06:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:21,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945101599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:21,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:21,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:21,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146585912] [2021-06-05 07:06:21,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:21,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:21,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:21,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:21,239 INFO L87 Difference]: Start difference. First operand 405 states and 810 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:21,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:21,988 INFO L93 Difference]: Finished difference Result 576 states and 1125 transitions. [2021-06-05 07:06:21,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:06:21,988 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:21,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:21,989 INFO L225 Difference]: With dead ends: 576 [2021-06-05 07:06:21,989 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 07:06:21,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 917.7ms TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:06:21,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 07:06:21,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 419. [2021-06-05 07:06:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.0) internal successors, (836), 418 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:21,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 836 transitions. [2021-06-05 07:06:21,993 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 836 transitions. Word has length 30 [2021-06-05 07:06:21,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:21,993 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 836 transitions. [2021-06-05 07:06:21,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 836 transitions. [2021-06-05 07:06:21,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:21,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:21,994 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:22,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-05 07:06:22,194 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:22,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:22,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1942703503, now seen corresponding path program 259 times [2021-06-05 07:06:22,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:22,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116231871] [2021-06-05 07:06:22,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:22,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:22,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116231871] [2021-06-05 07:06:22,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116231871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:22,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786708496] [2021-06-05 07:06:22,426 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 [2021-06-05 07:06:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:22,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:22,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:22,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:06:22,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:22,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:22,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:22,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:06:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:22,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786708496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:22,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:22,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:22,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348084449] [2021-06-05 07:06:22,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:22,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:22,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:22,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:22,810 INFO L87 Difference]: Start difference. First operand 419 states and 836 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:23,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:23,866 INFO L93 Difference]: Finished difference Result 490 states and 965 transitions. [2021-06-05 07:06:23,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:06:23,866 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:23,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:23,867 INFO L225 Difference]: With dead ends: 490 [2021-06-05 07:06:23,867 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 07:06:23,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1064.6ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:06:23,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 07:06:23,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 417. [2021-06-05 07:06:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0) internal successors, (832), 416 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 832 transitions. [2021-06-05 07:06:23,870 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 832 transitions. Word has length 30 [2021-06-05 07:06:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:23,871 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 832 transitions. [2021-06-05 07:06:23,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:23,871 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 832 transitions. [2021-06-05 07:06:23,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:23,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:23,871 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:24,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:24,071 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:24,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:24,072 INFO L82 PathProgramCache]: Analyzing trace with hash -883597075, now seen corresponding path program 260 times [2021-06-05 07:06:24,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:24,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123908348] [2021-06-05 07:06:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:24,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:24,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123908348] [2021-06-05 07:06:24,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123908348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:24,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022654355] [2021-06-05 07:06:24,319 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 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 [2021-06-05 07:06:24,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:06:24,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:24,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:24,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:24,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:06:24,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:24,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:24,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:24,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:06:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:24,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022654355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:24,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:24,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:06:24,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578852929] [2021-06-05 07:06:24,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:06:24,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:24,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:06:24,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:06:24,650 INFO L87 Difference]: Start difference. First operand 417 states and 832 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:25,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:25,464 INFO L93 Difference]: Finished difference Result 575 states and 1127 transitions. [2021-06-05 07:06:25,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:06:25,464 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:06:25,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:25,464 INFO L225 Difference]: With dead ends: 575 [2021-06-05 07:06:25,465 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 07:06:25,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 863.4ms TimeCoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:06:25,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 07:06:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 409. [2021-06-05 07:06:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0) internal successors, (816), 408 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:25,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 816 transitions. [2021-06-05 07:06:25,468 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 816 transitions. Word has length 30 [2021-06-05 07:06:25,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:25,468 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 816 transitions. [2021-06-05 07:06:25,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:25,469 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 816 transitions. [2021-06-05 07:06:25,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:25,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:25,469 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:25,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:25,669 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:25,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:25,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1064695853, now seen corresponding path program 261 times [2021-06-05 07:06:25,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:25,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275198136] [2021-06-05 07:06:25,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:25,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:25,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275198136] [2021-06-05 07:06:25,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275198136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:25,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073518726] [2021-06-05 07:06:25,894 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 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 [2021-06-05 07:06:25,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:06:25,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:25,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:25,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:26,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:06:26,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:26,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:26,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:26,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:06:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:26,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073518726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:26,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:26,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:26,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877922241] [2021-06-05 07:06:26,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:26,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:26,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:26,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:26,269 INFO L87 Difference]: Start difference. First operand 409 states and 816 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:27,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:27,100 INFO L93 Difference]: Finished difference Result 558 states and 1096 transitions. [2021-06-05 07:06:27,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:06:27,100 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:27,101 INFO L225 Difference]: With dead ends: 558 [2021-06-05 07:06:27,101 INFO L226 Difference]: Without dead ends: 525 [2021-06-05 07:06:27,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 884.7ms TimeCoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:06:27,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-05 07:06:27,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 407. [2021-06-05 07:06:27,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0) internal successors, (812), 406 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 812 transitions. [2021-06-05 07:06:27,105 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 812 transitions. Word has length 30 [2021-06-05 07:06:27,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:27,105 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 812 transitions. [2021-06-05 07:06:27,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:27,105 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 812 transitions. [2021-06-05 07:06:27,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:27,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:27,105 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:27,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:27,306 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:27,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:27,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1274812887, now seen corresponding path program 262 times [2021-06-05 07:06:27,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:27,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444291137] [2021-06-05 07:06:27,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:27,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:27,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444291137] [2021-06-05 07:06:27,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444291137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:27,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519054906] [2021-06-05 07:06:27,545 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 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 [2021-06-05 07:06:27,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:06:27,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:27,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:27,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:27,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:06:27,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:27,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:27,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:27,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:06:27,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:27,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519054906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:27,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:27,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 07:06:27,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274044772] [2021-06-05 07:06:27,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:06:27,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:27,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:06:27,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:06:27,959 INFO L87 Difference]: Start difference. First operand 407 states and 812 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:28,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:28,869 INFO L93 Difference]: Finished difference Result 556 states and 1092 transitions. [2021-06-05 07:06:28,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:06:28,869 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:06:28,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:28,870 INFO L225 Difference]: With dead ends: 556 [2021-06-05 07:06:28,870 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 07:06:28,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 970.9ms TimeCoverageRelationStatistics Valid=219, Invalid=2231, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:06:28,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 07:06:28,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 403. [2021-06-05 07:06:28,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0024875621890548) internal successors, (805), 402 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:28,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 805 transitions. [2021-06-05 07:06:28,874 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 805 transitions. Word has length 30 [2021-06-05 07:06:28,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:28,874 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 805 transitions. [2021-06-05 07:06:28,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:28,874 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 805 transitions. [2021-06-05 07:06:28,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:28,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:28,874 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:29,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:29,075 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:29,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:29,075 INFO L82 PathProgramCache]: Analyzing trace with hash -987827211, now seen corresponding path program 263 times [2021-06-05 07:06:29,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:29,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687143602] [2021-06-05 07:06:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:29,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:29,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687143602] [2021-06-05 07:06:29,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687143602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:29,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521468743] [2021-06-05 07:06:29,298 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 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 [2021-06-05 07:06:29,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:06:29,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:29,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:06:29,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:29,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:06:29,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:29,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:29,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:29,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:06:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:29,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521468743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:29,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:29,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:29,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154674281] [2021-06-05 07:06:29,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:29,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:29,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:29,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:29,666 INFO L87 Difference]: Start difference. First operand 403 states and 805 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:30,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:30,767 INFO L93 Difference]: Finished difference Result 688 states and 1352 transitions. [2021-06-05 07:06:30,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:06:30,767 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:30,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:30,768 INFO L225 Difference]: With dead ends: 688 [2021-06-05 07:06:30,768 INFO L226 Difference]: Without dead ends: 679 [2021-06-05 07:06:30,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1043.1ms TimeCoverageRelationStatistics Valid=256, Invalid=2500, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:06:30,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-06-05 07:06:30,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 421. [2021-06-05 07:06:30,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.0142857142857142) internal successors, (846), 420 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:30,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 846 transitions. [2021-06-05 07:06:30,772 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 846 transitions. Word has length 30 [2021-06-05 07:06:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:30,772 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 846 transitions. [2021-06-05 07:06:30,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 846 transitions. [2021-06-05 07:06:30,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:30,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:30,773 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:30,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:30,973 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:30,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:30,974 INFO L82 PathProgramCache]: Analyzing trace with hash -105761487, now seen corresponding path program 264 times [2021-06-05 07:06:30,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:30,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96310056] [2021-06-05 07:06:30,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:31,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:31,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96310056] [2021-06-05 07:06:31,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96310056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:31,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293626701] [2021-06-05 07:06:31,202 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 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 [2021-06-05 07:06:31,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:06:31,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:31,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:06:31,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:31,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:06:31,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:31,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:31,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:31,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:06:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:31,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293626701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:31,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:31,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:31,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740288902] [2021-06-05 07:06:31,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:31,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:31,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:31,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:31,577 INFO L87 Difference]: Start difference. First operand 421 states and 846 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:32,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:32,931 INFO L93 Difference]: Finished difference Result 582 states and 1148 transitions. [2021-06-05 07:06:32,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:06:32,932 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:32,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:32,932 INFO L225 Difference]: With dead ends: 582 [2021-06-05 07:06:32,932 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 07:06:32,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1211.5ms TimeCoverageRelationStatistics Valid=292, Invalid=2570, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:06:32,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 07:06:32,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 419. [2021-06-05 07:06:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.014354066985646) internal successors, (842), 418 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:32,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 842 transitions. [2021-06-05 07:06:32,936 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 842 transitions. Word has length 30 [2021-06-05 07:06:32,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:32,936 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 842 transitions. [2021-06-05 07:06:32,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:32,936 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 842 transitions. [2021-06-05 07:06:32,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:32,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:32,936 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:33,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 07:06:33,137 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:33,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:33,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1362905231, now seen corresponding path program 265 times [2021-06-05 07:06:33,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:33,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986611032] [2021-06-05 07:06:33,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:33,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:33,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986611032] [2021-06-05 07:06:33,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986611032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:33,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662503063] [2021-06-05 07:06:33,359 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 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 [2021-06-05 07:06:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:33,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:33,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:33,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:06:33,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:33,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:33,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:33,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:06:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:33,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662503063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:33,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:33,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:06:33,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963005679] [2021-06-05 07:06:33,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:06:33,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:33,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:06:33,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:06:33,695 INFO L87 Difference]: Start difference. First operand 419 states and 842 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:34,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:34,944 INFO L93 Difference]: Finished difference Result 725 states and 1417 transitions. [2021-06-05 07:06:34,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:06:34,945 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:06:34,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:34,945 INFO L225 Difference]: With dead ends: 725 [2021-06-05 07:06:34,945 INFO L226 Difference]: Without dead ends: 708 [2021-06-05 07:06:34,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1091.5ms TimeCoverageRelationStatistics Valid=272, Invalid=2590, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:06:34,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-06-05 07:06:34,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 428. [2021-06-05 07:06:34,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.009367681498829) internal successors, (858), 427 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:34,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 858 transitions. [2021-06-05 07:06:34,950 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 858 transitions. Word has length 30 [2021-06-05 07:06:34,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:34,950 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 858 transitions. [2021-06-05 07:06:34,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:34,950 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 858 transitions. [2021-06-05 07:06:34,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:34,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:34,950 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:35,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 07:06:35,151 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:35,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:35,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1413023267, now seen corresponding path program 266 times [2021-06-05 07:06:35,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:35,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492516797] [2021-06-05 07:06:35,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:35,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:35,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492516797] [2021-06-05 07:06:35,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492516797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:35,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345206021] [2021-06-05 07:06:35,378 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 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 [2021-06-05 07:06:35,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:06:35,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:35,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:35,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:35,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:06:35,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:35,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:35,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:35,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:06:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:35,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345206021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:35,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:35,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:35,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236173641] [2021-06-05 07:06:35,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:35,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:35,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:35,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:35,736 INFO L87 Difference]: Start difference. First operand 428 states and 858 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:37,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:37,030 INFO L93 Difference]: Finished difference Result 724 states and 1414 transitions. [2021-06-05 07:06:37,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:06:37,030 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:37,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:37,031 INFO L225 Difference]: With dead ends: 724 [2021-06-05 07:06:37,031 INFO L226 Difference]: Without dead ends: 680 [2021-06-05 07:06:37,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1099.2ms TimeCoverageRelationStatistics Valid=287, Invalid=2793, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:06:37,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-05 07:06:37,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 418. [2021-06-05 07:06:37,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.0) internal successors, (834), 417 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:37,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 834 transitions. [2021-06-05 07:06:37,035 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 834 transitions. Word has length 30 [2021-06-05 07:06:37,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:37,035 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 834 transitions. [2021-06-05 07:06:37,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:37,035 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 834 transitions. [2021-06-05 07:06:37,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:37,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:37,036 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:37,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 07:06:37,236 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:37,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:37,236 INFO L82 PathProgramCache]: Analyzing trace with hash -2043443675, now seen corresponding path program 267 times [2021-06-05 07:06:37,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:37,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209558138] [2021-06-05 07:06:37,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:37,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:37,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209558138] [2021-06-05 07:06:37,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209558138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:37,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179639822] [2021-06-05 07:06:37,464 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 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 [2021-06-05 07:06:37,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:06:37,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:37,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:37,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:37,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:06:37,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:37,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:37,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:37,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:06:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:37,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179639822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:37,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:37,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:37,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762872780] [2021-06-05 07:06:37,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:37,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:37,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:37,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:37,861 INFO L87 Difference]: Start difference. First operand 418 states and 834 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:38,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:38,940 INFO L93 Difference]: Finished difference Result 611 states and 1199 transitions. [2021-06-05 07:06:38,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:06:38,940 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:38,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:38,941 INFO L225 Difference]: With dead ends: 611 [2021-06-05 07:06:38,941 INFO L226 Difference]: Without dead ends: 602 [2021-06-05 07:06:38,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 947.5ms TimeCoverageRelationStatistics Valid=221, Invalid=2131, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:06:38,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-05 07:06:38,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 420. [2021-06-05 07:06:38,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.9976133651551313) internal successors, (837), 419 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:38,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 837 transitions. [2021-06-05 07:06:38,945 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 837 transitions. Word has length 30 [2021-06-05 07:06:38,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:38,945 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 837 transitions. [2021-06-05 07:06:38,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:38,945 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 837 transitions. [2021-06-05 07:06:38,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:38,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:38,945 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:39,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 07:06:39,146 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:39,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:39,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1161377951, now seen corresponding path program 268 times [2021-06-05 07:06:39,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:39,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030176014] [2021-06-05 07:06:39,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:39,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:39,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030176014] [2021-06-05 07:06:39,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030176014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:39,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91566792] [2021-06-05 07:06:39,381 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 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 [2021-06-05 07:06:39,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:06:39,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:39,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:39,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:39,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:06:39,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:39,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:39,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:39,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:06:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:39,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91566792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:39,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:39,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:39,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649489292] [2021-06-05 07:06:39,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:39,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:39,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:39,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:39,762 INFO L87 Difference]: Start difference. First operand 420 states and 837 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:40,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:40,875 INFO L93 Difference]: Finished difference Result 506 states and 1000 transitions. [2021-06-05 07:06:40,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:06:40,875 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:40,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:40,876 INFO L225 Difference]: With dead ends: 506 [2021-06-05 07:06:40,876 INFO L226 Difference]: Without dead ends: 483 [2021-06-05 07:06:40,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1084.5ms TimeCoverageRelationStatistics Valid=250, Invalid=2200, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:06:40,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-05 07:06:40,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 410. [2021-06-05 07:06:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.0097799511002443) internal successors, (822), 409 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 822 transitions. [2021-06-05 07:06:40,879 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 822 transitions. Word has length 30 [2021-06-05 07:06:40,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:40,879 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 822 transitions. [2021-06-05 07:06:40,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:40,879 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 822 transitions. [2021-06-05 07:06:40,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:40,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:40,880 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:41,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:41,080 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:41,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:41,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2039385601, now seen corresponding path program 269 times [2021-06-05 07:06:41,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:41,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841146682] [2021-06-05 07:06:41,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:41,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:41,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841146682] [2021-06-05 07:06:41,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841146682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:41,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887807787] [2021-06-05 07:06:41,301 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 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 [2021-06-05 07:06:41,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:06:41,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:41,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:06:41,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:41,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:06:41,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:41,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:41,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:41,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:06:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:41,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887807787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:41,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:41,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:41,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024843426] [2021-06-05 07:06:41,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:41,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:41,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:41,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:41,678 INFO L87 Difference]: Start difference. First operand 410 states and 822 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:42,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:42,652 INFO L93 Difference]: Finished difference Result 608 states and 1200 transitions. [2021-06-05 07:06:42,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:06:42,652 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:42,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:42,653 INFO L225 Difference]: With dead ends: 608 [2021-06-05 07:06:42,653 INFO L226 Difference]: Without dead ends: 575 [2021-06-05 07:06:42,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 966.6ms TimeCoverageRelationStatistics Valid=224, Invalid=2128, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:06:42,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-06-05 07:06:42,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 407. [2021-06-05 07:06:42,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0123152709359604) internal successors, (817), 406 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:42,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 817 transitions. [2021-06-05 07:06:42,656 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 817 transitions. Word has length 30 [2021-06-05 07:06:42,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:42,657 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 817 transitions. [2021-06-05 07:06:42,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:42,657 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 817 transitions. [2021-06-05 07:06:42,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:42,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:42,657 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:42,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:42,857 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:42,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:42,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1553248097, now seen corresponding path program 270 times [2021-06-05 07:06:42,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:42,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374983181] [2021-06-05 07:06:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:43,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:43,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374983181] [2021-06-05 07:06:43,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374983181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:43,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682552418] [2021-06-05 07:06:43,083 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 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 [2021-06-05 07:06:43,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:06:43,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:43,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:43,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:43,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:06:43,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:43,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:43,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:43,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:06:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:43,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682552418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:43,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:43,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:43,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435589406] [2021-06-05 07:06:43,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:43,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:43,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:43,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:43,462 INFO L87 Difference]: Start difference. First operand 407 states and 817 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:44,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:44,372 INFO L93 Difference]: Finished difference Result 599 states and 1174 transitions. [2021-06-05 07:06:44,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:06:44,372 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:44,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:44,373 INFO L225 Difference]: With dead ends: 599 [2021-06-05 07:06:44,373 INFO L226 Difference]: Without dead ends: 590 [2021-06-05 07:06:44,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 915.0ms TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:06:44,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-06-05 07:06:44,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 421. [2021-06-05 07:06:44,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.007142857142857) internal successors, (843), 420 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:44,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 843 transitions. [2021-06-05 07:06:44,377 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 843 transitions. Word has length 30 [2021-06-05 07:06:44,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:44,377 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 843 transitions. [2021-06-05 07:06:44,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:44,377 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 843 transitions. [2021-06-05 07:06:44,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:44,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:44,377 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:44,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-05 07:06:44,578 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:44,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:44,578 INFO L82 PathProgramCache]: Analyzing trace with hash -671182373, now seen corresponding path program 271 times [2021-06-05 07:06:44,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:44,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226082318] [2021-06-05 07:06:44,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:44,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:44,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226082318] [2021-06-05 07:06:44,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226082318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:44,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472011199] [2021-06-05 07:06:44,812 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 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 [2021-06-05 07:06:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:44,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:44,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:45,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:06:45,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:45,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:45,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:45,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:06:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:45,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472011199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:45,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:45,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:45,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264059092] [2021-06-05 07:06:45,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:45,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:45,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:45,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:45,225 INFO L87 Difference]: Start difference. First operand 421 states and 843 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:46,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:46,298 INFO L93 Difference]: Finished difference Result 513 states and 1014 transitions. [2021-06-05 07:06:46,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:06:46,298 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:46,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:46,298 INFO L225 Difference]: With dead ends: 513 [2021-06-05 07:06:46,298 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 07:06:46,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1069.8ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:06:46,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 07:06:46,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 419. [2021-06-05 07:06:46,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.007177033492823) internal successors, (839), 418 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:46,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 839 transitions. [2021-06-05 07:06:46,302 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 839 transitions. Word has length 30 [2021-06-05 07:06:46,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:46,302 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 839 transitions. [2021-06-05 07:06:46,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:46,302 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 839 transitions. [2021-06-05 07:06:46,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:46,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:46,303 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:46,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:46,503 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:46,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:46,503 INFO L82 PathProgramCache]: Analyzing trace with hash 797484345, now seen corresponding path program 272 times [2021-06-05 07:06:46,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:46,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158393027] [2021-06-05 07:06:46,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:46,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:46,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158393027] [2021-06-05 07:06:46,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158393027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:46,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765932972] [2021-06-05 07:06:46,726 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 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 [2021-06-05 07:06:46,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:06:46,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:46,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:46,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:46,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:06:46,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:46,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:46,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:46,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:06:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:47,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765932972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:47,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:47,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:06:47,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722350583] [2021-06-05 07:06:47,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:06:47,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:47,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:06:47,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:06:47,056 INFO L87 Difference]: Start difference. First operand 419 states and 839 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:47,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:47,921 INFO L93 Difference]: Finished difference Result 598 states and 1176 transitions. [2021-06-05 07:06:47,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:06:47,921 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:06:47,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:47,922 INFO L225 Difference]: With dead ends: 598 [2021-06-05 07:06:47,922 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 07:06:47,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 849.0ms TimeCoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:06:47,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 07:06:47,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 411. [2021-06-05 07:06:47,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0073170731707317) internal successors, (823), 410 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 823 transitions. [2021-06-05 07:06:47,926 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 823 transitions. Word has length 30 [2021-06-05 07:06:47,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:47,926 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 823 transitions. [2021-06-05 07:06:47,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:47,926 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 823 transitions. [2021-06-05 07:06:47,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:47,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:47,926 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:48,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:48,127 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:48,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:48,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1549190023, now seen corresponding path program 273 times [2021-06-05 07:06:48,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:48,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459712936] [2021-06-05 07:06:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:48,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:48,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459712936] [2021-06-05 07:06:48,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459712936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:48,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379976911] [2021-06-05 07:06:48,344 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 [2021-06-05 07:06:48,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:06:48,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:48,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:48,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:48,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:06:48,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:48,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:48,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:48,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:06:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:48,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379976911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:48,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:48,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:48,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326826526] [2021-06-05 07:06:48,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:48,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:48,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:48,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:48,722 INFO L87 Difference]: Start difference. First operand 411 states and 823 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:49,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:49,505 INFO L93 Difference]: Finished difference Result 581 states and 1145 transitions. [2021-06-05 07:06:49,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:06:49,506 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:49,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:49,506 INFO L225 Difference]: With dead ends: 581 [2021-06-05 07:06:49,506 INFO L226 Difference]: Without dead ends: 548 [2021-06-05 07:06:49,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 872.7ms TimeCoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:06:49,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-06-05 07:06:49,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 409. [2021-06-05 07:06:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0073529411764706) internal successors, (819), 408 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 819 transitions. [2021-06-05 07:06:49,510 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 819 transitions. Word has length 30 [2021-06-05 07:06:49,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:49,510 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 819 transitions. [2021-06-05 07:06:49,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:49,510 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 819 transitions. [2021-06-05 07:06:49,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:49,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:49,511 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:49,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:49,711 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:49,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:49,711 INFO L82 PathProgramCache]: Analyzing trace with hash 406268533, now seen corresponding path program 274 times [2021-06-05 07:06:49,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:49,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362629675] [2021-06-05 07:06:49,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:49,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:49,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362629675] [2021-06-05 07:06:49,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362629675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:49,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105204153] [2021-06-05 07:06:49,950 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 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 [2021-06-05 07:06:49,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:06:49,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:49,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:49,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:50,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:06:50,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:50,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:50,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:50,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:06:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:50,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105204153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:50,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:50,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 07:06:50,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581799769] [2021-06-05 07:06:50,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:06:50,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:50,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:06:50,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:06:50,368 INFO L87 Difference]: Start difference. First operand 409 states and 819 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:51,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:51,334 INFO L93 Difference]: Finished difference Result 582 states and 1146 transitions. [2021-06-05 07:06:51,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:06:51,334 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:06:51,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:51,335 INFO L225 Difference]: With dead ends: 582 [2021-06-05 07:06:51,335 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 07:06:51,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 968.1ms TimeCoverageRelationStatistics Valid=219, Invalid=2231, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:06:51,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 07:06:51,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 406. [2021-06-05 07:06:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0098765432098764) internal successors, (814), 405 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:51,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 814 transitions. [2021-06-05 07:06:51,338 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 814 transitions. Word has length 30 [2021-06-05 07:06:51,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:51,339 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 814 transitions. [2021-06-05 07:06:51,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:51,339 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 814 transitions. [2021-06-05 07:06:51,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:51,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:51,339 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:51,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2021-06-05 07:06:51,539 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:51,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:51,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1063113897, now seen corresponding path program 275 times [2021-06-05 07:06:51,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:51,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327594991] [2021-06-05 07:06:51,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:51,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:51,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327594991] [2021-06-05 07:06:51,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327594991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:51,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572024431] [2021-06-05 07:06:51,770 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 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 [2021-06-05 07:06:51,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:06:51,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:51,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:06:51,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:51,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:06:51,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:51,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:51,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:51,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:06:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:52,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572024431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:52,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:52,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:52,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528883758] [2021-06-05 07:06:52,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:52,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:52,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:52,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:52,147 INFO L87 Difference]: Start difference. First operand 406 states and 814 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:53,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:53,256 INFO L93 Difference]: Finished difference Result 617 states and 1203 transitions. [2021-06-05 07:06:53,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:06:53,257 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:53,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:53,257 INFO L225 Difference]: With dead ends: 617 [2021-06-05 07:06:53,257 INFO L226 Difference]: Without dead ends: 608 [2021-06-05 07:06:53,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 952.7ms TimeCoverageRelationStatistics Valid=232, Invalid=2318, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:06:53,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-05 07:06:53,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 435. [2021-06-05 07:06:53,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.0046082949308754) internal successors, (870), 434 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:53,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 870 transitions. [2021-06-05 07:06:53,261 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 870 transitions. Word has length 30 [2021-06-05 07:06:53,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:53,262 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 870 transitions. [2021-06-05 07:06:53,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 870 transitions. [2021-06-05 07:06:53,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:53,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:53,262 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:53,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-05 07:06:53,462 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:53,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:53,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1945179621, now seen corresponding path program 276 times [2021-06-05 07:06:53,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:53,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543998181] [2021-06-05 07:06:53,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:53,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:53,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543998181] [2021-06-05 07:06:53,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543998181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:53,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309600329] [2021-06-05 07:06:53,691 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 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 [2021-06-05 07:06:53,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:06:53,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:53,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:06:53,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:53,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:06:53,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:53,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:53,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:53,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:06:54,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:54,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309600329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:54,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:54,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:54,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343737678] [2021-06-05 07:06:54,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:54,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:54,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:54,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:54,071 INFO L87 Difference]: Start difference. First operand 435 states and 870 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:55,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:55,307 INFO L93 Difference]: Finished difference Result 508 states and 994 transitions. [2021-06-05 07:06:55,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:06:55,308 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:55,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:55,308 INFO L225 Difference]: With dead ends: 508 [2021-06-05 07:06:55,308 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 07:06:55,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1245.8ms TimeCoverageRelationStatistics Valid=288, Invalid=2682, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:06:55,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 07:06:55,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 431. [2021-06-05 07:06:55,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.0046511627906978) internal successors, (862), 430 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:55,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 862 transitions. [2021-06-05 07:06:55,312 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 862 transitions. Word has length 30 [2021-06-05 07:06:55,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:55,312 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 862 transitions. [2021-06-05 07:06:55,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:55,312 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 862 transitions. [2021-06-05 07:06:55,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:55,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:55,313 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:55,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-05 07:06:55,513 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:55,513 INFO L82 PathProgramCache]: Analyzing trace with hash -881120957, now seen corresponding path program 277 times [2021-06-05 07:06:55,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:55,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522760620] [2021-06-05 07:06:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:55,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:55,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522760620] [2021-06-05 07:06:55,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522760620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:55,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512196876] [2021-06-05 07:06:55,743 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 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 [2021-06-05 07:06:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:55,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:55,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:55,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:06:55,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:55,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:55,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:55,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:06:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:56,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512196876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:56,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:56,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:06:56,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634139778] [2021-06-05 07:06:56,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:06:56,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:56,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:06:56,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:06:56,068 INFO L87 Difference]: Start difference. First operand 431 states and 862 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:56,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:56,903 INFO L93 Difference]: Finished difference Result 624 states and 1216 transitions. [2021-06-05 07:06:56,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:06:56,904 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:06:56,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:56,904 INFO L225 Difference]: With dead ends: 624 [2021-06-05 07:06:56,904 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 07:06:56,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 858.7ms TimeCoverageRelationStatistics Valid=218, Invalid=1944, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:06:56,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 07:06:56,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 418. [2021-06-05 07:06:56,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.0047961630695443) internal successors, (836), 417 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:56,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 836 transitions. [2021-06-05 07:06:56,908 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 836 transitions. Word has length 30 [2021-06-05 07:06:56,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:56,908 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 836 transitions. [2021-06-05 07:06:56,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:56,908 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 836 transitions. [2021-06-05 07:06:56,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:56,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:56,909 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:57,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-05 07:06:57,109 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:57,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:57,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1067171971, now seen corresponding path program 278 times [2021-06-05 07:06:57,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:57,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6848166] [2021-06-05 07:06:57,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:57,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:57,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:57,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6848166] [2021-06-05 07:06:57,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6848166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:57,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276827127] [2021-06-05 07:06:57,329 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 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 [2021-06-05 07:06:57,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:06:57,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:57,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:57,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:57,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:06:57,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:57,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:57,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:57,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:06:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:57,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276827127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:57,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:57,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:06:57,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691897851] [2021-06-05 07:06:57,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:57,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:57,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:57,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:57,713 INFO L87 Difference]: Start difference. First operand 418 states and 836 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:58,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:58,596 INFO L93 Difference]: Finished difference Result 625 states and 1215 transitions. [2021-06-05 07:06:58,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:06:58,596 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:06:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:58,597 INFO L225 Difference]: With dead ends: 625 [2021-06-05 07:06:58,597 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 07:06:58,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 895.4ms TimeCoverageRelationStatistics Valid=216, Invalid=2040, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:06:58,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 07:06:58,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 415. [2021-06-05 07:06:58,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.004830917874396) internal successors, (830), 414 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:58,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 830 transitions. [2021-06-05 07:06:58,601 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 830 transitions. Word has length 30 [2021-06-05 07:06:58,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:58,601 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 830 transitions. [2021-06-05 07:06:58,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:58,601 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 830 transitions. [2021-06-05 07:06:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:06:58,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:58,601 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:58,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:58,805 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:58,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:58,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1272336769, now seen corresponding path program 279 times [2021-06-05 07:06:58,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:58,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498127505] [2021-06-05 07:06:58,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:59,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:59,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498127505] [2021-06-05 07:06:59,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498127505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:59,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086737665] [2021-06-05 07:06:59,042 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 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 [2021-06-05 07:06:59,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:06:59,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:59,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:06:59,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:59,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:06:59,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:59,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:59,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:59,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:06:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:59,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086737665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:59,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:59,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 36 [2021-06-05 07:06:59,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130255166] [2021-06-05 07:06:59,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:06:59,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:59,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:06:59,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:06:59,503 INFO L87 Difference]: Start difference. First operand 415 states and 830 transitions. Second operand has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:00,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:00,522 INFO L93 Difference]: Finished difference Result 644 states and 1246 transitions. [2021-06-05 07:07:00,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:07:00,522 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 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 30 [2021-06-05 07:07:00,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:00,522 INFO L225 Difference]: With dead ends: 644 [2021-06-05 07:07:00,522 INFO L226 Difference]: Without dead ends: 608 [2021-06-05 07:07:00,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 1061.9ms TimeCoverageRelationStatistics Valid=255, Invalid=2715, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:07:00,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-05 07:07:00,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 412. [2021-06-05 07:07:00,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.0072992700729926) internal successors, (825), 411 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:00,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 825 transitions. [2021-06-05 07:07:00,526 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 825 transitions. Word has length 30 [2021-06-05 07:07:00,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:00,527 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 825 transitions. [2021-06-05 07:07:00,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:00,527 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 825 transitions. [2021-06-05 07:07:00,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:00,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:00,527 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:00,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-06-05 07:07:00,727 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:00,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:00,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1755740029, now seen corresponding path program 280 times [2021-06-05 07:07:00,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:00,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365014998] [2021-06-05 07:07:00,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:00,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:00,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365014998] [2021-06-05 07:07:00,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365014998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:00,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746945069] [2021-06-05 07:07:00,981 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 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 [2021-06-05 07:07:01,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:07:01,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:01,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:01,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:01,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:01,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:01,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:01,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:01,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:20 [2021-06-05 07:07:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:01,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746945069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:01,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:01,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 07:07:01,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995515320] [2021-06-05 07:07:01,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:07:01,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:01,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:07:01,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:07:01,405 INFO L87 Difference]: Start difference. First operand 412 states and 825 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:02,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:02,374 INFO L93 Difference]: Finished difference Result 572 states and 1124 transitions. [2021-06-05 07:07:02,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:07:02,374 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:07:02,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:02,374 INFO L225 Difference]: With dead ends: 572 [2021-06-05 07:07:02,374 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 07:07:02,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1003.0ms TimeCoverageRelationStatistics Valid=226, Invalid=2324, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:07:02,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 07:07:02,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 394. [2021-06-05 07:07:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.005089058524173) internal successors, (788), 393 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:02,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 788 transitions. [2021-06-05 07:07:02,378 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 788 transitions. Word has length 30 [2021-06-05 07:07:02,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:02,378 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 788 transitions. [2021-06-05 07:07:02,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:02,378 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 788 transitions. [2021-06-05 07:07:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:02,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:02,379 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:02,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:02,579 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:02,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:02,579 INFO L82 PathProgramCache]: Analyzing trace with hash 534001671, now seen corresponding path program 281 times [2021-06-05 07:07:02,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:02,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094706221] [2021-06-05 07:07:02,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:02,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:02,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094706221] [2021-06-05 07:07:02,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094706221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:02,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313850083] [2021-06-05 07:07:02,789 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 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 [2021-06-05 07:07:02,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:07:02,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:02,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:07:02,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:02,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:07:02,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:02,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:02,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:02,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:07:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:03,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313850083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:03,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:03,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-06-05 07:07:03,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084414693] [2021-06-05 07:07:03,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:07:03,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:03,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:07:03,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:07:03,025 INFO L87 Difference]: Start difference. First operand 394 states and 788 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:03,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:03,809 INFO L93 Difference]: Finished difference Result 566 states and 1105 transitions. [2021-06-05 07:07:03,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:07:03,809 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 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 30 [2021-06-05 07:07:03,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:03,810 INFO L225 Difference]: With dead ends: 566 [2021-06-05 07:07:03,810 INFO L226 Difference]: Without dead ends: 557 [2021-06-05 07:07:03,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 659.9ms TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 07:07:03,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-06-05 07:07:03,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 411. [2021-06-05 07:07:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0) internal successors, (820), 410 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 820 transitions. [2021-06-05 07:07:03,814 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 820 transitions. Word has length 30 [2021-06-05 07:07:03,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:03,814 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 820 transitions. [2021-06-05 07:07:03,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:03,814 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 820 transitions. [2021-06-05 07:07:03,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:03,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:03,814 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:04,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-06-05 07:07:04,015 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:04,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:04,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1416067395, now seen corresponding path program 282 times [2021-06-05 07:07:04,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:04,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183299640] [2021-06-05 07:07:04,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:04,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:04,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183299640] [2021-06-05 07:07:04,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183299640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:04,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119267465] [2021-06-05 07:07:04,227 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 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 [2021-06-05 07:07:04,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:07:04,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:04,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:07:04,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:04,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:07:04,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:04,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:04,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:04,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:07:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:04,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119267465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:04,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:04,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-06-05 07:07:04,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266057615] [2021-06-05 07:07:04,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:07:04,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:04,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:07:04,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:07:04,460 INFO L87 Difference]: Start difference. First operand 411 states and 820 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:05,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:05,216 INFO L93 Difference]: Finished difference Result 500 states and 991 transitions. [2021-06-05 07:07:05,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:07:05,216 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 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 30 [2021-06-05 07:07:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:05,217 INFO L225 Difference]: With dead ends: 500 [2021-06-05 07:07:05,217 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 07:07:05,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 760.4ms TimeCoverageRelationStatistics Valid=189, Invalid=1371, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 07:07:05,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 07:07:05,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 409. [2021-06-05 07:07:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0) internal successors, (816), 408 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:05,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 816 transitions. [2021-06-05 07:07:05,220 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 816 transitions. Word has length 30 [2021-06-05 07:07:05,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:05,220 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 816 transitions. [2021-06-05 07:07:05,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:05,220 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 816 transitions. [2021-06-05 07:07:05,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:05,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:05,221 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:05,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:05,421 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:05,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:05,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1410233183, now seen corresponding path program 283 times [2021-06-05 07:07:05,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:05,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502134745] [2021-06-05 07:07:05,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:05,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:05,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502134745] [2021-06-05 07:07:05,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502134745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:05,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849059087] [2021-06-05 07:07:05,631 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 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 [2021-06-05 07:07:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:05,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:05,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:05,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:05,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:05,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:05,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:05,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:07:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:05,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849059087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:05,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:05,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-05 07:07:05,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467156528] [2021-06-05 07:07:05,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:07:05,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:05,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:07:05,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:07:05,836 INFO L87 Difference]: Start difference. First operand 409 states and 816 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:06,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:06,568 INFO L93 Difference]: Finished difference Result 545 states and 1067 transitions. [2021-06-05 07:07:06,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:07:06,568 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 30 [2021-06-05 07:07:06,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:06,568 INFO L225 Difference]: With dead ends: 545 [2021-06-05 07:07:06,568 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 07:07:06,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 644.7ms TimeCoverageRelationStatistics Valid=165, Invalid=1241, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:07:06,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 07:07:06,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 408. [2021-06-05 07:07:06,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.0) internal successors, (814), 407 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:06,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 814 transitions. [2021-06-05 07:07:06,572 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 814 transitions. Word has length 30 [2021-06-05 07:07:06,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:06,572 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 814 transitions. [2021-06-05 07:07:06,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:06,572 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 814 transitions. [2021-06-05 07:07:06,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:06,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:06,573 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:06,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:06,773 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:06,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:06,774 INFO L82 PathProgramCache]: Analyzing trace with hash 108805615, now seen corresponding path program 284 times [2021-06-05 07:07:06,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:06,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378160894] [2021-06-05 07:07:06,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:06,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:06,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378160894] [2021-06-05 07:07:06,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378160894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:06,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633202563] [2021-06-05 07:07:06,985 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 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 [2021-06-05 07:07:07,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:07:07,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:07,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:07,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:07,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:07,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:07,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:07,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:07,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:07:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:07,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633202563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:07,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:07,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 25 [2021-06-05 07:07:07,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081466945] [2021-06-05 07:07:07,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:07:07,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:07,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:07:07,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:07:07,209 INFO L87 Difference]: Start difference. First operand 408 states and 814 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:07,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:07,855 INFO L93 Difference]: Finished difference Result 547 states and 1070 transitions. [2021-06-05 07:07:07,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:07:07,855 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 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 30 [2021-06-05 07:07:07,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:07,856 INFO L225 Difference]: With dead ends: 547 [2021-06-05 07:07:07,856 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 07:07:07,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 668.6ms TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 07:07:07,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 07:07:07,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 392. [2021-06-05 07:07:07,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0051150895140664) internal successors, (784), 391 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:07,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 784 transitions. [2021-06-05 07:07:07,859 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 784 transitions. Word has length 30 [2021-06-05 07:07:07,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:07,859 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 784 transitions. [2021-06-05 07:07:07,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:07,860 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 784 transitions. [2021-06-05 07:07:07,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:07,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:07,860 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:08,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:08,060 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:08,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:08,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1302951459, now seen corresponding path program 285 times [2021-06-05 07:07:08,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:08,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625001129] [2021-06-05 07:07:08,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:08,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:08,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625001129] [2021-06-05 07:07:08,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625001129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:08,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451422180] [2021-06-05 07:07:08,259 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 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 [2021-06-05 07:07:08,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:07:08,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:08,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:07:08,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:08,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:08,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:08,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:08,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:08,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 07:07:08,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:08,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451422180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:08,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:08,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-06-05 07:07:08,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048855413] [2021-06-05 07:07:08,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:07:08,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:08,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:07:08,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:07:08,511 INFO L87 Difference]: Start difference. First operand 392 states and 784 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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) [2021-06-05 07:07:09,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:09,137 INFO L93 Difference]: Finished difference Result 564 states and 1105 transitions. [2021-06-05 07:07:09,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:07:09,138 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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 30 [2021-06-05 07:07:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:09,138 INFO L225 Difference]: With dead ends: 564 [2021-06-05 07:07:09,138 INFO L226 Difference]: Without dead ends: 555 [2021-06-05 07:07:09,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 697.5ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 07:07:09,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-06-05 07:07:09,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 409. [2021-06-05 07:07:09,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.002450980392157) internal successors, (817), 408 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:09,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 817 transitions. [2021-06-05 07:07:09,142 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 817 transitions. Word has length 30 [2021-06-05 07:07:09,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:09,142 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 817 transitions. [2021-06-05 07:07:09,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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) [2021-06-05 07:07:09,143 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 817 transitions. [2021-06-05 07:07:09,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:09,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:09,143 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:09,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:09,343 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:09,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:09,344 INFO L82 PathProgramCache]: Analyzing trace with hash -420885735, now seen corresponding path program 286 times [2021-06-05 07:07:09,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:09,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444103541] [2021-06-05 07:07:09,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:09,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:09,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444103541] [2021-06-05 07:07:09,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444103541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:09,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320111877] [2021-06-05 07:07:09,551 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 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 [2021-06-05 07:07:09,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:07:09,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:09,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:09,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:09,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:09,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:09,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:09,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:09,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:07:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:09,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320111877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:09,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:09,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 07:07:09,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700442625] [2021-06-05 07:07:09,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:07:09,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:09,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:07:09,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:07:09,789 INFO L87 Difference]: Start difference. First operand 409 states and 817 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:10,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:10,539 INFO L93 Difference]: Finished difference Result 499 states and 990 transitions. [2021-06-05 07:07:10,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:07:10,539 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 30 [2021-06-05 07:07:10,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:10,539 INFO L225 Difference]: With dead ends: 499 [2021-06-05 07:07:10,539 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 07:07:10,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 745.2ms TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:07:10,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 07:07:10,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 407. [2021-06-05 07:07:10,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.002463054187192) internal successors, (813), 406 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:10,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 813 transitions. [2021-06-05 07:07:10,543 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 813 transitions. Word has length 30 [2021-06-05 07:07:10,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:10,543 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 813 transitions. [2021-06-05 07:07:10,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:10,543 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 813 transitions. [2021-06-05 07:07:10,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:10,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:10,544 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:10,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-05 07:07:10,744 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:10,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:10,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1047780983, now seen corresponding path program 287 times [2021-06-05 07:07:10,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:10,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889400937] [2021-06-05 07:07:10,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:10,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:10,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889400937] [2021-06-05 07:07:10,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889400937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:10,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476924162] [2021-06-05 07:07:10,983 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 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 [2021-06-05 07:07:11,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:07:11,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:11,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:07:11,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:11,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:07:11,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:11,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:11,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:11,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:07:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:11,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476924162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:11,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:11,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2021-06-05 07:07:11,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279094014] [2021-06-05 07:07:11,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:07:11,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:11,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:07:11,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:07:11,185 INFO L87 Difference]: Start difference. First operand 407 states and 813 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:11,713 INFO L93 Difference]: Finished difference Result 543 states and 1064 transitions. [2021-06-05 07:07:11,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:07:11,713 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 30 [2021-06-05 07:07:11,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:11,714 INFO L225 Difference]: With dead ends: 543 [2021-06-05 07:07:11,714 INFO L226 Difference]: Without dead ends: 526 [2021-06-05 07:07:11,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 605.7ms TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:07:11,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-05 07:07:11,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 406. [2021-06-05 07:07:11,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0024691358024693) internal successors, (811), 405 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:11,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 811 transitions. [2021-06-05 07:07:11,719 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 811 transitions. Word has length 30 [2021-06-05 07:07:11,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:11,719 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 811 transitions. [2021-06-05 07:07:11,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:11,719 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 811 transitions. [2021-06-05 07:07:11,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:11,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:11,720 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:11,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 07:07:11,941 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:11,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:11,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1728147515, now seen corresponding path program 288 times [2021-06-05 07:07:11,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:11,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958870727] [2021-06-05 07:07:11,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:12,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:12,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958870727] [2021-06-05 07:07:12,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958870727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:12,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876450430] [2021-06-05 07:07:12,140 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 [2021-06-05 07:07:12,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:07:12,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:12,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:07:12,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:12,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:07:12,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:12,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:12,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:12,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:07:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:12,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876450430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:12,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:12,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-06-05 07:07:12,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311183053] [2021-06-05 07:07:12,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:07:12,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:12,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:07:12,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:07:12,371 INFO L87 Difference]: Start difference. First operand 406 states and 811 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:12,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:12,990 INFO L93 Difference]: Finished difference Result 545 states and 1067 transitions. [2021-06-05 07:07:12,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:07:12,991 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 30 [2021-06-05 07:07:12,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:12,991 INFO L225 Difference]: With dead ends: 545 [2021-06-05 07:07:12,991 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 07:07:12,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 618.3ms TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:07:12,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 07:07:12,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 393. [2021-06-05 07:07:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.0051020408163267) internal successors, (786), 392 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 786 transitions. [2021-06-05 07:07:12,995 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 786 transitions. Word has length 30 [2021-06-05 07:07:12,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:12,995 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 786 transitions. [2021-06-05 07:07:12,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:12,995 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 786 transitions. [2021-06-05 07:07:12,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:12,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:12,996 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:13,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 07:07:13,196 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:13,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:13,196 INFO L82 PathProgramCache]: Analyzing trace with hash 694457603, now seen corresponding path program 289 times [2021-06-05 07:07:13,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:13,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414018476] [2021-06-05 07:07:13,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:13,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:13,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414018476] [2021-06-05 07:07:13,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414018476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:13,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256129479] [2021-06-05 07:07:13,408 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 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 [2021-06-05 07:07:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:13,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:13,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:13,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:13,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:13,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:13,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:13,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:07:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:13,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256129479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:13,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:13,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:07:13,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172741028] [2021-06-05 07:07:13,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:07:13,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:13,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:07:13,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:07:13,671 INFO L87 Difference]: Start difference. First operand 393 states and 786 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:14,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:14,596 INFO L93 Difference]: Finished difference Result 587 states and 1146 transitions. [2021-06-05 07:07:14,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:07:14,596 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:07:14,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:14,597 INFO L225 Difference]: With dead ends: 587 [2021-06-05 07:07:14,597 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 07:07:14,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 846.0ms TimeCoverageRelationStatistics Valid=202, Invalid=1690, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:07:14,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 07:07:14,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 407. [2021-06-05 07:07:14,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0073891625615765) internal successors, (815), 406 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 815 transitions. [2021-06-05 07:07:14,601 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 815 transitions. Word has length 30 [2021-06-05 07:07:14,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:14,601 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 815 transitions. [2021-06-05 07:07:14,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:14,602 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 815 transitions. [2021-06-05 07:07:14,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:14,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:14,602 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:14,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 07:07:14,802 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:14,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:14,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1576523327, now seen corresponding path program 290 times [2021-06-05 07:07:14,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:14,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169397818] [2021-06-05 07:07:14,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:15,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:15,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169397818] [2021-06-05 07:07:15,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169397818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:15,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26782530] [2021-06-05 07:07:15,023 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:15,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:07:15,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:15,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:15,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:15,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:15,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:15,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:15,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:15,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:07:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:15,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26782530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:15,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:15,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:07:15,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76960743] [2021-06-05 07:07:15,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:07:15,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:15,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:07:15,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:07:15,285 INFO L87 Difference]: Start difference. First operand 407 states and 815 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:16,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:16,390 INFO L93 Difference]: Finished difference Result 514 states and 1013 transitions. [2021-06-05 07:07:16,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:07:16,390 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:07:16,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:16,391 INFO L225 Difference]: With dead ends: 514 [2021-06-05 07:07:16,391 INFO L226 Difference]: Without dead ends: 499 [2021-06-05 07:07:16,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 999.0ms TimeCoverageRelationStatistics Valid=232, Invalid=1748, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:07:16,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-06-05 07:07:16,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 405. [2021-06-05 07:07:16,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.007425742574257) internal successors, (811), 404 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:16,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 811 transitions. [2021-06-05 07:07:16,394 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 811 transitions. Word has length 30 [2021-06-05 07:07:16,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:16,394 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 811 transitions. [2021-06-05 07:07:16,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:16,394 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 811 transitions. [2021-06-05 07:07:16,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:16,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:16,395 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:16,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:16,595 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:16,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:16,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1249777251, now seen corresponding path program 291 times [2021-06-05 07:07:16,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:16,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837855845] [2021-06-05 07:07:16,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:16,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:16,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837855845] [2021-06-05 07:07:16,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837855845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:16,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554188709] [2021-06-05 07:07:16,805 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 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 [2021-06-05 07:07:16,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:07:16,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:16,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:07:16,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:16,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:16,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:16,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:16,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:16,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 07:07:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:17,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554188709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:17,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:17,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-06-05 07:07:17,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649151303] [2021-06-05 07:07:17,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:07:17,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:17,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:07:17,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:07:17,049 INFO L87 Difference]: Start difference. First operand 405 states and 811 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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) [2021-06-05 07:07:18,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:18,086 INFO L93 Difference]: Finished difference Result 575 states and 1125 transitions. [2021-06-05 07:07:18,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:07:18,086 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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 30 [2021-06-05 07:07:18,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:18,087 INFO L225 Difference]: With dead ends: 575 [2021-06-05 07:07:18,087 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 07:07:18,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1018.8ms TimeCoverageRelationStatistics Valid=265, Invalid=2185, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:07:18,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 07:07:18,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 414. [2021-06-05 07:07:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.002421307506053) internal successors, (827), 413 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:18,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 827 transitions. [2021-06-05 07:07:18,091 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 827 transitions. Word has length 30 [2021-06-05 07:07:18,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:18,091 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 827 transitions. [2021-06-05 07:07:18,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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) [2021-06-05 07:07:18,091 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 827 transitions. [2021-06-05 07:07:18,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:18,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:18,092 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:18,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 07:07:18,292 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:18,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:18,292 INFO L82 PathProgramCache]: Analyzing trace with hash 269261547, now seen corresponding path program 292 times [2021-06-05 07:07:18,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:18,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577448559] [2021-06-05 07:07:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:18,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:18,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577448559] [2021-06-05 07:07:18,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577448559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:18,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973320949] [2021-06-05 07:07:18,506 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 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 [2021-06-05 07:07:18,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:07:18,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:18,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:18,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:18,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:18,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:18,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:18,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:18,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:07:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:18,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973320949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:18,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:18,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:07:18,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053000041] [2021-06-05 07:07:18,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:07:18,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:18,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:07:18,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:07:18,750 INFO L87 Difference]: Start difference. First operand 414 states and 827 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:19,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:19,700 INFO L93 Difference]: Finished difference Result 574 states and 1122 transitions. [2021-06-05 07:07:19,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:07:19,701 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:07:19,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:19,701 INFO L225 Difference]: With dead ends: 574 [2021-06-05 07:07:19,701 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 07:07:19,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 961.4ms TimeCoverageRelationStatistics Valid=254, Invalid=2196, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:07:19,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 07:07:19,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 404. [2021-06-05 07:07:19,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.9925558312655087) internal successors, (803), 403 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:19,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 803 transitions. [2021-06-05 07:07:19,705 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 803 transitions. Word has length 30 [2021-06-05 07:07:19,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:19,705 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 803 transitions. [2021-06-05 07:07:19,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:19,705 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 803 transitions. [2021-06-05 07:07:19,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:19,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:19,705 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:19,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:19,906 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:19,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:19,906 INFO L82 PathProgramCache]: Analyzing trace with hash -361158861, now seen corresponding path program 293 times [2021-06-05 07:07:19,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:19,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217454981] [2021-06-05 07:07:19,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:20,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:20,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217454981] [2021-06-05 07:07:20,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217454981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:20,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530236043] [2021-06-05 07:07:20,125 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 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 [2021-06-05 07:07:20,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:07:20,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:20,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:20,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:20,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:20,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:20,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:20,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:20,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:07:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:20,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530236043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:20,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:20,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:07:20,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453912557] [2021-06-05 07:07:20,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:07:20,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:20,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:07:20,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:07:20,397 INFO L87 Difference]: Start difference. First operand 404 states and 803 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:21,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:21,229 INFO L93 Difference]: Finished difference Result 547 states and 1064 transitions. [2021-06-05 07:07:21,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:07:21,230 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:07:21,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:21,230 INFO L225 Difference]: With dead ends: 547 [2021-06-05 07:07:21,230 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 07:07:21,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 819.8ms TimeCoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:07:21,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 07:07:21,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 406. [2021-06-05 07:07:21,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.9901234567901234) internal successors, (806), 405 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 806 transitions. [2021-06-05 07:07:21,234 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 806 transitions. Word has length 30 [2021-06-05 07:07:21,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:21,234 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 806 transitions. [2021-06-05 07:07:21,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:21,234 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 806 transitions. [2021-06-05 07:07:21,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:21,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:21,235 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:21,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 07:07:21,435 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:21,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:21,435 INFO L82 PathProgramCache]: Analyzing trace with hash 520906863, now seen corresponding path program 294 times [2021-06-05 07:07:21,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:21,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588403058] [2021-06-05 07:07:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:21,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:21,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588403058] [2021-06-05 07:07:21,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588403058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:21,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383452801] [2021-06-05 07:07:21,666 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 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 [2021-06-05 07:07:21,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:07:21,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:21,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:21,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:21,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:07:21,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:21,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:21,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:21,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:07:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:21,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383452801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:21,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:21,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:07:21,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669308401] [2021-06-05 07:07:21,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:07:21,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:21,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:07:21,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:07:21,945 INFO L87 Difference]: Start difference. First operand 406 states and 806 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:22,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:22,934 INFO L93 Difference]: Finished difference Result 482 states and 949 transitions. [2021-06-05 07:07:22,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:07:22,934 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:07:22,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:22,935 INFO L225 Difference]: With dead ends: 482 [2021-06-05 07:07:22,935 INFO L226 Difference]: Without dead ends: 459 [2021-06-05 07:07:22,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 950.8ms TimeCoverageRelationStatistics Valid=196, Invalid=1610, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:07:22,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-06-05 07:07:22,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 396. [2021-06-05 07:07:22,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.0025316455696203) internal successors, (791), 395 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:22,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 791 transitions. [2021-06-05 07:07:22,938 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 791 transitions. Word has length 30 [2021-06-05 07:07:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:22,938 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 791 transitions. [2021-06-05 07:07:22,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 791 transitions. [2021-06-05 07:07:22,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:22,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:22,939 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:23,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2021-06-05 07:07:23,139 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:23,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:23,140 INFO L82 PathProgramCache]: Analyzing trace with hash -357100787, now seen corresponding path program 295 times [2021-06-05 07:07:23,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:23,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178227293] [2021-06-05 07:07:23,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:23,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:23,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:23,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178227293] [2021-06-05 07:07:23,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178227293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:23,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873257457] [2021-06-05 07:07:23,352 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 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 [2021-06-05 07:07:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:23,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:23,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:23,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:23,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:23,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:23,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:23,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:07:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:23,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873257457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:23,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:23,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-06-05 07:07:23,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982325187] [2021-06-05 07:07:23,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:07:23,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:23,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:07:23,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:07:23,619 INFO L87 Difference]: Start difference. First operand 396 states and 791 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:24,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:24,484 INFO L93 Difference]: Finished difference Result 531 states and 1039 transitions. [2021-06-05 07:07:24,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:07:24,484 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 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 30 [2021-06-05 07:07:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:24,485 INFO L225 Difference]: With dead ends: 531 [2021-06-05 07:07:24,485 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 07:07:24,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 824.3ms TimeCoverageRelationStatistics Valid=176, Invalid=1716, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:07:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 07:07:24,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 391. [2021-06-05 07:07:24,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.005128205128205) internal successors, (782), 390 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:24,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 782 transitions. [2021-06-05 07:07:24,488 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 782 transitions. Word has length 30 [2021-06-05 07:07:24,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:24,488 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 782 transitions. [2021-06-05 07:07:24,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:24,488 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 782 transitions. [2021-06-05 07:07:24,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:24,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:24,489 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:24,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:24,689 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:24,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:24,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1364460623, now seen corresponding path program 296 times [2021-06-05 07:07:24,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:24,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616379619] [2021-06-05 07:07:24,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:24,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:24,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616379619] [2021-06-05 07:07:24,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616379619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:24,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376128133] [2021-06-05 07:07:24,919 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 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 [2021-06-05 07:07:24,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:07:24,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:24,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:24,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:25,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:25,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:25,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:25,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:25,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:07:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:25,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376128133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:25,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:25,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:07:25,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278997702] [2021-06-05 07:07:25,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:07:25,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:25,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:07:25,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:07:25,281 INFO L87 Difference]: Start difference. First operand 391 states and 782 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:26,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:26,071 INFO L93 Difference]: Finished difference Result 574 states and 1123 transitions. [2021-06-05 07:07:26,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:07:26,072 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:07:26,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:26,072 INFO L225 Difference]: With dead ends: 574 [2021-06-05 07:07:26,072 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 07:07:26,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 850.1ms TimeCoverageRelationStatistics Valid=217, Invalid=1945, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:07:26,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 07:07:26,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 409. [2021-06-05 07:07:26,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.002450980392157) internal successors, (817), 408 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:26,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 817 transitions. [2021-06-05 07:07:26,076 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 817 transitions. Word has length 30 [2021-06-05 07:07:26,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:26,076 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 817 transitions. [2021-06-05 07:07:26,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:26,076 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 817 transitions. [2021-06-05 07:07:26,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:26,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:26,077 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:26,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-06-05 07:07:26,277 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:26,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:26,278 INFO L82 PathProgramCache]: Analyzing trace with hash -482394899, now seen corresponding path program 297 times [2021-06-05 07:07:26,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:26,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284515506] [2021-06-05 07:07:26,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:26,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:26,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284515506] [2021-06-05 07:07:26,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284515506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:26,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746879791] [2021-06-05 07:07:26,505 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 [2021-06-05 07:07:26,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:07:26,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:26,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:07:26,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:26,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:26,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:26,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:26,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:26,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 07:07:26,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:26,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746879791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:26,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:26,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:07:26,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283671023] [2021-06-05 07:07:26,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:07:26,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:26,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:07:26,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:07:26,903 INFO L87 Difference]: Start difference. First operand 409 states and 817 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:27,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:27,947 INFO L93 Difference]: Finished difference Result 509 states and 1008 transitions. [2021-06-05 07:07:27,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:07:27,947 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:07:27,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:27,948 INFO L225 Difference]: With dead ends: 509 [2021-06-05 07:07:27,948 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 07:07:27,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1103.9ms TimeCoverageRelationStatistics Valid=270, Invalid=2180, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:07:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 07:07:27,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 407. [2021-06-05 07:07:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.002463054187192) internal successors, (813), 406 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:27,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 813 transitions. [2021-06-05 07:07:27,953 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 813 transitions. Word has length 30 [2021-06-05 07:07:27,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:27,953 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 813 transitions. [2021-06-05 07:07:27,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:27,953 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 813 transitions. [2021-06-05 07:07:27,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:27,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:27,953 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:28,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:28,154 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:28,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:28,154 INFO L82 PathProgramCache]: Analyzing trace with hash 986271819, now seen corresponding path program 298 times [2021-06-05 07:07:28,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:28,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740177695] [2021-06-05 07:07:28,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:28,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:28,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740177695] [2021-06-05 07:07:28,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740177695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:28,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626903172] [2021-06-05 07:07:28,380 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 [2021-06-05 07:07:28,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:07:28,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:28,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:28,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:28,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:28,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:28,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:28,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:28,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:07:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:28,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626903172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:28,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:28,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:07:28,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689129328] [2021-06-05 07:07:28,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:07:28,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:28,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:07:28,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:07:28,715 INFO L87 Difference]: Start difference. First operand 407 states and 813 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:29,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:29,513 INFO L93 Difference]: Finished difference Result 559 states and 1095 transitions. [2021-06-05 07:07:29,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:07:29,513 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:07:29,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:29,514 INFO L225 Difference]: With dead ends: 559 [2021-06-05 07:07:29,514 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 07:07:29,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 854.5ms TimeCoverageRelationStatistics Valid=213, Invalid=1857, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:07:29,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 07:07:29,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 406. [2021-06-05 07:07:29,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0024691358024693) internal successors, (811), 405 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:29,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 811 transitions. [2021-06-05 07:07:29,518 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 811 transitions. Word has length 30 [2021-06-05 07:07:29,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:29,518 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 811 transitions. [2021-06-05 07:07:29,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:29,518 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 811 transitions. [2021-06-05 07:07:29,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:29,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:29,518 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:29,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-05 07:07:29,719 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:29,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:29,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1789656679, now seen corresponding path program 299 times [2021-06-05 07:07:29,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:29,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982338352] [2021-06-05 07:07:29,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:29,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:29,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982338352] [2021-06-05 07:07:29,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982338352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:29,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436401733] [2021-06-05 07:07:29,945 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 [2021-06-05 07:07:29,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:07:29,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:29,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:07:29,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:30,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:07:30,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:30,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:30,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:30,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:07:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:30,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436401733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:30,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:30,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:07:30,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052676083] [2021-06-05 07:07:30,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:07:30,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:30,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:07:30,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:07:30,311 INFO L87 Difference]: Start difference. First operand 406 states and 811 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:31,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:31,137 INFO L93 Difference]: Finished difference Result 561 states and 1098 transitions. [2021-06-05 07:07:31,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:07:31,138 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:07:31,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:31,138 INFO L225 Difference]: With dead ends: 561 [2021-06-05 07:07:31,138 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 07:07:31,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 874.3ms TimeCoverageRelationStatistics Valid=222, Invalid=2034, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:07:31,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 07:07:31,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 393. [2021-06-05 07:07:31,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.0051020408163267) internal successors, (786), 392 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 786 transitions. [2021-06-05 07:07:31,142 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 786 transitions. Word has length 30 [2021-06-05 07:07:31,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:31,142 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 786 transitions. [2021-06-05 07:07:31,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:31,142 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 786 transitions. [2021-06-05 07:07:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:31,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:31,143 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:31,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-06-05 07:07:31,343 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:31,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:31,343 INFO L82 PathProgramCache]: Analyzing trace with hash 632948439, now seen corresponding path program 300 times [2021-06-05 07:07:31,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:31,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856312206] [2021-06-05 07:07:31,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:31,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:31,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856312206] [2021-06-05 07:07:31,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856312206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:31,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406540088] [2021-06-05 07:07:31,579 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 [2021-06-05 07:07:31,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:07:31,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:31,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:07:31,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:31,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:07:31,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:31,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:31,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:31,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:07:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:31,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406540088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:31,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:31,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:07:31,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625007377] [2021-06-05 07:07:31,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:07:31,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:31,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:07:31,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:07:31,936 INFO L87 Difference]: Start difference. First operand 393 states and 786 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:32,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:32,852 INFO L93 Difference]: Finished difference Result 594 states and 1161 transitions. [2021-06-05 07:07:32,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:07:32,853 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:07:32,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:32,853 INFO L225 Difference]: With dead ends: 594 [2021-06-05 07:07:32,853 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 07:07:32,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 946.1ms TimeCoverageRelationStatistics Valid=236, Invalid=2116, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:07:32,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 07:07:32,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 407. [2021-06-05 07:07:32,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0073891625615765) internal successors, (815), 406 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:32,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 815 transitions. [2021-06-05 07:07:32,857 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 815 transitions. Word has length 30 [2021-06-05 07:07:32,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:32,857 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 815 transitions. [2021-06-05 07:07:32,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:32,857 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 815 transitions. [2021-06-05 07:07:32,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:32,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:32,858 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:33,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 07:07:33,058 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:33,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:33,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1515014163, now seen corresponding path program 301 times [2021-06-05 07:07:33,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:33,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762483852] [2021-06-05 07:07:33,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:33,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:33,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:33,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762483852] [2021-06-05 07:07:33,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762483852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:33,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641838029] [2021-06-05 07:07:33,284 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 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 [2021-06-05 07:07:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:33,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:33,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:33,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:33,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:33,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:33,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:33,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:07:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:33,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641838029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:33,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:33,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:07:33,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969958008] [2021-06-05 07:07:33,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:07:33,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:33,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:07:33,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:07:33,644 INFO L87 Difference]: Start difference. First operand 407 states and 815 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:34,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:34,620 INFO L93 Difference]: Finished difference Result 519 states and 1024 transitions. [2021-06-05 07:07:34,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:07:34,621 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:07:34,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:34,621 INFO L225 Difference]: With dead ends: 519 [2021-06-05 07:07:34,621 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 07:07:34,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1073.6ms TimeCoverageRelationStatistics Valid=264, Invalid=2186, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:07:34,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 07:07:34,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 405. [2021-06-05 07:07:34,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.007425742574257) internal successors, (811), 404 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:34,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 811 transitions. [2021-06-05 07:07:34,625 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 811 transitions. Word has length 30 [2021-06-05 07:07:34,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:34,625 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 811 transitions. [2021-06-05 07:07:34,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:34,625 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 811 transitions. [2021-06-05 07:07:34,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:34,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:34,626 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:34,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-05 07:07:34,826 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:34,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:34,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1311286415, now seen corresponding path program 302 times [2021-06-05 07:07:34,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:34,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606098373] [2021-06-05 07:07:34,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:35,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:35,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606098373] [2021-06-05 07:07:35,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606098373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:35,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853845902] [2021-06-05 07:07:35,057 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 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 [2021-06-05 07:07:35,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:07:35,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:35,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:35,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:35,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:35,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:35,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:35,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:35,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:07:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:35,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853845902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:35,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:35,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:07:35,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874807339] [2021-06-05 07:07:35,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:07:35,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:35,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:07:35,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:07:35,381 INFO L87 Difference]: Start difference. First operand 405 states and 811 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:36,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:36,562 INFO L93 Difference]: Finished difference Result 589 states and 1154 transitions. [2021-06-05 07:07:36,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:07:36,562 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:07:36,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:36,563 INFO L225 Difference]: With dead ends: 589 [2021-06-05 07:07:36,563 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 07:07:36,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1059.0ms TimeCoverageRelationStatistics Valid=266, Invalid=2386, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:07:36,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 07:07:36,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 414. [2021-06-05 07:07:36,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.002421307506053) internal successors, (827), 413 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:36,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 827 transitions. [2021-06-05 07:07:36,567 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 827 transitions. Word has length 30 [2021-06-05 07:07:36,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:36,567 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 827 transitions. [2021-06-05 07:07:36,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:36,567 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 827 transitions. [2021-06-05 07:07:36,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:36,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:36,567 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:36,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:36,768 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:36,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:36,768 INFO L82 PathProgramCache]: Analyzing trace with hash 207752383, now seen corresponding path program 303 times [2021-06-05 07:07:36,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:36,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350271969] [2021-06-05 07:07:36,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:36,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:37,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:37,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350271969] [2021-06-05 07:07:37,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350271969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:37,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692912874] [2021-06-05 07:07:37,047 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 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 [2021-06-05 07:07:37,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:07:37,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:37,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:07:37,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:37,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:37,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:37,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:37,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:37,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 07:07:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:37,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692912874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:37,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:37,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:07:37,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989561785] [2021-06-05 07:07:37,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:07:37,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:37,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:07:37,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:07:37,405 INFO L87 Difference]: Start difference. First operand 414 states and 827 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:38,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:38,396 INFO L93 Difference]: Finished difference Result 588 states and 1151 transitions. [2021-06-05 07:07:38,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:07:38,396 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:07:38,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:38,397 INFO L225 Difference]: With dead ends: 588 [2021-06-05 07:07:38,397 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 07:07:38,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1166.9ms TimeCoverageRelationStatistics Valid=308, Invalid=2772, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:07:38,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 07:07:38,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 404. [2021-06-05 07:07:38,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.9925558312655087) internal successors, (803), 403 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:38,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 803 transitions. [2021-06-05 07:07:38,401 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 803 transitions. Word has length 30 [2021-06-05 07:07:38,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:38,401 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 803 transitions. [2021-06-05 07:07:38,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:38,401 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 803 transitions. [2021-06-05 07:07:38,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:38,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:38,401 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:38,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-05 07:07:38,602 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:38,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:38,602 INFO L82 PathProgramCache]: Analyzing trace with hash -422668025, now seen corresponding path program 304 times [2021-06-05 07:07:38,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:38,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853167137] [2021-06-05 07:07:38,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:38,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:38,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853167137] [2021-06-05 07:07:38,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853167137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:38,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791668752] [2021-06-05 07:07:38,846 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 [2021-06-05 07:07:38,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:07:38,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:38,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:38,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:38,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:38,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:38,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:38,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:38,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:07:39,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:39,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791668752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:39,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:39,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:07:39,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814277549] [2021-06-05 07:07:39,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:07:39,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:39,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:07:39,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:07:39,227 INFO L87 Difference]: Start difference. First operand 404 states and 803 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:40,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:40,043 INFO L93 Difference]: Finished difference Result 541 states and 1053 transitions. [2021-06-05 07:07:40,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:07:40,043 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:07:40,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:40,044 INFO L225 Difference]: With dead ends: 541 [2021-06-05 07:07:40,044 INFO L226 Difference]: Without dead ends: 532 [2021-06-05 07:07:40,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 929.7ms TimeCoverageRelationStatistics Valid=207, Invalid=1955, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:07:40,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-05 07:07:40,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 406. [2021-06-05 07:07:40,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.9901234567901234) internal successors, (806), 405 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:40,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 806 transitions. [2021-06-05 07:07:40,048 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 806 transitions. Word has length 30 [2021-06-05 07:07:40,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:40,048 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 806 transitions. [2021-06-05 07:07:40,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:40,048 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 806 transitions. [2021-06-05 07:07:40,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:40,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:40,048 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:40,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:40,249 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:40,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:40,249 INFO L82 PathProgramCache]: Analyzing trace with hash 459397699, now seen corresponding path program 305 times [2021-06-05 07:07:40,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:40,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164648648] [2021-06-05 07:07:40,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:40,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:40,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164648648] [2021-06-05 07:07:40,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164648648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:40,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879735345] [2021-06-05 07:07:40,482 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 [2021-06-05 07:07:40,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:07:40,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:40,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:40,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:40,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:40,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:40,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:40,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:40,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:07:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:40,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879735345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:40,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:40,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:07:40,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697683313] [2021-06-05 07:07:40,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:07:40,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:40,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:07:40,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:07:40,864 INFO L87 Difference]: Start difference. First operand 406 states and 806 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:41,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:41,802 INFO L93 Difference]: Finished difference Result 467 states and 919 transitions. [2021-06-05 07:07:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:07:41,802 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:07:41,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:41,803 INFO L225 Difference]: With dead ends: 467 [2021-06-05 07:07:41,803 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 07:07:41,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1047.2ms TimeCoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:07:41,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 07:07:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 396. [2021-06-05 07:07:41,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.0025316455696203) internal successors, (791), 395 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:41,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 791 transitions. [2021-06-05 07:07:41,806 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 791 transitions. Word has length 30 [2021-06-05 07:07:41,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:41,806 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 791 transitions. [2021-06-05 07:07:41,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:41,806 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 791 transitions. [2021-06-05 07:07:41,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:41,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:41,807 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:42,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:42,007 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:42,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:42,007 INFO L82 PathProgramCache]: Analyzing trace with hash -418609951, now seen corresponding path program 306 times [2021-06-05 07:07:42,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:42,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825360331] [2021-06-05 07:07:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:42,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:42,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825360331] [2021-06-05 07:07:42,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825360331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:42,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602103537] [2021-06-05 07:07:42,228 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 [2021-06-05 07:07:42,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:07:42,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:42,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:07:42,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:42,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:07:42,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:42,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:42,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:42,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:07:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:42,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602103537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:42,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:42,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:07:42,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130823626] [2021-06-05 07:07:42,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:07:42,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:42,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:07:42,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:07:42,605 INFO L87 Difference]: Start difference. First operand 396 states and 791 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:43,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:43,411 INFO L93 Difference]: Finished difference Result 535 states and 1049 transitions. [2021-06-05 07:07:43,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:07:43,411 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:07:43,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:43,412 INFO L225 Difference]: With dead ends: 535 [2021-06-05 07:07:43,412 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 07:07:43,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 936.0ms TimeCoverageRelationStatistics Valid=210, Invalid=1952, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:07:43,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 07:07:43,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 392. [2021-06-05 07:07:43,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0051150895140664) internal successors, (784), 391 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:43,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 784 transitions. [2021-06-05 07:07:43,416 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 784 transitions. Word has length 30 [2021-06-05 07:07:43,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:43,416 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 784 transitions. [2021-06-05 07:07:43,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:43,416 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 784 transitions. [2021-06-05 07:07:43,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:43,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:43,416 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:43,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:43,617 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:43,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:43,617 INFO L82 PathProgramCache]: Analyzing trace with hash -587855417, now seen corresponding path program 307 times [2021-06-05 07:07:43,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:43,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679872504] [2021-06-05 07:07:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:43,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:43,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679872504] [2021-06-05 07:07:43,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679872504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:43,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469921435] [2021-06-05 07:07:43,840 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 [2021-06-05 07:07:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:43,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:43,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:43,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:43,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:43,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:43,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:43,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:07:44,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:44,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469921435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:44,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:44,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:07:44,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661238281] [2021-06-05 07:07:44,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:07:44,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:44,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:07:44,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:07:44,182 INFO L87 Difference]: Start difference. First operand 392 states and 784 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:45,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:45,180 INFO L93 Difference]: Finished difference Result 605 states and 1184 transitions. [2021-06-05 07:07:45,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:07:45,180 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:07:45,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:45,180 INFO L225 Difference]: With dead ends: 605 [2021-06-05 07:07:45,180 INFO L226 Difference]: Without dead ends: 596 [2021-06-05 07:07:45,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 900.5ms TimeCoverageRelationStatistics Valid=237, Invalid=2115, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:07:45,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-06-05 07:07:45,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 407. [2021-06-05 07:07:45,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0098522167487687) internal successors, (816), 406 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:45,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 816 transitions. [2021-06-05 07:07:45,185 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 816 transitions. Word has length 30 [2021-06-05 07:07:45,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:45,185 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 816 transitions. [2021-06-05 07:07:45,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:45,185 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 816 transitions. [2021-06-05 07:07:45,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:45,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:45,185 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:45,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:45,385 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:45,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:45,386 INFO L82 PathProgramCache]: Analyzing trace with hash 294210307, now seen corresponding path program 308 times [2021-06-05 07:07:45,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:45,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201628757] [2021-06-05 07:07:45,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:45,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:45,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201628757] [2021-06-05 07:07:45,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201628757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:45,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106915370] [2021-06-05 07:07:45,605 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 [2021-06-05 07:07:45,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:07:45,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:45,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:45,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:45,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:45,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:45,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:45,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:45,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:07:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:45,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106915370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:45,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:45,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:07:45,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910553100] [2021-06-05 07:07:45,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:07:45,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:45,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:07:45,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:07:45,955 INFO L87 Difference]: Start difference. First operand 407 states and 816 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:47,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:47,001 INFO L93 Difference]: Finished difference Result 523 states and 1033 transitions. [2021-06-05 07:07:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:07:47,001 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:07:47,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:47,002 INFO L225 Difference]: With dead ends: 523 [2021-06-05 07:07:47,002 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 07:07:47,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1025.6ms TimeCoverageRelationStatistics Valid=265, Invalid=2185, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:07:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 07:07:47,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 405. [2021-06-05 07:07:47,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.00990099009901) internal successors, (812), 404 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:47,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 812 transitions. [2021-06-05 07:07:47,006 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 812 transitions. Word has length 30 [2021-06-05 07:07:47,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:47,006 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 812 transitions. [2021-06-05 07:07:47,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:47,006 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 812 transitions. [2021-06-05 07:07:47,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:47,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:47,006 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:47,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-06-05 07:07:47,207 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:47,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:47,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1762877025, now seen corresponding path program 309 times [2021-06-05 07:07:47,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:47,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829144368] [2021-06-05 07:07:47,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:47,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:47,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829144368] [2021-06-05 07:07:47,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829144368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:47,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860356759] [2021-06-05 07:07:47,418 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 [2021-06-05 07:07:47,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:07:47,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:47,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:07:47,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:47,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:47,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:47,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:47,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:47,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 07:07:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:47,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860356759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:47,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:47,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:07:47,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46971639] [2021-06-05 07:07:47,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:07:47,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:47,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:07:47,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:07:47,733 INFO L87 Difference]: Start difference. First operand 405 states and 812 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:48,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:48,988 INFO L93 Difference]: Finished difference Result 634 states and 1237 transitions. [2021-06-05 07:07:48,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:07:48,988 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:07:48,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:48,989 INFO L225 Difference]: With dead ends: 634 [2021-06-05 07:07:48,989 INFO L226 Difference]: Without dead ends: 617 [2021-06-05 07:07:48,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1081.7ms TimeCoverageRelationStatistics Valid=293, Invalid=2569, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:07:48,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-06-05 07:07:48,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 414. [2021-06-05 07:07:48,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.0048426150121066) internal successors, (828), 413 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:48,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 828 transitions. [2021-06-05 07:07:48,993 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 828 transitions. Word has length 30 [2021-06-05 07:07:48,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:48,994 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 828 transitions. [2021-06-05 07:07:48,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:48,994 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 828 transitions. [2021-06-05 07:07:48,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:48,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:48,994 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:49,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 07:07:49,194 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:49,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:49,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1013051473, now seen corresponding path program 310 times [2021-06-05 07:07:49,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:49,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016990221] [2021-06-05 07:07:49,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:49,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:49,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016990221] [2021-06-05 07:07:49,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016990221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:49,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327454787] [2021-06-05 07:07:49,417 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 [2021-06-05 07:07:49,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:07:49,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:49,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:49,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:49,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:49,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:49,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:49,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:49,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:07:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:49,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327454787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:49,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:49,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:07:49,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658219996] [2021-06-05 07:07:49,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:07:49,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:49,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:07:49,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:07:49,750 INFO L87 Difference]: Start difference. First operand 414 states and 828 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:50,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:50,653 INFO L93 Difference]: Finished difference Result 633 states and 1234 transitions. [2021-06-05 07:07:50,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:07:50,653 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:07:50,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:50,654 INFO L225 Difference]: With dead ends: 633 [2021-06-05 07:07:50,654 INFO L226 Difference]: Without dead ends: 589 [2021-06-05 07:07:50,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 1004.5ms TimeCoverageRelationStatistics Valid=281, Invalid=2581, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:07:50,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-05 07:07:50,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 404. [2021-06-05 07:07:50,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.9950372208436724) internal successors, (804), 403 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:50,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 804 transitions. [2021-06-05 07:07:50,658 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 804 transitions. Word has length 30 [2021-06-05 07:07:50,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:50,658 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 804 transitions. [2021-06-05 07:07:50,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:50,658 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 804 transitions. [2021-06-05 07:07:50,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:50,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:50,658 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:50,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-05 07:07:50,859 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:50,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:50,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1643471881, now seen corresponding path program 311 times [2021-06-05 07:07:50,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:50,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264136801] [2021-06-05 07:07:50,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:51,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:51,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264136801] [2021-06-05 07:07:51,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264136801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:51,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003564386] [2021-06-05 07:07:51,094 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 [2021-06-05 07:07:51,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:07:51,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:51,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:51,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:51,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:51,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:51,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:51,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:51,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:07:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:51,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003564386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:51,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:51,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:07:51,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578927533] [2021-06-05 07:07:51,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:07:51,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:51,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:07:51,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:07:51,458 INFO L87 Difference]: Start difference. First operand 404 states and 804 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:52,190 INFO L93 Difference]: Finished difference Result 560 states and 1092 transitions. [2021-06-05 07:07:52,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:07:52,190 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:07:52,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:52,191 INFO L225 Difference]: With dead ends: 560 [2021-06-05 07:07:52,191 INFO L226 Difference]: Without dead ends: 551 [2021-06-05 07:07:52,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 884.5ms TimeCoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:07:52,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-06-05 07:07:52,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 406. [2021-06-05 07:07:52,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.9925925925925927) internal successors, (807), 405 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:52,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 807 transitions. [2021-06-05 07:07:52,195 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 807 transitions. Word has length 30 [2021-06-05 07:07:52,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:52,195 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 807 transitions. [2021-06-05 07:07:52,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:52,195 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 807 transitions. [2021-06-05 07:07:52,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:52,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:52,195 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:52,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-05 07:07:52,396 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:52,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:52,396 INFO L82 PathProgramCache]: Analyzing trace with hash -761406157, now seen corresponding path program 312 times [2021-06-05 07:07:52,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:52,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47894938] [2021-06-05 07:07:52,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:52,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:52,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47894938] [2021-06-05 07:07:52,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47894938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:52,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72868731] [2021-06-05 07:07:52,621 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 [2021-06-05 07:07:52,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:07:52,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:52,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:52,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:52,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:07:52,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:52,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:52,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:52,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:07:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:52,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72868731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:52,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:52,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:07:52,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026567056] [2021-06-05 07:07:52,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:07:52,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:52,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:07:52,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:07:52,991 INFO L87 Difference]: Start difference. First operand 406 states and 807 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:53,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:53,932 INFO L93 Difference]: Finished difference Result 476 states and 938 transitions. [2021-06-05 07:07:53,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:07:53,932 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:07:53,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:53,933 INFO L225 Difference]: With dead ends: 476 [2021-06-05 07:07:53,933 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 07:07:53,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1000.5ms TimeCoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:07:53,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 07:07:53,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 396. [2021-06-05 07:07:53,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.0050632911392405) internal successors, (792), 395 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 792 transitions. [2021-06-05 07:07:53,936 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 792 transitions. Word has length 30 [2021-06-05 07:07:53,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:53,936 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 792 transitions. [2021-06-05 07:07:53,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:53,936 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 792 transitions. [2021-06-05 07:07:53,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:53,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:53,937 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:54,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:54,137 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:54,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:54,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1639413807, now seen corresponding path program 313 times [2021-06-05 07:07:54,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:54,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30399429] [2021-06-05 07:07:54,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:54,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:54,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30399429] [2021-06-05 07:07:54,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30399429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:54,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451747574] [2021-06-05 07:07:54,352 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 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 [2021-06-05 07:07:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:54,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:54,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:54,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:54,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:54,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:54,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:54,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:07:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:54,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451747574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:54,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:54,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:07:54,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257835122] [2021-06-05 07:07:54,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:07:54,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:54,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:07:54,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:07:54,719 INFO L87 Difference]: Start difference. First operand 396 states and 792 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:55,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:55,468 INFO L93 Difference]: Finished difference Result 557 states and 1093 transitions. [2021-06-05 07:07:55,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:07:55,468 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:07:55,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:55,469 INFO L225 Difference]: With dead ends: 557 [2021-06-05 07:07:55,469 INFO L226 Difference]: Without dead ends: 524 [2021-06-05 07:07:55,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 892.6ms TimeCoverageRelationStatistics Valid=212, Invalid=1950, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:07:55,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-05 07:07:55,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 393. [2021-06-05 07:07:55,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.00765306122449) internal successors, (787), 392 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:55,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 787 transitions. [2021-06-05 07:07:55,472 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 787 transitions. Word has length 30 [2021-06-05 07:07:55,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:55,472 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 787 transitions. [2021-06-05 07:07:55,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:55,473 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 787 transitions. [2021-06-05 07:07:55,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:55,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:55,473 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:55,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-05 07:07:55,673 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:55,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:55,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1153276303, now seen corresponding path program 314 times [2021-06-05 07:07:55,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:55,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264959238] [2021-06-05 07:07:55,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:55,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:55,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264959238] [2021-06-05 07:07:55,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264959238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:55,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751926201] [2021-06-05 07:07:55,905 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 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 [2021-06-05 07:07:55,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:07:55,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:55,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:55,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:56,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:56,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:56,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:56,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:56,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:07:56,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:56,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751926201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:56,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:56,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:07:56,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755839536] [2021-06-05 07:07:56,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:07:56,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:56,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:07:56,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:07:56,278 INFO L87 Difference]: Start difference. First operand 393 states and 787 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:57,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:57,179 INFO L93 Difference]: Finished difference Result 555 states and 1081 transitions. [2021-06-05 07:07:57,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:07:57,179 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:07:57,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:57,180 INFO L225 Difference]: With dead ends: 555 [2021-06-05 07:07:57,180 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 07:07:57,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 900.7ms TimeCoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:07:57,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 07:07:57,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 407. [2021-06-05 07:07:57,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.002463054187192) internal successors, (813), 406 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:57,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 813 transitions. [2021-06-05 07:07:57,187 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 813 transitions. Word has length 30 [2021-06-05 07:07:57,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:57,187 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 813 transitions. [2021-06-05 07:07:57,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:57,187 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 813 transitions. [2021-06-05 07:07:57,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:57,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:57,188 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:57,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 07:07:57,388 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:57,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:57,388 INFO L82 PathProgramCache]: Analyzing trace with hash -271210579, now seen corresponding path program 315 times [2021-06-05 07:07:57,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:57,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232826600] [2021-06-05 07:07:57,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:57,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:57,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232826600] [2021-06-05 07:07:57,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232826600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:57,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028569532] [2021-06-05 07:07:57,617 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 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 [2021-06-05 07:07:57,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:07:57,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:57,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:57,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:57,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:07:57,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:57,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:57,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:57,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:07:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:57,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028569532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:57,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:57,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:07:57,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296354137] [2021-06-05 07:07:57,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:07:57,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:57,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:07:57,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:07:57,994 INFO L87 Difference]: Start difference. First operand 407 states and 813 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:58,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:58,888 INFO L93 Difference]: Finished difference Result 480 states and 946 transitions. [2021-06-05 07:07:58,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:07:58,889 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:07:58,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:58,889 INFO L225 Difference]: With dead ends: 480 [2021-06-05 07:07:58,889 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 07:07:58,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1026.6ms TimeCoverageRelationStatistics Valid=239, Invalid=2113, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:07:58,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 07:07:58,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 405. [2021-06-05 07:07:58,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.0024752475247523) internal successors, (809), 404 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:58,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 809 transitions. [2021-06-05 07:07:58,893 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 809 transitions. Word has length 30 [2021-06-05 07:07:58,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:58,893 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 809 transitions. [2021-06-05 07:07:58,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:58,893 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 809 transitions. [2021-06-05 07:07:58,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:07:58,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:58,893 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:59,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 07:07:59,094 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:59,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:59,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1197456139, now seen corresponding path program 316 times [2021-06-05 07:07:59,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:59,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320388620] [2021-06-05 07:07:59,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:59,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:59,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320388620] [2021-06-05 07:07:59,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320388620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:59,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000018612] [2021-06-05 07:07:59,313 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 [2021-06-05 07:07:59,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:07:59,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:59,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:07:59,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:59,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:07:59,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:59,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:59,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:59,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 07:07:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:59,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000018612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:59,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:59,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:07:59,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389593433] [2021-06-05 07:07:59,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:07:59,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:59,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:07:59,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:07:59,635 INFO L87 Difference]: Start difference. First operand 405 states and 809 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:00,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:00,426 INFO L93 Difference]: Finished difference Result 554 states and 1083 transitions. [2021-06-05 07:08:00,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:08:00,426 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:08:00,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:00,426 INFO L225 Difference]: With dead ends: 554 [2021-06-05 07:08:00,426 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 07:08:00,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 807.8ms TimeCoverageRelationStatistics Valid=203, Invalid=1777, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:08:00,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 07:08:00,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 397. [2021-06-05 07:08:00,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.0025252525252526) internal successors, (793), 396 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:00,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 793 transitions. [2021-06-05 07:08:00,430 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 793 transitions. Word has length 30 [2021-06-05 07:08:00,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:00,430 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 793 transitions. [2021-06-05 07:08:00,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:00,431 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 793 transitions. [2021-06-05 07:08:00,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:00,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:00,431 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:00,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:00,631 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:00,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:00,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1149218229, now seen corresponding path program 317 times [2021-06-05 07:08:00,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:00,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728422839] [2021-06-05 07:08:00,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:00,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:00,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:00,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728422839] [2021-06-05 07:08:00,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728422839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:00,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768303386] [2021-06-05 07:08:00,846 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 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 [2021-06-05 07:08:00,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:08:00,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:00,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:08:00,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:01,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:01,232 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 18 [2021-06-05 07:08:01,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:01,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:01,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:01,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:15 [2021-06-05 07:08:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:01,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768303386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:01,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:01,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-06-05 07:08:01,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922108952] [2021-06-05 07:08:01,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 07:08:01,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:01,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 07:08:01,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:08:01,408 INFO L87 Difference]: Start difference. First operand 397 states and 793 transitions. Second operand has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:02,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:02,345 INFO L93 Difference]: Finished difference Result 537 states and 1052 transitions. [2021-06-05 07:08:02,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:08:02,346 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 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 30 [2021-06-05 07:08:02,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:02,346 INFO L225 Difference]: With dead ends: 537 [2021-06-05 07:08:02,346 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 07:08:02,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1036.6ms TimeCoverageRelationStatistics Valid=207, Invalid=1955, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:08:02,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 07:08:02,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 395. [2021-06-05 07:08:02,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.00253807106599) internal successors, (789), 394 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 789 transitions. [2021-06-05 07:08:02,350 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 789 transitions. Word has length 30 [2021-06-05 07:08:02,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:02,350 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 789 transitions. [2021-06-05 07:08:02,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:02,350 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 789 transitions. [2021-06-05 07:08:02,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:02,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:02,350 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:02,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:02,551 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:02,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:02,551 INFO L82 PathProgramCache]: Analyzing trace with hash 806240327, now seen corresponding path program 318 times [2021-06-05 07:08:02,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:02,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139546301] [2021-06-05 07:08:02,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:02,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:02,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139546301] [2021-06-05 07:08:02,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139546301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:02,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065529593] [2021-06-05 07:08:02,791 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 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 [2021-06-05 07:08:02,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:08:02,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:02,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:08:02,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:02,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:08:02,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:02,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:02,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:02,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 07:08:03,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:03,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065529593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:03,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:03,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 07:08:03,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003565201] [2021-06-05 07:08:03,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:08:03,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:03,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:08:03,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:08:03,212 INFO L87 Difference]: Start difference. First operand 395 states and 789 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:03,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:03,976 INFO L93 Difference]: Finished difference Result 535 states and 1048 transitions. [2021-06-05 07:08:03,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:08:03,977 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:08:03,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:03,977 INFO L225 Difference]: With dead ends: 535 [2021-06-05 07:08:03,977 INFO L226 Difference]: Without dead ends: 499 [2021-06-05 07:08:03,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 950.7ms TimeCoverageRelationStatistics Valid=211, Invalid=2141, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:08:03,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-06-05 07:08:03,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 390. [2021-06-05 07:08:03,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.005141388174807) internal successors, (780), 389 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 780 transitions. [2021-06-05 07:08:03,981 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 780 transitions. Word has length 30 [2021-06-05 07:08:03,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:03,981 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 780 transitions. [2021-06-05 07:08:03,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:03,981 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 780 transitions. [2021-06-05 07:08:03,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:03,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:03,982 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:04,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:04,182 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:04,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:04,182 INFO L82 PathProgramCache]: Analyzing trace with hash -2030894431, now seen corresponding path program 319 times [2021-06-05 07:08:04,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:04,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131514666] [2021-06-05 07:08:04,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:04,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:04,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131514666] [2021-06-05 07:08:04,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131514666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:04,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266675035] [2021-06-05 07:08:04,421 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 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 [2021-06-05 07:08:04,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:04,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:08:04,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:04,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:08:04,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:04,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:04,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:04,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:08:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:04,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266675035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:04,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:04,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:04,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127868620] [2021-06-05 07:08:04,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:04,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:04,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:04,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:04,787 INFO L87 Difference]: Start difference. First operand 390 states and 780 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:05,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:05,662 INFO L93 Difference]: Finished difference Result 559 states and 1095 transitions. [2021-06-05 07:08:05,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:08:05,662 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:05,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:05,663 INFO L225 Difference]: With dead ends: 559 [2021-06-05 07:08:05,663 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 07:08:05,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 887.0ms TimeCoverageRelationStatistics Valid=223, Invalid=2033, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:08:05,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 07:08:05,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 404. [2021-06-05 07:08:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.002481389578164) internal successors, (807), 403 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:05,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 807 transitions. [2021-06-05 07:08:05,667 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 807 transitions. Word has length 30 [2021-06-05 07:08:05,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:05,667 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 807 transitions. [2021-06-05 07:08:05,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:05,667 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 807 transitions. [2021-06-05 07:08:05,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:05,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:05,667 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:05,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 07:08:05,868 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:05,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:05,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1148828707, now seen corresponding path program 320 times [2021-06-05 07:08:05,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:05,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067197168] [2021-06-05 07:08:05,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:06,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:06,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067197168] [2021-06-05 07:08:06,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067197168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:06,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223858207] [2021-06-05 07:08:06,100 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 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 [2021-06-05 07:08:06,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:06,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:06,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:08:06,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:06,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:08:06,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:06,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:06,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:06,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:08:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:06,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223858207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:06,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:06,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:06,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625514866] [2021-06-05 07:08:06,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:06,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:06,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:06,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:06,490 INFO L87 Difference]: Start difference. First operand 404 states and 807 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:07,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:07,495 INFO L93 Difference]: Finished difference Result 492 states and 976 transitions. [2021-06-05 07:08:07,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:08:07,495 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:07,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:07,495 INFO L225 Difference]: With dead ends: 492 [2021-06-05 07:08:07,495 INFO L226 Difference]: Without dead ends: 477 [2021-06-05 07:08:07,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 1033.4ms TimeCoverageRelationStatistics Valid=248, Invalid=2104, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:08:07,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-05 07:08:07,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 402. [2021-06-05 07:08:07,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.002493765586035) internal successors, (803), 401 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:07,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 803 transitions. [2021-06-05 07:08:07,499 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 803 transitions. Word has length 30 [2021-06-05 07:08:07,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:07,499 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 803 transitions. [2021-06-05 07:08:07,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:07,499 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 803 transitions. [2021-06-05 07:08:07,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:07,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:07,499 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:07,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-06-05 07:08:07,700 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:07,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:07,700 INFO L82 PathProgramCache]: Analyzing trace with hash 319838011, now seen corresponding path program 321 times [2021-06-05 07:08:07,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:07,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195740703] [2021-06-05 07:08:07,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:07,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:07,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195740703] [2021-06-05 07:08:07,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195740703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:07,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959812184] [2021-06-05 07:08:07,926 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 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 [2021-06-05 07:08:07,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:08:07,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:07,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:08:07,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:08,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:08:08,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:08,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:08,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:08,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 07:08:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:08,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959812184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:08,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:08,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:08:08,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826304132] [2021-06-05 07:08:08,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:08:08,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:08,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:08:08,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:08:08,266 INFO L87 Difference]: Start difference. First operand 402 states and 803 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:09,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:09,077 INFO L93 Difference]: Finished difference Result 545 states and 1069 transitions. [2021-06-05 07:08:09,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:08:09,078 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:08:09,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:09,078 INFO L225 Difference]: With dead ends: 545 [2021-06-05 07:08:09,078 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 07:08:09,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 862.7ms TimeCoverageRelationStatistics Valid=210, Invalid=1860, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:08:09,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 07:08:09,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 401. [2021-06-05 07:08:09,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0025) internal successors, (801), 400 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 801 transitions. [2021-06-05 07:08:09,082 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 801 transitions. Word has length 30 [2021-06-05 07:08:09,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:09,082 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 801 transitions. [2021-06-05 07:08:09,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:09,082 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 801 transitions. [2021-06-05 07:08:09,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:09,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:09,083 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:09,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 07:08:09,283 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:09,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:09,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1838876809, now seen corresponding path program 322 times [2021-06-05 07:08:09,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:09,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270589235] [2021-06-05 07:08:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:09,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:09,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270589235] [2021-06-05 07:08:09,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270589235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:09,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169586183] [2021-06-05 07:08:09,511 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 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 [2021-06-05 07:08:09,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:08:09,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:09,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:08:09,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:09,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:08:09,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:09,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:09,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:09,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:08:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:09,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169586183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:09,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:09,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:09,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127761382] [2021-06-05 07:08:09,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:09,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:09,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:09,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:09,864 INFO L87 Difference]: Start difference. First operand 401 states and 801 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:10,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:10,690 INFO L93 Difference]: Finished difference Result 546 states and 1070 transitions. [2021-06-05 07:08:10,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:08:10,690 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:10,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:10,691 INFO L225 Difference]: With dead ends: 546 [2021-06-05 07:08:10,691 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 07:08:10,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 873.4ms TimeCoverageRelationStatistics Valid=215, Invalid=1947, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:08:10,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 07:08:10,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 388. [2021-06-05 07:08:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.005167958656331) internal successors, (776), 387 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:10,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 776 transitions. [2021-06-05 07:08:10,694 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 776 transitions. Word has length 30 [2021-06-05 07:08:10,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:10,695 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 776 transitions. [2021-06-05 07:08:10,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:10,695 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 776 transitions. [2021-06-05 07:08:10,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:10,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:10,695 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:10,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 07:08:10,895 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:10,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:10,896 INFO L82 PathProgramCache]: Analyzing trace with hash -33485369, now seen corresponding path program 323 times [2021-06-05 07:08:10,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:10,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145210927] [2021-06-05 07:08:10,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:11,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:11,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:11,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145210927] [2021-06-05 07:08:11,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145210927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:11,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016575877] [2021-06-05 07:08:11,123 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 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 [2021-06-05 07:08:11,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:08:11,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:11,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:08:11,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:11,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:08:11,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:11,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:11,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:11,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:08:11,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:11,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016575877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:11,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:11,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:11,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036319809] [2021-06-05 07:08:11,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:11,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:11,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:11,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:11,500 INFO L87 Difference]: Start difference. First operand 388 states and 776 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:12,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:12,616 INFO L93 Difference]: Finished difference Result 585 states and 1143 transitions. [2021-06-05 07:08:12,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:08:12,616 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:12,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:12,616 INFO L225 Difference]: With dead ends: 585 [2021-06-05 07:08:12,616 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 07:08:12,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1027.6ms TimeCoverageRelationStatistics Valid=244, Invalid=2306, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:08:12,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 07:08:12,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 402. [2021-06-05 07:08:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:12,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2021-06-05 07:08:12,620 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2021-06-05 07:08:12,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:12,620 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2021-06-05 07:08:12,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:12,620 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2021-06-05 07:08:12,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:12,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:12,621 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:12,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:12,821 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:12,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:12,821 INFO L82 PathProgramCache]: Analyzing trace with hash 848580355, now seen corresponding path program 324 times [2021-06-05 07:08:12,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:12,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953492110] [2021-06-05 07:08:12,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:13,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:13,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:13,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953492110] [2021-06-05 07:08:13,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953492110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:13,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934204643] [2021-06-05 07:08:13,054 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 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 [2021-06-05 07:08:13,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:08:13,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:13,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:08:13,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:13,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:08:13,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:13,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:13,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:13,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:08:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:13,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934204643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:13,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:13,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:13,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59737239] [2021-06-05 07:08:13,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:13,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:13,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:13,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:13,434 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:14,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:14,619 INFO L93 Difference]: Finished difference Result 509 states and 1004 transitions. [2021-06-05 07:08:14,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:08:14,620 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:14,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:14,620 INFO L225 Difference]: With dead ends: 509 [2021-06-05 07:08:14,620 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 07:08:14,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1178.8ms TimeCoverageRelationStatistics Valid=276, Invalid=2376, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:08:14,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 07:08:14,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 400. [2021-06-05 07:08:14,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.007518796992481) internal successors, (801), 399 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:14,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 801 transitions. [2021-06-05 07:08:14,624 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 801 transitions. Word has length 30 [2021-06-05 07:08:14,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:14,624 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 801 transitions. [2021-06-05 07:08:14,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:14,624 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 801 transitions. [2021-06-05 07:08:14,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:14,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:14,624 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:14,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-06-05 07:08:14,825 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:14,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:14,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1977720223, now seen corresponding path program 325 times [2021-06-05 07:08:14,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:14,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803661234] [2021-06-05 07:08:14,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:14,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:15,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:15,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803661234] [2021-06-05 07:08:15,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803661234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:15,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109556756] [2021-06-05 07:08:15,053 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 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 [2021-06-05 07:08:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:15,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:08:15,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:15,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:08:15,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:15,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:15,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:15,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:08:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:15,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109556756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:15,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:15,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:08:15,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883031891] [2021-06-05 07:08:15,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:08:15,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:15,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:08:15,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:08:15,394 INFO L87 Difference]: Start difference. First operand 400 states and 801 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:16,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:16,611 INFO L93 Difference]: Finished difference Result 583 states and 1142 transitions. [2021-06-05 07:08:16,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:08:16,612 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:08:16,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:16,612 INFO L225 Difference]: With dead ends: 583 [2021-06-05 07:08:16,612 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 07:08:16,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1077.3ms TimeCoverageRelationStatistics Valid=260, Invalid=2392, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:08:16,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 07:08:16,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 409. [2021-06-05 07:08:16,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.002450980392157) internal successors, (817), 408 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 817 transitions. [2021-06-05 07:08:16,616 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 817 transitions. Word has length 30 [2021-06-05 07:08:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:16,616 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 817 transitions. [2021-06-05 07:08:16,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:16,616 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 817 transitions. [2021-06-05 07:08:16,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:16,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:16,617 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:16,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:16,817 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:16,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:16,817 INFO L82 PathProgramCache]: Analyzing trace with hash -458681425, now seen corresponding path program 326 times [2021-06-05 07:08:16,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:16,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989797268] [2021-06-05 07:08:16,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:17,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:17,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989797268] [2021-06-05 07:08:17,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989797268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:17,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210570255] [2021-06-05 07:08:17,050 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 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 [2021-06-05 07:08:17,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:17,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:17,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:08:17,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:17,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:08:17,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:17,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:17,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:17,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:08:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:17,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210570255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:17,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:17,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:17,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181961275] [2021-06-05 07:08:17,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:17,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:17,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:17,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:17,413 INFO L87 Difference]: Start difference. First operand 409 states and 817 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:18,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:18,559 INFO L93 Difference]: Finished difference Result 582 states and 1139 transitions. [2021-06-05 07:08:18,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:08:18,560 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:18,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:18,560 INFO L225 Difference]: With dead ends: 582 [2021-06-05 07:08:18,560 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 07:08:18,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1091.5ms TimeCoverageRelationStatistics Valid=275, Invalid=2587, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:08:18,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 07:08:18,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 399. [2021-06-05 07:08:18,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.9924623115577889) internal successors, (793), 398 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:18,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 793 transitions. [2021-06-05 07:08:18,564 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 793 transitions. Word has length 30 [2021-06-05 07:08:18,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:18,564 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 793 transitions. [2021-06-05 07:08:18,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:18,564 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 793 transitions. [2021-06-05 07:08:18,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:18,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:18,565 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:18,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-05 07:08:18,765 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:18,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:18,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1089101833, now seen corresponding path program 327 times [2021-06-05 07:08:18,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:18,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576634373] [2021-06-05 07:08:18,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:19,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:19,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576634373] [2021-06-05 07:08:19,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576634373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:19,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494515792] [2021-06-05 07:08:19,000 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 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 [2021-06-05 07:08:19,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:08:19,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:19,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:08:19,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:19,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:08:19,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:19,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:19,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:19,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:08:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:19,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494515792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:19,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:19,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:19,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327224359] [2021-06-05 07:08:19,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:19,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:19,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:19,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:19,390 INFO L87 Difference]: Start difference. First operand 399 states and 793 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:20,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:20,139 INFO L93 Difference]: Finished difference Result 535 states and 1041 transitions. [2021-06-05 07:08:20,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:08:20,139 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:20,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:20,140 INFO L225 Difference]: With dead ends: 535 [2021-06-05 07:08:20,140 INFO L226 Difference]: Without dead ends: 526 [2021-06-05 07:08:20,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 929.6ms TimeCoverageRelationStatistics Valid=207, Invalid=1955, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:08:20,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-05 07:08:20,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 401. [2021-06-05 07:08:20,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.99) internal successors, (796), 400 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:20,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 796 transitions. [2021-06-05 07:08:20,144 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 796 transitions. Word has length 30 [2021-06-05 07:08:20,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:20,144 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 796 transitions. [2021-06-05 07:08:20,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:20,144 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 796 transitions. [2021-06-05 07:08:20,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:20,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:20,144 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:20,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-06-05 07:08:20,345 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:20,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:20,345 INFO L82 PathProgramCache]: Analyzing trace with hash -207036109, now seen corresponding path program 328 times [2021-06-05 07:08:20,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:20,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121514542] [2021-06-05 07:08:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:20,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:20,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:20,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121514542] [2021-06-05 07:08:20,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121514542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:20,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146924485] [2021-06-05 07:08:20,582 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 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 [2021-06-05 07:08:20,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:08:20,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:20,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:08:20,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:20,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:08:20,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:20,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:20,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:20,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:08:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:20,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146924485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:20,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:20,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:20,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560642009] [2021-06-05 07:08:20,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:20,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:20,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:20,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:20,992 INFO L87 Difference]: Start difference. First operand 401 states and 796 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:21,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:21,927 INFO L93 Difference]: Finished difference Result 456 states and 897 transitions. [2021-06-05 07:08:21,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:08:21,928 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:21,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:21,928 INFO L225 Difference]: With dead ends: 456 [2021-06-05 07:08:21,928 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 07:08:21,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1055.7ms TimeCoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:08:21,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 07:08:21,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 391. [2021-06-05 07:08:21,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0025641025641026) internal successors, (781), 390 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:21,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 781 transitions. [2021-06-05 07:08:21,932 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 781 transitions. Word has length 30 [2021-06-05 07:08:21,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:21,932 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 781 transitions. [2021-06-05 07:08:21,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:21,932 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 781 transitions. [2021-06-05 07:08:21,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:21,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:21,933 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:22,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:22,133 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:22,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:22,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1085043759, now seen corresponding path program 329 times [2021-06-05 07:08:22,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:22,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758691791] [2021-06-05 07:08:22,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:22,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:22,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758691791] [2021-06-05 07:08:22,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758691791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:22,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512024495] [2021-06-05 07:08:22,362 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 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 [2021-06-05 07:08:22,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:08:22,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:22,388 WARN L261 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 07:08:22,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:22,687 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 07:08:22,687 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 25 treesize of output 13 [2021-06-05 07:08:22,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:22,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:22,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:22,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:18 [2021-06-05 07:08:22,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:22,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512024495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:22,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:22,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:22,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49192575] [2021-06-05 07:08:22,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:22,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:22,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:22,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:22,782 INFO L87 Difference]: Start difference. First operand 391 states and 781 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:23,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:23,840 INFO L93 Difference]: Finished difference Result 537 states and 1050 transitions. [2021-06-05 07:08:23,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:08:23,840 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:23,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:23,840 INFO L225 Difference]: With dead ends: 537 [2021-06-05 07:08:23,840 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 07:08:23,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1153.0ms TimeCoverageRelationStatistics Valid=240, Invalid=2210, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:08:23,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 07:08:23,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 387. [2021-06-05 07:08:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.005181347150259) internal successors, (774), 386 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:23,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 774 transitions. [2021-06-05 07:08:23,844 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 774 transitions. Word has length 30 [2021-06-05 07:08:23,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:23,844 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 774 transitions. [2021-06-05 07:08:23,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:23,844 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 774 transitions. [2021-06-05 07:08:23,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:23,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:23,845 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:24,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable341 [2021-06-05 07:08:24,045 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:24,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:24,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1254289225, now seen corresponding path program 330 times [2021-06-05 07:08:24,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:24,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136464548] [2021-06-05 07:08:24,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:24,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:24,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136464548] [2021-06-05 07:08:24,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136464548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:24,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740527511] [2021-06-05 07:08:24,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 07:08:24,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:08:24,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:24,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:08:24,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:24,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:08:24,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:24,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:24,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:24,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:08:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:24,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740527511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:24,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:24,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:24,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169797323] [2021-06-05 07:08:24,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:24,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:24,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:24,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:24,651 INFO L87 Difference]: Start difference. First operand 387 states and 774 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:25,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:25,803 INFO L93 Difference]: Finished difference Result 600 states and 1174 transitions. [2021-06-05 07:08:25,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:08:25,804 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:25,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:25,804 INFO L225 Difference]: With dead ends: 600 [2021-06-05 07:08:25,804 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 07:08:25,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1001.3ms TimeCoverageRelationStatistics Valid=244, Invalid=2306, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:08:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 07:08:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 402. [2021-06-05 07:08:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0099750623441395) internal successors, (806), 401 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:25,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 806 transitions. [2021-06-05 07:08:25,809 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 806 transitions. Word has length 30 [2021-06-05 07:08:25,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:25,809 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 806 transitions. [2021-06-05 07:08:25,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:25,810 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 806 transitions. [2021-06-05 07:08:25,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:25,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:25,810 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:26,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 07:08:26,010 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:26,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:26,011 INFO L82 PathProgramCache]: Analyzing trace with hash -372223501, now seen corresponding path program 331 times [2021-06-05 07:08:26,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:26,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617841029] [2021-06-05 07:08:26,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:26,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:26,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617841029] [2021-06-05 07:08:26,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617841029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:26,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098274290] [2021-06-05 07:08:26,292 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 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 [2021-06-05 07:08:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:26,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:08:26,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:26,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:08:26,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:26,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:26,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:26,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:08:26,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:26,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098274290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:26,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:26,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:26,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707705132] [2021-06-05 07:08:26,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:26,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:26,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:26,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:26,679 INFO L87 Difference]: Start difference. First operand 402 states and 806 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:27,914 INFO L93 Difference]: Finished difference Result 517 states and 1021 transitions. [2021-06-05 07:08:27,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 07:08:27,914 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:27,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:27,914 INFO L225 Difference]: With dead ends: 517 [2021-06-05 07:08:27,914 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 07:08:27,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 1193.8ms TimeCoverageRelationStatistics Valid=276, Invalid=2376, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:08:27,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 07:08:27,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 400. [2021-06-05 07:08:27,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.010025062656642) internal successors, (802), 399 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:27,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 802 transitions. [2021-06-05 07:08:27,918 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 802 transitions. Word has length 30 [2021-06-05 07:08:27,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:27,918 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 802 transitions. [2021-06-05 07:08:27,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:27,918 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 802 transitions. [2021-06-05 07:08:27,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:27,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:27,919 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:28,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:28,119 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:28,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:28,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1096443217, now seen corresponding path program 332 times [2021-06-05 07:08:28,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:28,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56769770] [2021-06-05 07:08:28,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:28,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:28,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56769770] [2021-06-05 07:08:28,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56769770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:28,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118227299] [2021-06-05 07:08:28,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 07:08:28,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:28,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:28,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:08:28,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:28,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:08:28,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:28,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:28,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:28,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:08:28,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:28,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118227299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:28,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:28,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:08:28,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584417461] [2021-06-05 07:08:28,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:08:28,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:28,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:08:28,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:08:28,678 INFO L87 Difference]: Start difference. First operand 400 states and 802 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:29,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:29,805 INFO L93 Difference]: Finished difference Result 628 states and 1225 transitions. [2021-06-05 07:08:29,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:08:29,806 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:08:29,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:29,806 INFO L225 Difference]: With dead ends: 628 [2021-06-05 07:08:29,806 INFO L226 Difference]: Without dead ends: 611 [2021-06-05 07:08:29,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1033.5ms TimeCoverageRelationStatistics Valid=260, Invalid=2392, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:08:29,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-05 07:08:29,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 409. [2021-06-05 07:08:29,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0049019607843137) internal successors, (818), 408 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:29,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 818 transitions. [2021-06-05 07:08:29,811 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 818 transitions. Word has length 30 [2021-06-05 07:08:29,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:29,811 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 818 transitions. [2021-06-05 07:08:29,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:29,811 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 818 transitions. [2021-06-05 07:08:29,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:29,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:29,811 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:30,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 07:08:30,012 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:30,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:30,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1679485281, now seen corresponding path program 333 times [2021-06-05 07:08:30,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:30,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540863431] [2021-06-05 07:08:30,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:30,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:30,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540863431] [2021-06-05 07:08:30,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540863431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:30,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254807269] [2021-06-05 07:08:30,232 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 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 [2021-06-05 07:08:30,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:08:30,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:30,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:08:30,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:30,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:08:30,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:30,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:30,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:30,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 07:08:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:30,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254807269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:30,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:30,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:30,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872134305] [2021-06-05 07:08:30,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:30,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:30,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:30,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:30,594 INFO L87 Difference]: Start difference. First operand 409 states and 818 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:31,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:31,894 INFO L93 Difference]: Finished difference Result 635 states and 1237 transitions. [2021-06-05 07:08:31,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:08:31,894 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:31,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:31,894 INFO L225 Difference]: With dead ends: 635 [2021-06-05 07:08:31,894 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 07:08:31,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1147.7ms TimeCoverageRelationStatistics Valid=307, Invalid=2885, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:08:31,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 07:08:31,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 399. [2021-06-05 07:08:31,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.9949748743718594) internal successors, (794), 398 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:31,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 794 transitions. [2021-06-05 07:08:31,898 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 794 transitions. Word has length 30 [2021-06-05 07:08:31,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:31,899 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 794 transitions. [2021-06-05 07:08:31,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:31,899 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 794 transitions. [2021-06-05 07:08:31,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:31,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:31,899 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:32,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable345,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:32,099 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:32,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:32,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1985061607, now seen corresponding path program 334 times [2021-06-05 07:08:32,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:32,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324188581] [2021-06-05 07:08:32,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:32,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:32,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324188581] [2021-06-05 07:08:32,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324188581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:32,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176136826] [2021-06-05 07:08:32,323 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 [2021-06-05 07:08:32,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:08:32,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:32,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:08:32,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:32,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:08:32,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:32,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:32,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:32,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:08:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:32,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176136826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:32,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:32,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:32,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858432743] [2021-06-05 07:08:32,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:32,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:32,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:32,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:32,697 INFO L87 Difference]: Start difference. First operand 399 states and 794 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:33,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:33,557 INFO L93 Difference]: Finished difference Result 554 states and 1080 transitions. [2021-06-05 07:08:33,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:08:33,558 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:33,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:33,558 INFO L225 Difference]: With dead ends: 554 [2021-06-05 07:08:33,558 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 07:08:33,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 877.4ms TimeCoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:08:33,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 07:08:33,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 401. [2021-06-05 07:08:33,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.9925) internal successors, (797), 400 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:33,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 797 transitions. [2021-06-05 07:08:33,562 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 797 transitions. Word has length 30 [2021-06-05 07:08:33,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:33,562 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 797 transitions. [2021-06-05 07:08:33,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:33,562 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 797 transitions. [2021-06-05 07:08:33,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:33,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:33,563 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:33,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2021-06-05 07:08:33,763 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:33,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:33,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1427839965, now seen corresponding path program 335 times [2021-06-05 07:08:33,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:33,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283399480] [2021-06-05 07:08:33,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:33,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:33,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283399480] [2021-06-05 07:08:33,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283399480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:33,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31782544] [2021-06-05 07:08:33,990 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 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 [2021-06-05 07:08:34,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:08:34,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:34,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:08:34,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:34,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:08:34,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:34,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:34,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:34,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:08:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:34,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31782544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:34,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:34,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:34,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887959645] [2021-06-05 07:08:34,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:34,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:34,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:34,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:34,365 INFO L87 Difference]: Start difference. First operand 401 states and 797 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:35,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:35,344 INFO L93 Difference]: Finished difference Result 468 states and 922 transitions. [2021-06-05 07:08:35,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:08:35,344 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:35,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:35,345 INFO L225 Difference]: With dead ends: 468 [2021-06-05 07:08:35,345 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 07:08:35,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1001.3ms TimeCoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:08:35,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 07:08:35,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 391. [2021-06-05 07:08:35,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.005128205128205) internal successors, (782), 390 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 782 transitions. [2021-06-05 07:08:35,348 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 782 transitions. Word has length 30 [2021-06-05 07:08:35,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:35,348 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 782 transitions. [2021-06-05 07:08:35,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:35,348 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 782 transitions. [2021-06-05 07:08:35,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:35,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:35,349 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:35,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:35,549 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:35,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:35,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1989119681, now seen corresponding path program 336 times [2021-06-05 07:08:35,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:35,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124624437] [2021-06-05 07:08:35,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:35,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:35,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124624437] [2021-06-05 07:08:35,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124624437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:35,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509466399] [2021-06-05 07:08:35,778 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 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 [2021-06-05 07:08:35,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:08:35,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:35,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 07:08:35,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:35,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:08:35,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:35,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:35,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:35,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:08:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:36,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509466399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:36,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:36,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:36,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053517110] [2021-06-05 07:08:36,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:36,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:36,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:36,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:36,167 INFO L87 Difference]: Start difference. First operand 391 states and 782 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:37,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:37,142 INFO L93 Difference]: Finished difference Result 553 states and 1085 transitions. [2021-06-05 07:08:37,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:08:37,143 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:37,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:37,143 INFO L225 Difference]: With dead ends: 553 [2021-06-05 07:08:37,143 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 07:08:37,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 985.6ms TimeCoverageRelationStatistics Valid=224, Invalid=2128, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:08:37,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 07:08:37,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 388. [2021-06-05 07:08:37,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.007751937984496) internal successors, (777), 387 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:37,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 777 transitions. [2021-06-05 07:08:37,147 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 777 transitions. Word has length 30 [2021-06-05 07:08:37,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:37,147 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 777 transitions. [2021-06-05 07:08:37,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:37,147 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 777 transitions. [2021-06-05 07:08:37,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:37,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:37,147 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:37,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-06-05 07:08:37,348 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:37,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:37,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1819710111, now seen corresponding path program 337 times [2021-06-05 07:08:37,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:37,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887149938] [2021-06-05 07:08:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:37,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:37,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887149938] [2021-06-05 07:08:37,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887149938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:37,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734526020] [2021-06-05 07:08:37,584 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 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 [2021-06-05 07:08:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:37,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:08:37,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:37,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:08:37,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:37,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:37,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:37,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:08:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:37,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734526020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:37,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:37,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:37,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718345136] [2021-06-05 07:08:37,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:37,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:37,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:37,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:37,963 INFO L87 Difference]: Start difference. First operand 388 states and 777 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:38,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:38,875 INFO L93 Difference]: Finished difference Result 549 states and 1069 transitions. [2021-06-05 07:08:38,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:08:38,876 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:38,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:38,876 INFO L225 Difference]: With dead ends: 549 [2021-06-05 07:08:38,876 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 07:08:38,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 901.1ms TimeCoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:08:38,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 07:08:38,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 402. [2021-06-05 07:08:38,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.002493765586035) internal successors, (803), 401 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:38,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 803 transitions. [2021-06-05 07:08:38,880 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 803 transitions. Word has length 30 [2021-06-05 07:08:38,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:38,880 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 803 transitions. [2021-06-05 07:08:38,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:38,880 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 803 transitions. [2021-06-05 07:08:38,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:38,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:38,881 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:39,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:39,081 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:39,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:39,081 INFO L82 PathProgramCache]: Analyzing trace with hash -937644387, now seen corresponding path program 338 times [2021-06-05 07:08:39,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:39,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608180674] [2021-06-05 07:08:39,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:39,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:39,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608180674] [2021-06-05 07:08:39,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608180674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:39,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790259897] [2021-06-05 07:08:39,318 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 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 [2021-06-05 07:08:39,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:39,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:39,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:08:39,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:39,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:08:39,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:39,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:39,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:39,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:08:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:39,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790259897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:39,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:39,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:39,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465592319] [2021-06-05 07:08:39,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:39,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:39,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:39,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:39,707 INFO L87 Difference]: Start difference. First operand 402 states and 803 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:40,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:40,705 INFO L93 Difference]: Finished difference Result 473 states and 932 transitions. [2021-06-05 07:08:40,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:08:40,705 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:40,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:40,706 INFO L225 Difference]: With dead ends: 473 [2021-06-05 07:08:40,706 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 07:08:40,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1026.8ms TimeCoverageRelationStatistics Valid=239, Invalid=2113, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:08:40,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 07:08:40,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 400. [2021-06-05 07:08:40,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0025062656641603) internal successors, (799), 399 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:40,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 799 transitions. [2021-06-05 07:08:40,709 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 799 transitions. Word has length 30 [2021-06-05 07:08:40,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:40,710 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 799 transitions. [2021-06-05 07:08:40,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:40,710 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 799 transitions. [2021-06-05 07:08:40,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:40,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:40,710 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:40,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:40,910 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:40,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:40,911 INFO L82 PathProgramCache]: Analyzing trace with hash 531022331, now seen corresponding path program 339 times [2021-06-05 07:08:40,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:40,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201501179] [2021-06-05 07:08:40,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:41,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:41,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201501179] [2021-06-05 07:08:41,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201501179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:41,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391297813] [2021-06-05 07:08:41,136 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 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 [2021-06-05 07:08:41,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:08:41,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:41,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:08:41,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:41,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:08:41,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:41,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:41,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:41,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:08:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:41,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391297813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:41,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:41,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:08:41,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354289492] [2021-06-05 07:08:41,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:08:41,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:41,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:08:41,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:08:41,470 INFO L87 Difference]: Start difference. First operand 400 states and 799 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:42,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:42,272 INFO L93 Difference]: Finished difference Result 548 states and 1071 transitions. [2021-06-05 07:08:42,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:08:42,273 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:08:42,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:42,273 INFO L225 Difference]: With dead ends: 548 [2021-06-05 07:08:42,273 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 07:08:42,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 815.9ms TimeCoverageRelationStatistics Valid=203, Invalid=1777, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:08:42,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 07:08:42,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 392. [2021-06-05 07:08:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.002557544757033) internal successors, (783), 391 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:42,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 783 transitions. [2021-06-05 07:08:42,277 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 783 transitions. Word has length 30 [2021-06-05 07:08:42,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:42,277 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 783 transitions. [2021-06-05 07:08:42,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:42,277 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 783 transitions. [2021-06-05 07:08:42,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:42,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:42,278 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:42,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable351 [2021-06-05 07:08:42,478 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:42,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:42,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1815652037, now seen corresponding path program 340 times [2021-06-05 07:08:42,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:42,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844030596] [2021-06-05 07:08:42,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:42,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:42,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844030596] [2021-06-05 07:08:42,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844030596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:42,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115532392] [2021-06-05 07:08:42,700 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 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 [2021-06-05 07:08:42,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:08:42,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:42,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:08:42,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:42,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:08:42,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:42,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:42,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:42,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:08:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:43,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115532392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:43,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:43,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:43,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584701692] [2021-06-05 07:08:43,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:43,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:43,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:43,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:43,082 INFO L87 Difference]: Start difference. First operand 392 states and 783 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:43,894 INFO L93 Difference]: Finished difference Result 531 states and 1040 transitions. [2021-06-05 07:08:43,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:08:43,895 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:43,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:43,895 INFO L225 Difference]: With dead ends: 531 [2021-06-05 07:08:43,895 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 07:08:43,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 856.5ms TimeCoverageRelationStatistics Valid=201, Invalid=1869, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:08:43,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 07:08:43,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 390. [2021-06-05 07:08:43,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.0025706940874035) internal successors, (779), 389 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:43,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 779 transitions. [2021-06-05 07:08:43,899 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 779 transitions. Word has length 30 [2021-06-05 07:08:43,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:43,899 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 779 transitions. [2021-06-05 07:08:43,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:43,899 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 779 transitions. [2021-06-05 07:08:43,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:43,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:43,899 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:44,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:44,100 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:44,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:44,100 INFO L82 PathProgramCache]: Analyzing trace with hash 139806519, now seen corresponding path program 341 times [2021-06-05 07:08:44,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:44,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030043075] [2021-06-05 07:08:44,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:44,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:44,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030043075] [2021-06-05 07:08:44,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030043075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:44,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744449886] [2021-06-05 07:08:44,344 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 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 [2021-06-05 07:08:44,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:08:44,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:44,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:08:44,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:44,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:08:44,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:44,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:44,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:44,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:08:44,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:44,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744449886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:44,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:44,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 07:08:44,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058191548] [2021-06-05 07:08:44,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:08:44,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:44,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:08:44,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:08:44,766 INFO L87 Difference]: Start difference. First operand 390 states and 779 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:45,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:45,592 INFO L93 Difference]: Finished difference Result 529 states and 1036 transitions. [2021-06-05 07:08:45,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:08:45,592 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:08:45,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:45,592 INFO L225 Difference]: With dead ends: 529 [2021-06-05 07:08:45,592 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 07:08:45,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 955.2ms TimeCoverageRelationStatistics Valid=211, Invalid=2141, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:08:45,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 07:08:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 386. [2021-06-05 07:08:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.005194805194805) internal successors, (772), 385 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:45,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 772 transitions. [2021-06-05 07:08:45,596 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 772 transitions. Word has length 30 [2021-06-05 07:08:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:45,596 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 772 transitions. [2021-06-05 07:08:45,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:45,596 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 772 transitions. [2021-06-05 07:08:45,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:45,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:45,597 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:45,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:45,797 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:45,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:45,797 INFO L82 PathProgramCache]: Analyzing trace with hash 426792195, now seen corresponding path program 342 times [2021-06-05 07:08:45,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:45,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167376452] [2021-06-05 07:08:45,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:46,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:46,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167376452] [2021-06-05 07:08:46,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167376452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:46,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248876229] [2021-06-05 07:08:46,025 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 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 [2021-06-05 07:08:46,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:08:46,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:46,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:08:46,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:46,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:08:46,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:46,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:46,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:46,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:08:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:46,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248876229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:46,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:46,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:46,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278229501] [2021-06-05 07:08:46,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:46,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:46,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:46,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:46,399 INFO L87 Difference]: Start difference. First operand 386 states and 772 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:47,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:47,466 INFO L93 Difference]: Finished difference Result 640 states and 1248 transitions. [2021-06-05 07:08:47,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:08:47,467 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:47,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:47,467 INFO L225 Difference]: With dead ends: 640 [2021-06-05 07:08:47,467 INFO L226 Difference]: Without dead ends: 631 [2021-06-05 07:08:47,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1024.7ms TimeCoverageRelationStatistics Valid=248, Invalid=2404, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:08:47,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-05 07:08:47,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 397. [2021-06-05 07:08:47,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.0) internal successors, (792), 396 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:47,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 792 transitions. [2021-06-05 07:08:47,471 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 792 transitions. Word has length 30 [2021-06-05 07:08:47,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:47,472 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 792 transitions. [2021-06-05 07:08:47,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:47,472 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 792 transitions. [2021-06-05 07:08:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:47,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:47,472 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:47,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-05 07:08:47,672 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:47,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1308857919, now seen corresponding path program 343 times [2021-06-05 07:08:47,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:47,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520870934] [2021-06-05 07:08:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:47,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:47,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520870934] [2021-06-05 07:08:47,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520870934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:47,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151920015] [2021-06-05 07:08:47,899 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 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 [2021-06-05 07:08:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:47,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:08:47,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:48,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:08:48,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:48,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:48,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:48,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:08:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:48,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151920015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:48,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:48,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:48,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684431612] [2021-06-05 07:08:48,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:48,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:48,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:48,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:48,278 INFO L87 Difference]: Start difference. First operand 397 states and 792 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:49,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:49,543 INFO L93 Difference]: Finished difference Result 547 states and 1072 transitions. [2021-06-05 07:08:49,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:08:49,543 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:49,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:49,544 INFO L225 Difference]: With dead ends: 547 [2021-06-05 07:08:49,544 INFO L226 Difference]: Without dead ends: 532 [2021-06-05 07:08:49,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1179.1ms TimeCoverageRelationStatistics Valid=282, Invalid=2474, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:08:49,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-05 07:08:49,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 395. [2021-06-05 07:08:49,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.0) internal successors, (788), 394 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:49,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 788 transitions. [2021-06-05 07:08:49,547 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 788 transitions. Word has length 30 [2021-06-05 07:08:49,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:49,548 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 788 transitions. [2021-06-05 07:08:49,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:49,548 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 788 transitions. [2021-06-05 07:08:49,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:49,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:49,548 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:49,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-05 07:08:49,749 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:49,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:49,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1517442659, now seen corresponding path program 344 times [2021-06-05 07:08:49,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:49,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34945060] [2021-06-05 07:08:49,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:49,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:49,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:49,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34945060] [2021-06-05 07:08:49,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34945060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:49,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726331556] [2021-06-05 07:08:49,972 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 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 [2021-06-05 07:08:49,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:49,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:49,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:08:49,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:50,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:08:50,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:50,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:50,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:50,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:08:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:50,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726331556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:50,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:50,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:08:50,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921925782] [2021-06-05 07:08:50,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:08:50,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:50,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:08:50,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:08:50,306 INFO L87 Difference]: Start difference. First operand 395 states and 788 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:51,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:51,609 INFO L93 Difference]: Finished difference Result 677 states and 1313 transitions. [2021-06-05 07:08:51,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:08:51,609 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:08:51,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:51,610 INFO L225 Difference]: With dead ends: 677 [2021-06-05 07:08:51,610 INFO L226 Difference]: Without dead ends: 660 [2021-06-05 07:08:51,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1070.1ms TimeCoverageRelationStatistics Valid=264, Invalid=2492, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:08:51,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-06-05 07:08:51,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 404. [2021-06-05 07:08:51,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.9950372208436724) internal successors, (804), 403 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 804 transitions. [2021-06-05 07:08:51,614 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 804 transitions. Word has length 30 [2021-06-05 07:08:51,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:51,614 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 804 transitions. [2021-06-05 07:08:51,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:51,615 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 804 transitions. [2021-06-05 07:08:51,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:51,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:51,615 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:51,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-06-05 07:08:51,816 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:51,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:51,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1596139, now seen corresponding path program 345 times [2021-06-05 07:08:51,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:51,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106678221] [2021-06-05 07:08:51,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:52,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:52,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106678221] [2021-06-05 07:08:52,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106678221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:52,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995374227] [2021-06-05 07:08:52,051 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 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 [2021-06-05 07:08:52,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:08:52,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:52,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:08:52,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:52,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:08:52,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:52,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:52,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:52,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2021-06-05 07:08:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:52,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995374227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:52,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:52,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:52,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40781081] [2021-06-05 07:08:52,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:52,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:52,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:52,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:52,426 INFO L87 Difference]: Start difference. First operand 404 states and 804 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:53,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:53,893 INFO L93 Difference]: Finished difference Result 670 states and 1300 transitions. [2021-06-05 07:08:53,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:08:53,894 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:53,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:53,894 INFO L225 Difference]: With dead ends: 670 [2021-06-05 07:08:53,894 INFO L226 Difference]: Without dead ends: 626 [2021-06-05 07:08:53,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 1351.7ms TimeCoverageRelationStatistics Valid=352, Invalid=3554, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 07:08:53,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-06-05 07:08:53,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 394. [2021-06-05 07:08:53,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 1.984732824427481) internal successors, (780), 393 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:53,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 780 transitions. [2021-06-05 07:08:53,898 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 780 transitions. Word has length 30 [2021-06-05 07:08:53,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:53,898 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 780 transitions. [2021-06-05 07:08:53,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:53,899 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 780 transitions. [2021-06-05 07:08:53,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:53,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:53,899 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:54,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:54,100 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:54,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:54,100 INFO L82 PathProgramCache]: Analyzing trace with hash -628824269, now seen corresponding path program 346 times [2021-06-05 07:08:54,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:54,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640327145] [2021-06-05 07:08:54,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:54,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:54,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:54,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640327145] [2021-06-05 07:08:54,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640327145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:54,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258847025] [2021-06-05 07:08:54,340 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 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 [2021-06-05 07:08:54,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:08:54,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:54,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:08:54,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:54,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:08:54,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:54,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:54,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:54,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:08:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:54,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258847025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:54,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:54,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:54,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550381917] [2021-06-05 07:08:54,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:54,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:54,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:54,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:54,717 INFO L87 Difference]: Start difference. First operand 394 states and 780 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:55,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:55,818 INFO L93 Difference]: Finished difference Result 565 states and 1099 transitions. [2021-06-05 07:08:55,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:08:55,818 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:55,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:55,819 INFO L225 Difference]: With dead ends: 565 [2021-06-05 07:08:55,819 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 07:08:55,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 931.9ms TimeCoverageRelationStatistics Valid=213, Invalid=2043, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:08:55,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 07:08:55,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 396. [2021-06-05 07:08:55,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.9822784810126581) internal successors, (783), 395 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:55,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 783 transitions. [2021-06-05 07:08:55,823 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 783 transitions. Word has length 30 [2021-06-05 07:08:55,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:55,823 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 783 transitions. [2021-06-05 07:08:55,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:55,823 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 783 transitions. [2021-06-05 07:08:55,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:55,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:55,824 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:56,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-06-05 07:08:56,024 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:56,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:56,025 INFO L82 PathProgramCache]: Analyzing trace with hash 253241455, now seen corresponding path program 347 times [2021-06-05 07:08:56,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:56,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230199427] [2021-06-05 07:08:56,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:56,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:56,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230199427] [2021-06-05 07:08:56,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230199427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:56,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686299284] [2021-06-05 07:08:56,258 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 [2021-06-05 07:08:56,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:08:56,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:56,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:08:56,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:56,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:08:56,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:56,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:56,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:56,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:08:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:56,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686299284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:56,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:56,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:56,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924905849] [2021-06-05 07:08:56,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:56,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:56,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:56,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:56,649 INFO L87 Difference]: Start difference. First operand 396 states and 783 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:57,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:57,782 INFO L93 Difference]: Finished difference Result 473 states and 928 transitions. [2021-06-05 07:08:57,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:08:57,782 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:57,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:57,783 INFO L225 Difference]: With dead ends: 473 [2021-06-05 07:08:57,783 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 07:08:57,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1058.9ms TimeCoverageRelationStatistics Valid=240, Invalid=2112, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:08:57,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 07:08:57,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 386. [2021-06-05 07:08:57,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 1.9948051948051948) internal successors, (768), 385 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:57,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 768 transitions. [2021-06-05 07:08:57,787 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 768 transitions. Word has length 30 [2021-06-05 07:08:57,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:57,787 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 768 transitions. [2021-06-05 07:08:57,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:57,787 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 768 transitions. [2021-06-05 07:08:57,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:57,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:57,787 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:57,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-05 07:08:57,988 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:57,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:57,988 INFO L82 PathProgramCache]: Analyzing trace with hash -624766195, now seen corresponding path program 348 times [2021-06-05 07:08:57,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:57,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678183176] [2021-06-05 07:08:57,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:58,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:58,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678183176] [2021-06-05 07:08:58,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678183176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:58,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195133360] [2021-06-05 07:08:58,208 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 [2021-06-05 07:08:58,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:08:58,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:58,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 07:08:58,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:58,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:08:58,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:08:58,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:08:58,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:08:58,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:08:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:58,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195133360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:58,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:58,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:08:58,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683960917] [2021-06-05 07:08:58,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:08:58,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:58,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:08:58,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:08:58,596 INFO L87 Difference]: Start difference. First operand 386 states and 768 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:59,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:59,598 INFO L93 Difference]: Finished difference Result 568 states and 1112 transitions. [2021-06-05 07:08:59,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:08:59,598 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:08:59,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:59,599 INFO L225 Difference]: With dead ends: 568 [2021-06-05 07:08:59,599 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 07:08:59,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1038.1ms TimeCoverageRelationStatistics Valid=234, Invalid=2316, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:08:59,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 07:08:59,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 383. [2021-06-05 07:08:59,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 1.9973821989528795) internal successors, (763), 382 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:59,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 763 transitions. [2021-06-05 07:08:59,603 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 763 transitions. Word has length 30 [2021-06-05 07:08:59,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:59,603 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 763 transitions. [2021-06-05 07:08:59,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:59,603 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 763 transitions. [2021-06-05 07:08:59,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:08:59,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:59,603 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:59,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,359 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:59,803 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:59,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:59,804 INFO L82 PathProgramCache]: Analyzing trace with hash -138628691, now seen corresponding path program 349 times [2021-06-05 07:08:59,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:59,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617130197] [2021-06-05 07:08:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:59,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:00,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:00,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617130197] [2021-06-05 07:09:00,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617130197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:00,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187131488] [2021-06-05 07:09:00,034 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 [2021-06-05 07:09:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:00,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:09:00,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:00,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:09:00,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:00,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:00,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:00,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:09:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:00,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187131488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:00,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:00,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:09:00,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443183534] [2021-06-05 07:09:00,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:09:00,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:00,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:09:00,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:09:00,410 INFO L87 Difference]: Start difference. First operand 383 states and 763 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:01,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:01,423 INFO L93 Difference]: Finished difference Result 555 states and 1078 transitions. [2021-06-05 07:09:01,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:09:01,424 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:09:01,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:01,424 INFO L225 Difference]: With dead ends: 555 [2021-06-05 07:09:01,424 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 07:09:01,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 892.4ms TimeCoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:09:01,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 07:09:01,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 397. [2021-06-05 07:09:01,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 1.9924242424242424) internal successors, (789), 396 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:01,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 789 transitions. [2021-06-05 07:09:01,428 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 789 transitions. Word has length 30 [2021-06-05 07:09:01,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:01,428 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 789 transitions. [2021-06-05 07:09:01,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:01,428 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 789 transitions. [2021-06-05 07:09:01,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:09:01,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:01,429 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:01,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:01,629 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:01,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:01,629 INFO L82 PathProgramCache]: Analyzing trace with hash 743437033, now seen corresponding path program 350 times [2021-06-05 07:09:01,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:01,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354734568] [2021-06-05 07:09:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:01,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:01,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354734568] [2021-06-05 07:09:01,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354734568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:01,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162799478] [2021-06-05 07:09:01,862 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 [2021-06-05 07:09:01,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:09:01,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:01,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:09:01,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:02,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:09:02,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:02,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:02,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:02,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:09:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:02,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162799478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:02,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:02,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:09:02,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557554702] [2021-06-05 07:09:02,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:09:02,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:02,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:09:02,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:09:02,248 INFO L87 Difference]: Start difference. First operand 397 states and 789 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:03,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:03,416 INFO L93 Difference]: Finished difference Result 480 states and 942 transitions. [2021-06-05 07:09:03,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:09:03,416 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:09:03,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:03,417 INFO L225 Difference]: With dead ends: 480 [2021-06-05 07:09:03,417 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 07:09:03,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1033.0ms TimeCoverageRelationStatistics Valid=239, Invalid=2113, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:09:03,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 07:09:03,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 395. [2021-06-05 07:09:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.9923857868020305) internal successors, (785), 394 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 785 transitions. [2021-06-05 07:09:03,420 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 785 transitions. Word has length 30 [2021-06-05 07:09:03,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:03,420 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 785 transitions. [2021-06-05 07:09:03,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:03,421 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 785 transitions. [2021-06-05 07:09:03,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:09:03,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:03,421 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:03,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:03,621 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:03,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:03,622 INFO L82 PathProgramCache]: Analyzing trace with hash -2082863545, now seen corresponding path program 351 times [2021-06-05 07:09:03,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:03,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319481311] [2021-06-05 07:09:03,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:03,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:03,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319481311] [2021-06-05 07:09:03,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319481311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:03,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508009890] [2021-06-05 07:09:03,845 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 [2021-06-05 07:09:03,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:09:03,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:03,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:09:03,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:04,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:09:04,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:04,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:04,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:04,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:09:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:04,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508009890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:04,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:04,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:09:04,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521345885] [2021-06-05 07:09:04,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:09:04,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:04,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:09:04,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:09:04,178 INFO L87 Difference]: Start difference. First operand 395 states and 785 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:05,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:05,011 INFO L93 Difference]: Finished difference Result 554 states and 1080 transitions. [2021-06-05 07:09:05,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:09:05,011 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:09:05,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:05,012 INFO L225 Difference]: With dead ends: 554 [2021-06-05 07:09:05,012 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 07:09:05,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 814.8ms TimeCoverageRelationStatistics Valid=203, Invalid=1777, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:09:05,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 07:09:05,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 387. [2021-06-05 07:09:05,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.9922279792746114) internal successors, (769), 386 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:05,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 769 transitions. [2021-06-05 07:09:05,016 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 769 transitions. Word has length 30 [2021-06-05 07:09:05,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:05,016 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 769 transitions. [2021-06-05 07:09:05,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:05,016 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 769 transitions. [2021-06-05 07:09:05,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:09:05,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:05,016 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:05,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:05,217 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:05,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:05,217 INFO L82 PathProgramCache]: Analyzing trace with hash -134570617, now seen corresponding path program 352 times [2021-06-05 07:09:05,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:05,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400081651] [2021-06-05 07:09:05,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:05,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:05,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400081651] [2021-06-05 07:09:05,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400081651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:05,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097857579] [2021-06-05 07:09:05,438 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 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 [2021-06-05 07:09:05,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:09:05,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:05,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:09:05,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:05,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:09:05,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:05,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:05,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:05,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:09:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:05,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097857579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:05,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:05,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:09:05,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344387530] [2021-06-05 07:09:05,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:09:05,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:05,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:09:05,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:09:05,844 INFO L87 Difference]: Start difference. First operand 387 states and 769 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:06,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:06,629 INFO L93 Difference]: Finished difference Result 537 states and 1049 transitions. [2021-06-05 07:09:06,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:09:06,629 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:09:06,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:06,630 INFO L225 Difference]: With dead ends: 537 [2021-06-05 07:09:06,630 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 07:09:06,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 882.4ms TimeCoverageRelationStatistics Valid=201, Invalid=1869, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:09:06,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 07:09:06,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 385. [2021-06-05 07:09:06,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.9921875) internal successors, (765), 384 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:06,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 765 transitions. [2021-06-05 07:09:06,633 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 765 transitions. Word has length 30 [2021-06-05 07:09:06,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:06,633 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 765 transitions. [2021-06-05 07:09:06,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:06,634 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 765 transitions. [2021-06-05 07:09:06,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:09:06,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:06,634 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:06,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-06-05 07:09:06,834 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:06,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:06,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1820887939, now seen corresponding path program 353 times [2021-06-05 07:09:06,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:06,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111345858] [2021-06-05 07:09:06,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:07,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:07,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111345858] [2021-06-05 07:09:07,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111345858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:07,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537512152] [2021-06-05 07:09:07,075 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 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 [2021-06-05 07:09:07,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:09:07,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:07,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:09:07,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:07,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:09:07,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:07,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:07,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:07,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:09:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:07,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537512152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:07,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:07,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 07:09:07,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124453947] [2021-06-05 07:09:07,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:09:07,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:07,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:09:07,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:09:07,499 INFO L87 Difference]: Start difference. First operand 385 states and 765 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:08,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:08,504 INFO L93 Difference]: Finished difference Result 538 states and 1050 transitions. [2021-06-05 07:09:08,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:09:08,504 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:09:08,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:08,505 INFO L225 Difference]: With dead ends: 538 [2021-06-05 07:09:08,505 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 07:09:08,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 970.7ms TimeCoverageRelationStatistics Valid=211, Invalid=2141, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:09:08,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 07:09:08,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 382. [2021-06-05 07:09:08,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.994750656167979) internal successors, (760), 381 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:08,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 760 transitions. [2021-06-05 07:09:08,509 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 760 transitions. Word has length 30 [2021-06-05 07:09:08,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:08,509 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 760 transitions. [2021-06-05 07:09:08,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:08,509 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 760 transitions. [2021-06-05 07:09:08,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:09:08,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:08,509 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:08,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-05 07:09:08,710 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:08,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:08,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1817233993, now seen corresponding path program 354 times [2021-06-05 07:09:08,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:08,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990777882] [2021-06-05 07:09:08,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:08,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:08,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990777882] [2021-06-05 07:09:08,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990777882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:08,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572316664] [2021-06-05 07:09:08,942 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 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 [2021-06-05 07:09:08,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:09:08,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:08,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:09:08,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:09,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:09:09,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:09,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:09,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:09,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:09:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:09,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572316664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:09,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:09,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:09:09,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525756361] [2021-06-05 07:09:09,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:09:09,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:09,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:09:09,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:09:09,318 INFO L87 Difference]: Start difference. First operand 382 states and 760 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:10,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:10,284 INFO L93 Difference]: Finished difference Result 569 states and 1099 transitions. [2021-06-05 07:09:10,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:09:10,284 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:09:10,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:10,285 INFO L225 Difference]: With dead ends: 569 [2021-06-05 07:09:10,285 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 07:09:10,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 934.5ms TimeCoverageRelationStatistics Valid=224, Invalid=2226, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:09:10,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 07:09:10,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 400. [2021-06-05 07:09:10,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.9899749373433584) internal successors, (794), 399 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:10,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 794 transitions. [2021-06-05 07:09:10,289 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 794 transitions. Word has length 30 [2021-06-05 07:09:10,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:10,289 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 794 transitions. [2021-06-05 07:09:10,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:10,289 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 794 transitions. [2021-06-05 07:09:10,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:09:10,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:10,290 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:10,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 07:09:10,490 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:10,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:10,490 INFO L82 PathProgramCache]: Analyzing trace with hash -935168269, now seen corresponding path program 355 times [2021-06-05 07:09:10,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:10,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446228944] [2021-06-05 07:09:10,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:10,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:10,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446228944] [2021-06-05 07:09:10,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446228944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:10,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863817182] [2021-06-05 07:09:10,721 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 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 [2021-06-05 07:09:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:10,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:09:10,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:10,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:09:10,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:10,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:10,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:10,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:09:11,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:11,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863817182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:11,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:11,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 07:09:11,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311994880] [2021-06-05 07:09:11,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:09:11,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:11,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:09:11,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:09:11,114 INFO L87 Difference]: Start difference. First operand 400 states and 794 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:12,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:12,432 INFO L93 Difference]: Finished difference Result 473 states and 918 transitions. [2021-06-05 07:09:12,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:09:12,432 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 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 30 [2021-06-05 07:09:12,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:12,433 INFO L225 Difference]: With dead ends: 473 [2021-06-05 07:09:12,433 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 07:09:12,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1219.2ms TimeCoverageRelationStatistics Valid=278, Invalid=2584, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:09:12,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 07:09:12,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 396. [2021-06-05 07:09:12,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.989873417721519) internal successors, (786), 395 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:12,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 786 transitions. [2021-06-05 07:09:12,437 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 786 transitions. Word has length 30 [2021-06-05 07:09:12,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:12,437 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 786 transitions. [2021-06-05 07:09:12,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:12,437 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 786 transitions. [2021-06-05 07:09:12,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:09:12,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:12,437 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:12,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-05 07:09:12,638 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:12,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:12,638 INFO L82 PathProgramCache]: Analyzing trace with hash 533498449, now seen corresponding path program 356 times [2021-06-05 07:09:12,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:12,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579689871] [2021-06-05 07:09:12,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:12,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:12,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579689871] [2021-06-05 07:09:12,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579689871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:12,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025748917] [2021-06-05 07:09:12,858 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 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 [2021-06-05 07:09:12,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:09:12,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:12,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:09:12,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:13,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 07:09:13,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:13,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:13,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:13,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2021-06-05 07:09:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:13,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025748917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:13,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:13,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-06-05 07:09:13,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358639644] [2021-06-05 07:09:13,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:09:13,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:13,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:09:13,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:09:13,213 INFO L87 Difference]: Start difference. First operand 396 states and 786 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:14,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:14,176 INFO L93 Difference]: Finished difference Result 576 states and 1112 transitions. [2021-06-05 07:09:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:09:14,176 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 30 [2021-06-05 07:09:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:14,177 INFO L225 Difference]: With dead ends: 576 [2021-06-05 07:09:14,177 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 07:09:14,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 838.4ms TimeCoverageRelationStatistics Valid=210, Invalid=1860, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:09:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 07:09:14,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 383. [2021-06-05 07:09:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 1.9895287958115184) internal successors, (760), 382 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 760 transitions. [2021-06-05 07:09:14,181 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 760 transitions. Word has length 30 [2021-06-05 07:09:14,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:14,181 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 760 transitions. [2021-06-05 07:09:14,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:14,181 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 760 transitions. [2021-06-05 07:09:14,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:09:14,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:14,181 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:14,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:14,382 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:14,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:14,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1813175919, now seen corresponding path program 357 times [2021-06-05 07:09:14,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:14,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757096441] [2021-06-05 07:09:14,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:14,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:14,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757096441] [2021-06-05 07:09:14,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757096441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:14,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745966433] [2021-06-05 07:09:14,602 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 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 [2021-06-05 07:09:14,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:09:14,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:14,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:09:14,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:14,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:09:14,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:14,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:14,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:14,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:09:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:15,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745966433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:15,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:15,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 07:09:15,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909240525] [2021-06-05 07:09:15,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:09:15,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:15,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:09:15,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:09:15,020 INFO L87 Difference]: Start difference. First operand 383 states and 760 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:16,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:16,087 INFO L93 Difference]: Finished difference Result 583 states and 1121 transitions. [2021-06-05 07:09:16,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:09:16,088 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:09:16,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:16,088 INFO L225 Difference]: With dead ends: 583 [2021-06-05 07:09:16,088 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 07:09:16,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 938.0ms TimeCoverageRelationStatistics Valid=237, Invalid=2313, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:09:16,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 07:09:16,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 380. [2021-06-05 07:09:16,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 1.9894459102902375) internal successors, (754), 379 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:16,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 754 transitions. [2021-06-05 07:09:16,092 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 754 transitions. Word has length 30 [2021-06-05 07:09:16,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:16,092 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 754 transitions. [2021-06-05 07:09:16,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:16,092 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 754 transitions. [2021-06-05 07:09:16,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:09:16,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:16,092 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:16,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-06-05 07:09:16,293 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:16,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:16,293 INFO L82 PathProgramCache]: Analyzing trace with hash 142282637, now seen corresponding path program 358 times [2021-06-05 07:09:16,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:16,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5505242] [2021-06-05 07:09:16,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:16,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:16,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5505242] [2021-06-05 07:09:16,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5505242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:16,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451462445] [2021-06-05 07:09:16,533 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 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 [2021-06-05 07:09:16,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:09:16,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:16,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 07:09:16,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:16,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:09:16,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:16,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:16,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:16,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2021-06-05 07:09:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:16,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451462445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:16,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:16,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 07:09:16,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282121177] [2021-06-05 07:09:16,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:09:16,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:16,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:09:16,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:09:16,957 INFO L87 Difference]: Start difference. First operand 380 states and 754 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:17,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:17,901 INFO L93 Difference]: Finished difference Result 581 states and 1117 transitions. [2021-06-05 07:09:17,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:09:17,901 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 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 30 [2021-06-05 07:09:17,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:17,902 INFO L225 Difference]: With dead ends: 581 [2021-06-05 07:09:17,902 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 07:09:17,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 967.8ms TimeCoverageRelationStatistics Valid=218, Invalid=2232, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:09:17,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 07:09:17,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 365. [2021-06-05 07:09:17,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.0027472527472527) internal successors, (729), 364 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:17,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 729 transitions. [2021-06-05 07:09:17,905 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 729 transitions. Word has length 30 [2021-06-05 07:09:17,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:17,905 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 729 transitions. [2021-06-05 07:09:17,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:17,906 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 729 transitions. [2021-06-05 07:09:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 07:09:17,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:17,906 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:18,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:18,106 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:18,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:18,107 INFO L82 PathProgramCache]: Analyzing trace with hash -341120623, now seen corresponding path program 359 times [2021-06-05 07:09:18,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:18,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490490398] [2021-06-05 07:09:18,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:18,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:18,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490490398] [2021-06-05 07:09:18,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490490398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:18,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884869825] [2021-06-05 07:09:18,350 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 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 [2021-06-05 07:09:18,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:09:18,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:18,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 07:09:18,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:18,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:09:18,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:18,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:18,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:18,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:20 [2021-06-05 07:09:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:18,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884869825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:18,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:18,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 07:09:18,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961757625] [2021-06-05 07:09:18,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 07:09:18,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:18,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 07:09:18,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:09:18,817 INFO L87 Difference]: Start difference. First operand 365 states and 729 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:19,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:19,863 INFO L93 Difference]: Finished difference Result 517 states and 1009 transitions. [2021-06-05 07:09:19,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:09:19,863 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 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 30 [2021-06-05 07:09:19,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:19,863 INFO L225 Difference]: With dead ends: 517 [2021-06-05 07:09:19,863 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 07:09:19,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1177.9ms TimeCoverageRelationStatistics Valid=259, Invalid=2821, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:09:19,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 07:09:19,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 344. [2021-06-05 07:09:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.002915451895044) internal successors, (687), 343 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:19,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 687 transitions. [2021-06-05 07:09:19,867 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 687 transitions. Word has length 30 [2021-06-05 07:09:19,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:19,867 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 687 transitions. [2021-06-05 07:09:19,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:19,867 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 687 transitions. [2021-06-05 07:09:19,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 07:09:19,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:19,867 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:20,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:20,068 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:20,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:20,068 INFO L82 PathProgramCache]: Analyzing trace with hash -818784009, now seen corresponding path program 360 times [2021-06-05 07:09:20,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:20,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90315608] [2021-06-05 07:09:20,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:20,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:20,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90315608] [2021-06-05 07:09:20,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90315608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:20,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030252200] [2021-06-05 07:09:20,147 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 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 [2021-06-05 07:09:20,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:09:20,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:20,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:09:20,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:20,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 07:09:20,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:20,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:20,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:20,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 07:09:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:20,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030252200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:20,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:20,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 07:09:20,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678274198] [2021-06-05 07:09:20,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 07:09:20,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:20,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 07:09:20,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 07:09:20,263 INFO L87 Difference]: Start difference. First operand 344 states and 687 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) [2021-06-05 07:09:20,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:20,601 INFO L93 Difference]: Finished difference Result 550 states and 1070 transitions. [2021-06-05 07:09:20,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:09:20,602 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 34 [2021-06-05 07:09:20,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:20,602 INFO L225 Difference]: With dead ends: 550 [2021-06-05 07:09:20,602 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 07:09:20,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:09:20,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 07:09:20,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 359. [2021-06-05 07:09:20,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.9748603351955307) internal successors, (707), 358 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:20,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 707 transitions. [2021-06-05 07:09:20,606 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 707 transitions. Word has length 34 [2021-06-05 07:09:20,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:20,606 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 707 transitions. [2021-06-05 07:09:20,606 INFO L483 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) [2021-06-05 07:09:20,606 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 707 transitions. [2021-06-05 07:09:20,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:09:20,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:20,606 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:20,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,371 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:20,806 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:20,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:20,807 INFO L82 PathProgramCache]: Analyzing trace with hash 541692819, now seen corresponding path program 361 times [2021-06-05 07:09:20,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:20,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48124803] [2021-06-05 07:09:20,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:20,831 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:20,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:20,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48124803] [2021-06-05 07:09:20,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48124803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:20,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019789344] [2021-06-05 07:09:20,832 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 [2021-06-05 07:09:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:20,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 07:09:20,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:20,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019789344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:20,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:20,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 07:09:20,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449333902] [2021-06-05 07:09:20,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:09:20,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:20,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:09:20,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:09:20,900 INFO L87 Difference]: Start difference. First operand 359 states and 707 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 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) [2021-06-05 07:09:20,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:20,913 INFO L93 Difference]: Finished difference Result 814 states and 1602 transitions. [2021-06-05 07:09:20,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 07:09:20,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 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 35 [2021-06-05 07:09:20,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:20,914 INFO L225 Difference]: With dead ends: 814 [2021-06-05 07:09:20,914 INFO L226 Difference]: Without dead ends: 750 [2021-06-05 07:09:20,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:09:20,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-06-05 07:09:20,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 641. [2021-06-05 07:09:20,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 2.0515625) internal successors, (1313), 640 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:20,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1313 transitions. [2021-06-05 07:09:20,919 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1313 transitions. Word has length 35 [2021-06-05 07:09:20,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:20,919 INFO L482 AbstractCegarLoop]: Abstraction has 641 states and 1313 transitions. [2021-06-05 07:09:20,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 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) [2021-06-05 07:09:20,919 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1313 transitions. [2021-06-05 07:09:20,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:09:20,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:20,919 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:21,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:21,120 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:21,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:21,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1712932559, now seen corresponding path program 362 times [2021-06-05 07:09:21,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:21,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919465976] [2021-06-05 07:09:21,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:21,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:21,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919465976] [2021-06-05 07:09:21,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919465976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:21,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501625518] [2021-06-05 07:09:21,663 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 [2021-06-05 07:09:21,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:09:21,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:21,690 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:09:21,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:22,232 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 07:09:22,232 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 29 treesize of output 13 [2021-06-05 07:09:22,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:22,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:22,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:22,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:20 [2021-06-05 07:09:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:22,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501625518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:22,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:22,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 47 [2021-06-05 07:09:22,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371663170] [2021-06-05 07:09:22,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 07:09:22,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:22,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 07:09:22,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2130, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:09:22,534 INFO L87 Difference]: Start difference. First operand 641 states and 1313 transitions. Second operand has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:24,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:24,614 INFO L93 Difference]: Finished difference Result 928 states and 1861 transitions. [2021-06-05 07:09:24,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:09:24,614 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 07:09:24,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:24,615 INFO L225 Difference]: With dead ends: 928 [2021-06-05 07:09:24,615 INFO L226 Difference]: Without dead ends: 921 [2021-06-05 07:09:24,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 2386.1ms TimeCoverageRelationStatistics Valid=292, Invalid=5110, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 07:09:24,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-06-05 07:09:24,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 657. [2021-06-05 07:09:24,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.042682926829268) internal successors, (1340), 656 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:24,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1340 transitions. [2021-06-05 07:09:24,621 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1340 transitions. Word has length 39 [2021-06-05 07:09:24,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:24,621 INFO L482 AbstractCegarLoop]: Abstraction has 657 states and 1340 transitions. [2021-06-05 07:09:24,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:24,621 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1340 transitions. [2021-06-05 07:09:24,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:09:24,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:24,622 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:24,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,373 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:24,822 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:24,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:24,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1191839451, now seen corresponding path program 363 times [2021-06-05 07:09:24,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:24,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905553639] [2021-06-05 07:09:24,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:25,292 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:25,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:25,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905553639] [2021-06-05 07:09:25,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905553639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:25,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511881913] [2021-06-05 07:09:25,292 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 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 [2021-06-05 07:09:25,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:09:25,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:25,319 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:09:25,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:25,745 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 07:09:25,745 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 25 treesize of output 13 [2021-06-05 07:09:25,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:25,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:25,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:25,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 07:09:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:26,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511881913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:26,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:26,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 41 [2021-06-05 07:09:26,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936969934] [2021-06-05 07:09:26,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 07:09:26,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:26,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 07:09:26,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1609, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:09:26,031 INFO L87 Difference]: Start difference. First operand 657 states and 1340 transitions. Second operand has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 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) [2021-06-05 07:09:27,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:27,314 INFO L93 Difference]: Finished difference Result 798 states and 1593 transitions. [2021-06-05 07:09:27,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:09:27,314 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 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 39 [2021-06-05 07:09:27,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:27,315 INFO L225 Difference]: With dead ends: 798 [2021-06-05 07:09:27,315 INFO L226 Difference]: Without dead ends: 789 [2021-06-05 07:09:27,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1307.1ms TimeCoverageRelationStatistics Valid=166, Invalid=2384, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:09:27,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-06-05 07:09:27,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 701. [2021-06-05 07:09:27,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.037142857142857) internal successors, (1426), 700 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:27,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1426 transitions. [2021-06-05 07:09:27,321 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1426 transitions. Word has length 39 [2021-06-05 07:09:27,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:27,321 INFO L482 AbstractCegarLoop]: Abstraction has 701 states and 1426 transitions. [2021-06-05 07:09:27,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 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) [2021-06-05 07:09:27,321 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1426 transitions. [2021-06-05 07:09:27,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:09:27,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:27,321 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:27,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 07:09:27,522 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:27,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:27,522 INFO L82 PathProgramCache]: Analyzing trace with hash -309773727, now seen corresponding path program 364 times [2021-06-05 07:09:27,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:27,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749573162] [2021-06-05 07:09:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:28,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:28,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749573162] [2021-06-05 07:09:28,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749573162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:28,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976829337] [2021-06-05 07:09:28,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 07:09:28,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:09:28,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:28,028 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:09:28,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:28,451 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 07:09:28,451 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 29 treesize of output 13 [2021-06-05 07:09:28,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:28,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:28,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:28,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 07:09:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:28,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976829337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:28,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:28,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 41 [2021-06-05 07:09:28,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175102577] [2021-06-05 07:09:28,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 07:09:28,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:28,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 07:09:28,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1610, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:09:28,744 INFO L87 Difference]: Start difference. First operand 701 states and 1426 transitions. Second operand has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 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) [2021-06-05 07:09:30,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:30,223 INFO L93 Difference]: Finished difference Result 790 states and 1583 transitions. [2021-06-05 07:09:30,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:09:30,223 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 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 39 [2021-06-05 07:09:30,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:30,224 INFO L225 Difference]: With dead ends: 790 [2021-06-05 07:09:30,224 INFO L226 Difference]: Without dead ends: 775 [2021-06-05 07:09:30,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1425.2ms TimeCoverageRelationStatistics Valid=184, Invalid=2678, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:09:30,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-06-05 07:09:30,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 697. [2021-06-05 07:09:30,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 2.0373563218390807) internal successors, (1418), 696 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:30,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1418 transitions. [2021-06-05 07:09:30,229 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1418 transitions. Word has length 39 [2021-06-05 07:09:30,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:30,230 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 1418 transitions. [2021-06-05 07:09:30,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 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) [2021-06-05 07:09:30,230 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1418 transitions. [2021-06-05 07:09:30,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:09:30,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:30,230 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:30,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable376,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:30,431 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:30,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:30,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1158892991, now seen corresponding path program 365 times [2021-06-05 07:09:30,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:30,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662375825] [2021-06-05 07:09:30,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:30,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:30,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662375825] [2021-06-05 07:09:30,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662375825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:30,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822438827] [2021-06-05 07:09:30,900 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 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 [2021-06-05 07:09:30,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:09:30,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:30,927 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 07:09:30,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:31,390 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 07:09:31,390 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 25 treesize of output 13 [2021-06-05 07:09:31,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:31,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:31,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:31,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 07:09:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:31,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822438827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:31,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:31,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 43 [2021-06-05 07:09:31,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670599574] [2021-06-05 07:09:31,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 07:09:31,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:31,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 07:09:31,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1757, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:09:31,687 INFO L87 Difference]: Start difference. First operand 697 states and 1418 transitions. Second operand has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 43 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) [2021-06-05 07:09:33,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:33,003 INFO L93 Difference]: Finished difference Result 790 states and 1581 transitions. [2021-06-05 07:09:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:09:33,004 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 43 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 39 [2021-06-05 07:09:33,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:33,004 INFO L225 Difference]: With dead ends: 790 [2021-06-05 07:09:33,004 INFO L226 Difference]: Without dead ends: 773 [2021-06-05 07:09:33,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1411.0ms TimeCoverageRelationStatistics Valid=204, Invalid=2658, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:09:33,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-06-05 07:09:33,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 695. [2021-06-05 07:09:33,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 2.037463976945245) internal successors, (1414), 694 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1414 transitions. [2021-06-05 07:09:33,010 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1414 transitions. Word has length 39 [2021-06-05 07:09:33,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:33,010 INFO L482 AbstractCegarLoop]: Abstraction has 695 states and 1414 transitions. [2021-06-05 07:09:33,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 43 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) [2021-06-05 07:09:33,010 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1414 transitions. [2021-06-05 07:09:33,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:09:33,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:33,011 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:33,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 07:09:33,211 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:33,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:33,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1617035507, now seen corresponding path program 366 times [2021-06-05 07:09:33,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:33,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032914531] [2021-06-05 07:09:33,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:33,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:33,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032914531] [2021-06-05 07:09:33,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032914531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:33,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379839266] [2021-06-05 07:09:33,669 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 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 [2021-06-05 07:09:33,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:09:33,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:33,696 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 07:09:33,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:34,079 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 07:09:34,079 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 25 treesize of output 13 [2021-06-05 07:09:34,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:34,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:34,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:34,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 07:09:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:34,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379839266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:34,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:34,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 40 [2021-06-05 07:09:34,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412071807] [2021-06-05 07:09:34,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 07:09:34,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:34,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 07:09:34,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1526, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:09:34,313 INFO L87 Difference]: Start difference. First operand 695 states and 1414 transitions. Second operand has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 40 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) [2021-06-05 07:09:36,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:36,319 INFO L93 Difference]: Finished difference Result 1015 states and 2017 transitions. [2021-06-05 07:09:36,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:09:36,319 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 40 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 39 [2021-06-05 07:09:36,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:36,320 INFO L225 Difference]: With dead ends: 1015 [2021-06-05 07:09:36,320 INFO L226 Difference]: Without dead ends: 971 [2021-06-05 07:09:36,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1760.2ms TimeCoverageRelationStatistics Valid=259, Invalid=3773, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:09:36,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-06-05 07:09:36,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 684. [2021-06-05 07:09:36,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.0380673499267936) internal successors, (1392), 683 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1392 transitions. [2021-06-05 07:09:36,332 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1392 transitions. Word has length 39 [2021-06-05 07:09:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:36,332 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1392 transitions. [2021-06-05 07:09:36,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 40 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) [2021-06-05 07:09:36,332 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1392 transitions. [2021-06-05 07:09:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:09:36,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:36,333 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:36,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 07:09:36,534 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:36,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:36,542 INFO L82 PathProgramCache]: Analyzing trace with hash -719466893, now seen corresponding path program 367 times [2021-06-05 07:09:36,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:36,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345963797] [2021-06-05 07:09:36,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:37,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:37,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345963797] [2021-06-05 07:09:37,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345963797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:37,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742188478] [2021-06-05 07:09:37,126 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 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 [2021-06-05 07:09:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:37,152 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:09:37,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:37,552 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 07:09:37,552 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 29 treesize of output 13 [2021-06-05 07:09:37,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:37,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:37,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:37,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 07:09:37,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:37,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742188478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:37,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:37,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 41 [2021-06-05 07:09:37,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905947762] [2021-06-05 07:09:37,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 07:09:37,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:37,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 07:09:37,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1609, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:09:37,842 INFO L87 Difference]: Start difference. First operand 684 states and 1392 transitions. Second operand has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 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) [2021-06-05 07:09:40,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:40,049 INFO L93 Difference]: Finished difference Result 1008 states and 2003 transitions. [2021-06-05 07:09:40,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:09:40,049 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 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 39 [2021-06-05 07:09:40,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:40,050 INFO L225 Difference]: With dead ends: 1008 [2021-06-05 07:09:40,050 INFO L226 Difference]: Without dead ends: 975 [2021-06-05 07:09:40,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1911.5ms TimeCoverageRelationStatistics Valid=249, Invalid=3783, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:09:40,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-06-05 07:09:40,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 681. [2021-06-05 07:09:40,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 2.038235294117647) internal successors, (1386), 680 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1386 transitions. [2021-06-05 07:09:40,056 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1386 transitions. Word has length 39 [2021-06-05 07:09:40,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:40,057 INFO L482 AbstractCegarLoop]: Abstraction has 681 states and 1386 transitions. [2021-06-05 07:09:40,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 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) [2021-06-05 07:09:40,057 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1386 transitions. [2021-06-05 07:09:40,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:09:40,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:40,057 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:40,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-05 07:09:40,258 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:40,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:40,258 INFO L82 PathProgramCache]: Analyzing trace with hash 263437797, now seen corresponding path program 368 times [2021-06-05 07:09:40,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:40,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267059486] [2021-06-05 07:09:40,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:40,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:40,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267059486] [2021-06-05 07:09:40,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267059486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:40,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856111925] [2021-06-05 07:09:40,809 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 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 [2021-06-05 07:09:40,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:09:40,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:40,834 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:09:40,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:41,279 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 07:09:41,279 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 29 treesize of output 13 [2021-06-05 07:09:41,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:41,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:41,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:41,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 07:09:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:41,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856111925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:41,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:41,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 43 [2021-06-05 07:09:41,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702119519] [2021-06-05 07:09:41,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 07:09:41,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:41,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 07:09:41,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1773, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:09:41,606 INFO L87 Difference]: Start difference. First operand 681 states and 1386 transitions. Second operand has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 43 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) [2021-06-05 07:09:43,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:43,812 INFO L93 Difference]: Finished difference Result 1024 states and 2029 transitions. [2021-06-05 07:09:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:09:43,813 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 43 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 39 [2021-06-05 07:09:43,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:43,814 INFO L225 Difference]: With dead ends: 1024 [2021-06-05 07:09:43,814 INFO L226 Difference]: Without dead ends: 973 [2021-06-05 07:09:43,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 2009.2ms TimeCoverageRelationStatistics Valid=263, Invalid=4159, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 07:09:43,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-06-05 07:09:43,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 669. [2021-06-05 07:09:43,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 2.038922155688623) internal successors, (1362), 668 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:43,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1362 transitions. [2021-06-05 07:09:43,820 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1362 transitions. Word has length 39 [2021-06-05 07:09:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:43,820 INFO L482 AbstractCegarLoop]: Abstraction has 669 states and 1362 transitions. [2021-06-05 07:09:43,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 43 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) [2021-06-05 07:09:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1362 transitions. [2021-06-05 07:09:43,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:09:43,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:43,821 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:44,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:44,021 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:44,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:44,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1523293759, now seen corresponding path program 369 times [2021-06-05 07:09:44,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:44,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293945297] [2021-06-05 07:09:44,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:44,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:44,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293945297] [2021-06-05 07:09:44,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293945297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:44,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41459081] [2021-06-05 07:09:44,551 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 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 [2021-06-05 07:09:44,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:09:44,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:44,578 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:09:44,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:44,992 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 07:09:44,992 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 25 treesize of output 13 [2021-06-05 07:09:44,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:45,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:45,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:45,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 07:09:45,277 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:45,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41459081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:45,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:45,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 41 [2021-06-05 07:09:45,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506321835] [2021-06-05 07:09:45,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 07:09:45,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:45,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 07:09:45,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1609, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:09:45,278 INFO L87 Difference]: Start difference. First operand 669 states and 1362 transitions. Second operand has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 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) [2021-06-05 07:09:47,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:47,116 INFO L93 Difference]: Finished difference Result 968 states and 1930 transitions. [2021-06-05 07:09:47,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:09:47,116 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 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 39 [2021-06-05 07:09:47,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:47,117 INFO L225 Difference]: With dead ends: 968 [2021-06-05 07:09:47,117 INFO L226 Difference]: Without dead ends: 920 [2021-06-05 07:09:47,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1881.4ms TimeCoverageRelationStatistics Valid=249, Invalid=3783, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:09:47,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-05 07:09:47,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 666. [2021-06-05 07:09:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.039097744360902) internal successors, (1356), 665 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:47,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1356 transitions. [2021-06-05 07:09:47,123 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1356 transitions. Word has length 39 [2021-06-05 07:09:47,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:47,123 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 1356 transitions. [2021-06-05 07:09:47,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 41 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) [2021-06-05 07:09:47,123 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1356 transitions. [2021-06-05 07:09:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:09:47,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:47,123 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:47,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:47,324 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:47,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:47,324 INFO L82 PathProgramCache]: Analyzing trace with hash 236684813, now seen corresponding path program 370 times [2021-06-05 07:09:47,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:47,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933435926] [2021-06-05 07:09:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:47,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:47,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933435926] [2021-06-05 07:09:47,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933435926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:47,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925239163] [2021-06-05 07:09:47,800 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 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 [2021-06-05 07:09:47,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:09:47,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:47,825 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:09:47,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:48,289 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 07:09:48,289 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 29 treesize of output 13 [2021-06-05 07:09:48,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:48,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:48,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:48,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 07:09:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:48,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925239163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:48,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:48,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 43 [2021-06-05 07:09:48,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476339484] [2021-06-05 07:09:48,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 07:09:48,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:48,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 07:09:48,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1774, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:09:48,590 INFO L87 Difference]: Start difference. First operand 666 states and 1356 transitions. Second operand has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 43 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) [2021-06-05 07:09:50,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:50,497 INFO L93 Difference]: Finished difference Result 1008 states and 1996 transitions. [2021-06-05 07:09:50,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:09:50,497 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 43 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 39 [2021-06-05 07:09:50,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:50,498 INFO L225 Difference]: With dead ends: 1008 [2021-06-05 07:09:50,498 INFO L226 Difference]: Without dead ends: 957 [2021-06-05 07:09:50,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 1971.1ms TimeCoverageRelationStatistics Valid=259, Invalid=4163, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 07:09:50,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-06-05 07:09:50,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 663. [2021-06-05 07:09:50,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.040785498489426) internal successors, (1351), 662 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:50,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1351 transitions. [2021-06-05 07:09:50,504 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1351 transitions. Word has length 39 [2021-06-05 07:09:50,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:50,504 INFO L482 AbstractCegarLoop]: Abstraction has 663 states and 1351 transitions. [2021-06-05 07:09:50,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 43 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) [2021-06-05 07:09:50,504 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1351 transitions. [2021-06-05 07:09:50,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:09:50,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:50,505 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:50,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:50,707 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:50,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:50,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1197333957, now seen corresponding path program 371 times [2021-06-05 07:09:50,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:50,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928793061] [2021-06-05 07:09:50,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:50,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:51,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:51,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928793061] [2021-06-05 07:09:51,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928793061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:51,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425044349] [2021-06-05 07:09:51,214 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 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 [2021-06-05 07:09:51,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:09:51,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:51,241 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 07:09:51,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:51,816 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 07:09:51,816 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 25 treesize of output 13 [2021-06-05 07:09:51,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:51,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:51,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:51,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 07:09:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:52,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425044349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:52,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:52,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 47 [2021-06-05 07:09:52,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694555981] [2021-06-05 07:09:52,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 07:09:52,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:52,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 07:09:52,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2112, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:09:52,182 INFO L87 Difference]: Start difference. First operand 663 states and 1351 transitions. Second operand has 48 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 47 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) [2021-06-05 07:09:54,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:54,274 INFO L93 Difference]: Finished difference Result 932 states and 1869 transitions. [2021-06-05 07:09:54,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:09:54,274 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 47 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 39 [2021-06-05 07:09:54,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:54,275 INFO L225 Difference]: With dead ends: 932 [2021-06-05 07:09:54,275 INFO L226 Difference]: Without dead ends: 925 [2021-06-05 07:09:54,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 2154.6ms TimeCoverageRelationStatistics Valid=303, Invalid=4953, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 07:09:54,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-06-05 07:09:54,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 663. [2021-06-05 07:09:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.040785498489426) internal successors, (1351), 662 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:54,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1351 transitions. [2021-06-05 07:09:54,285 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1351 transitions. Word has length 39 [2021-06-05 07:09:54,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:54,286 INFO L482 AbstractCegarLoop]: Abstraction has 663 states and 1351 transitions. [2021-06-05 07:09:54,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 47 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) [2021-06-05 07:09:54,286 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1351 transitions. [2021-06-05 07:09:54,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:09:54,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:54,286 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:54,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:09:54,493 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:54,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:54,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1360183831, now seen corresponding path program 372 times [2021-06-05 07:09:54,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:54,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933511981] [2021-06-05 07:09:54,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:54,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:54,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933511981] [2021-06-05 07:09:54,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933511981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:54,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156187467] [2021-06-05 07:09:54,973 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 [2021-06-05 07:09:55,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:09:55,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:09:55,000 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 07:09:55,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:55,406 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 07:09:55,406 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 25 treesize of output 13 [2021-06-05 07:09:55,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:55,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:55,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:55,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 07:09:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:55,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156187467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:55,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:55,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 07:09:55,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197795634] [2021-06-05 07:09:55,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 07:09:55,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:55,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 07:09:55,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1691, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:09:55,733 INFO L87 Difference]: Start difference. First operand 663 states and 1351 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:57,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:09:57,596 INFO L93 Difference]: Finished difference Result 937 states and 1870 transitions. [2021-06-05 07:09:57,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:09:57,597 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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 39 [2021-06-05 07:09:57,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:09:57,597 INFO L225 Difference]: With dead ends: 937 [2021-06-05 07:09:57,597 INFO L226 Difference]: Without dead ends: 928 [2021-06-05 07:09:57,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1499.0ms TimeCoverageRelationStatistics Valid=196, Invalid=2884, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:09:57,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-06-05 07:09:57,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 690. [2021-06-05 07:09:57,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 2.0537010159651667) internal successors, (1415), 689 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:57,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1415 transitions. [2021-06-05 07:09:57,604 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1415 transitions. Word has length 39 [2021-06-05 07:09:57,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:09:57,604 INFO L482 AbstractCegarLoop]: Abstraction has 690 states and 1415 transitions. [2021-06-05 07:09:57,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:09:57,604 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1415 transitions. [2021-06-05 07:09:57,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:09:57,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:09:57,605 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:09:57,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2021-06-05 07:09:57,805 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:09:57,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:09:57,805 INFO L82 PathProgramCache]: Analyzing trace with hash -478118107, now seen corresponding path program 373 times [2021-06-05 07:09:57,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:09:57,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013037587] [2021-06-05 07:09:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:09:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:58,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:09:58,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013037587] [2021-06-05 07:09:58,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013037587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:58,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175581743] [2021-06-05 07:09:58,271 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 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 [2021-06-05 07:09:58,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:09:58,306 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:09:58,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:09:58,711 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 07:09:58,711 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 25 treesize of output 13 [2021-06-05 07:09:58,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:09:58,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:09:58,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:09:58,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 07:09:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:09:59,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175581743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:09:59,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:09:59,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 07:09:59,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636873804] [2021-06-05 07:09:59,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 07:09:59,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:09:59,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 07:09:59,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1693, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:09:59,045 INFO L87 Difference]: Start difference. First operand 690 states and 1415 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:01,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:01,566 INFO L93 Difference]: Finished difference Result 938 states and 1879 transitions. [2021-06-05 07:10:01,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 07:10:01,567 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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 39 [2021-06-05 07:10:01,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:01,567 INFO L225 Difference]: With dead ends: 938 [2021-06-05 07:10:01,567 INFO L226 Difference]: Without dead ends: 923 [2021-06-05 07:10:01,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1770.7ms TimeCoverageRelationStatistics Valid=246, Invalid=3660, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 07:10:01,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-06-05 07:10:01,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 688. [2021-06-05 07:10:01,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 2.053857350800582) internal successors, (1411), 687 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:01,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 1411 transitions. [2021-06-05 07:10:01,574 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 1411 transitions. Word has length 39 [2021-06-05 07:10:01,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:01,574 INFO L482 AbstractCegarLoop]: Abstraction has 688 states and 1411 transitions. [2021-06-05 07:10:01,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:01,574 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 1411 transitions. [2021-06-05 07:10:01,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:10:01,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:01,574 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:10:01,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:01,775 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:01,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:01,775 INFO L82 PathProgramCache]: Analyzing trace with hash 990548611, now seen corresponding path program 374 times [2021-06-05 07:10:01,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:01,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788526237] [2021-06-05 07:10:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:02,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:02,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788526237] [2021-06-05 07:10:02,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788526237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:02,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660514881] [2021-06-05 07:10:02,235 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 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 [2021-06-05 07:10:02,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:10:02,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:02,262 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 07:10:02,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:02,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:02,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:02,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 07:10:02,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:02,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:02,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:02,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:23 [2021-06-05 07:10:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:03,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660514881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:03,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:03,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-06-05 07:10:03,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351591618] [2021-06-05 07:10:03,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 07:10:03,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:03,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 07:10:03,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1609, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:10:03,010 INFO L87 Difference]: Start difference. First operand 688 states and 1411 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:06,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:06,024 INFO L93 Difference]: Finished difference Result 986 states and 1968 transitions. [2021-06-05 07:10:06,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 07:10:06,024 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 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 39 [2021-06-05 07:10:06,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:06,025 INFO L225 Difference]: With dead ends: 986 [2021-06-05 07:10:06,025 INFO L226 Difference]: Without dead ends: 969 [2021-06-05 07:10:06,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 2076.5ms TimeCoverageRelationStatistics Valid=293, Invalid=4399, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 07:10:06,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-06-05 07:10:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 697. [2021-06-05 07:10:06,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 2.050287356321839) internal successors, (1427), 696 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:06,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1427 transitions. [2021-06-05 07:10:06,032 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1427 transitions. Word has length 39 [2021-06-05 07:10:06,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:06,032 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 1427 transitions. [2021-06-05 07:10:06,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 41 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:06,032 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1427 transitions. [2021-06-05 07:10:06,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:10:06,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:06,032 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:10:06,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable386,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:06,241 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:06,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:06,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1785379887, now seen corresponding path program 375 times [2021-06-05 07:10:06,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:06,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579576515] [2021-06-05 07:10:06,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:06,761 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:06,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:06,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579576515] [2021-06-05 07:10:06,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579576515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:06,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039022545] [2021-06-05 07:10:06,762 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 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 [2021-06-05 07:10:06,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:10:06,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:06,790 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 07:10:06,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:07,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:07,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:07,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:07,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 07:10:07,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:07,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:07,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:07,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:23 [2021-06-05 07:10:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:07,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039022545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:07,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:07,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2021-06-05 07:10:07,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168806253] [2021-06-05 07:10:07,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 07:10:07,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:07,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 07:10:07,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1772, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 07:10:07,637 INFO L87 Difference]: Start difference. First operand 697 states and 1427 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:11,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:11,619 INFO L93 Difference]: Finished difference Result 1317 states and 2632 transitions. [2021-06-05 07:10:11,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 07:10:11,619 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 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 39 [2021-06-05 07:10:11,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:11,620 INFO L225 Difference]: With dead ends: 1317 [2021-06-05 07:10:11,620 INFO L226 Difference]: Without dead ends: 1273 [2021-06-05 07:10:11,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2232 ImplicationChecksByTransitivity, 3299.3ms TimeCoverageRelationStatistics Valid=493, Invalid=8063, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 07:10:11,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-06-05 07:10:11,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 690. [2021-06-05 07:10:11,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 2.043541364296081) internal successors, (1408), 689 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:11,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1408 transitions. [2021-06-05 07:10:11,627 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1408 transitions. Word has length 39 [2021-06-05 07:10:11,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:11,627 INFO L482 AbstractCegarLoop]: Abstraction has 690 states and 1408 transitions. [2021-06-05 07:10:11,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:11,627 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1408 transitions. [2021-06-05 07:10:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:10:11,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:11,628 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:10:11,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 07:10:11,828 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:11,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:11,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1879167001, now seen corresponding path program 376 times [2021-06-05 07:10:11,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:11,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457627350] [2021-06-05 07:10:11,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:12,339 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:12,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:12,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457627350] [2021-06-05 07:10:12,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457627350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:12,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955194250] [2021-06-05 07:10:12,339 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 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 [2021-06-05 07:10:12,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:10:12,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:12,365 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:10:12,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:12,783 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 07:10:12,783 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 25 treesize of output 13 [2021-06-05 07:10:12,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:12,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:12,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:12,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 07:10:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:13,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955194250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:13,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:13,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 07:10:13,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039917484] [2021-06-05 07:10:13,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 07:10:13,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:13,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 07:10:13,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1691, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:10:13,112 INFO L87 Difference]: Start difference. First operand 690 states and 1408 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:14,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:14,685 INFO L93 Difference]: Finished difference Result 849 states and 1702 transitions. [2021-06-05 07:10:14,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:10:14,685 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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 39 [2021-06-05 07:10:14,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:14,686 INFO L225 Difference]: With dead ends: 849 [2021-06-05 07:10:14,686 INFO L226 Difference]: Without dead ends: 840 [2021-06-05 07:10:14,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1546.8ms TimeCoverageRelationStatistics Valid=187, Invalid=2783, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:10:14,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-06-05 07:10:14,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 692. [2021-06-05 07:10:14,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 2.0419681620839363) internal successors, (1411), 691 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:14,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1411 transitions. [2021-06-05 07:10:14,692 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1411 transitions. Word has length 39 [2021-06-05 07:10:14,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:14,692 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 1411 transitions. [2021-06-05 07:10:14,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:14,692 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1411 transitions. [2021-06-05 07:10:14,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:10:14,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:14,693 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:10:14,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 07:10:14,893 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:14,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:14,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1533734571, now seen corresponding path program 377 times [2021-06-05 07:10:14,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:14,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138550158] [2021-06-05 07:10:14,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:15,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:15,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138550158] [2021-06-05 07:10:15,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138550158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:15,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23068916] [2021-06-05 07:10:15,492 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 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 [2021-06-05 07:10:15,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:10:15,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:15,530 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:10:15,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:15,935 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 07:10:15,935 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 29 treesize of output 13 [2021-06-05 07:10:15,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:15,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:15,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:15,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 07:10:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:16,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23068916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:16,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:16,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 07:10:16,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657019076] [2021-06-05 07:10:16,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 07:10:16,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:16,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 07:10:16,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1692, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:10:16,273 INFO L87 Difference]: Start difference. First operand 692 states and 1411 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:18,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:18,184 INFO L93 Difference]: Finished difference Result 838 states and 1688 transitions. [2021-06-05 07:10:18,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:10:18,185 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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 39 [2021-06-05 07:10:18,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:18,185 INFO L225 Difference]: With dead ends: 838 [2021-06-05 07:10:18,185 INFO L226 Difference]: Without dead ends: 815 [2021-06-05 07:10:18,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1752.1ms TimeCoverageRelationStatistics Valid=205, Invalid=3101, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:10:18,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2021-06-05 07:10:18,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 682. [2021-06-05 07:10:18,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 2.0499265785609397) internal successors, (1396), 681 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1396 transitions. [2021-06-05 07:10:18,191 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1396 transitions. Word has length 39 [2021-06-05 07:10:18,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:18,191 INFO L482 AbstractCegarLoop]: Abstraction has 682 states and 1396 transitions. [2021-06-05 07:10:18,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:18,191 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1396 transitions. [2021-06-05 07:10:18,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:10:18,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:18,191 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:10:18,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 07:10:18,392 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:18,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:18,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1883225075, now seen corresponding path program 378 times [2021-06-05 07:10:18,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:18,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722326985] [2021-06-05 07:10:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:18,852 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:18,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:18,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722326985] [2021-06-05 07:10:18,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722326985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:18,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016582826] [2021-06-05 07:10:18,853 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 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 [2021-06-05 07:10:18,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:10:18,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:18,882 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:10:18,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:19,289 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 07:10:19,289 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 29 treesize of output 13 [2021-06-05 07:10:19,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:19,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:19,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:19,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 07:10:19,644 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:19,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016582826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:19,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:19,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 07:10:19,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902932065] [2021-06-05 07:10:19,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 07:10:19,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:19,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 07:10:19,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1691, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:10:19,645 INFO L87 Difference]: Start difference. First operand 682 states and 1396 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:22,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:22,338 INFO L93 Difference]: Finished difference Result 1130 states and 2281 transitions. [2021-06-05 07:10:22,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 07:10:22,338 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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 39 [2021-06-05 07:10:22,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:22,339 INFO L225 Difference]: With dead ends: 1130 [2021-06-05 07:10:22,339 INFO L226 Difference]: Without dead ends: 1097 [2021-06-05 07:10:22,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 2365.7ms TimeCoverageRelationStatistics Valid=327, Invalid=5223, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 07:10:22,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-06-05 07:10:22,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 680. [2021-06-05 07:10:22,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 2.051546391752577) internal successors, (1393), 679 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:22,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1393 transitions. [2021-06-05 07:10:22,345 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1393 transitions. Word has length 39 [2021-06-05 07:10:22,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:22,345 INFO L482 AbstractCegarLoop]: Abstraction has 680 states and 1393 transitions. [2021-06-05 07:10:22,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:22,345 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1393 transitions. [2021-06-05 07:10:22,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:10:22,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:22,346 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:10:22,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:22,546 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:22,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:22,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1925604717, now seen corresponding path program 379 times [2021-06-05 07:10:22,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:22,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450507366] [2021-06-05 07:10:22,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:23,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:23,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450507366] [2021-06-05 07:10:23,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450507366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:23,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638640320] [2021-06-05 07:10:23,009 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 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 [2021-06-05 07:10:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:23,036 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:10:23,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:23,445 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 07:10:23,445 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 25 treesize of output 13 [2021-06-05 07:10:23,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:23,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:23,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:23,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 07:10:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:23,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638640320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:23,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:23,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 07:10:23,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930125914] [2021-06-05 07:10:23,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 07:10:23,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:23,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 07:10:23,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1690, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:10:23,786 INFO L87 Difference]: Start difference. First operand 680 states and 1393 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:25,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:25,526 INFO L93 Difference]: Finished difference Result 858 states and 1720 transitions. [2021-06-05 07:10:25,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 07:10:25,527 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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 39 [2021-06-05 07:10:25,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:25,527 INFO L225 Difference]: With dead ends: 858 [2021-06-05 07:10:25,527 INFO L226 Difference]: Without dead ends: 849 [2021-06-05 07:10:25,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1527.9ms TimeCoverageRelationStatistics Valid=198, Invalid=2882, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:10:25,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-06-05 07:10:25,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 700. [2021-06-05 07:10:25,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 2.0472103004291844) internal successors, (1431), 699 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:25,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1431 transitions. [2021-06-05 07:10:25,533 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1431 transitions. Word has length 39 [2021-06-05 07:10:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:25,533 INFO L482 AbstractCegarLoop]: Abstraction has 700 states and 1431 transitions. [2021-06-05 07:10:25,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1431 transitions. [2021-06-05 07:10:25,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:10:25,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:25,534 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:10:25,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable391 [2021-06-05 07:10:25,734 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:25,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:25,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1043538993, now seen corresponding path program 380 times [2021-06-05 07:10:25,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:25,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363187355] [2021-06-05 07:10:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:26,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:26,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363187355] [2021-06-05 07:10:26,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363187355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:26,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105414068] [2021-06-05 07:10:26,228 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 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 [2021-06-05 07:10:26,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:10:26,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:26,254 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:10:26,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:26,660 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 07:10:26,660 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 25 treesize of output 13 [2021-06-05 07:10:26,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:26,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:26,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:26,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 07:10:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:26,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105414068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:26,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:26,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 07:10:26,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329271224] [2021-06-05 07:10:26,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 07:10:26,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:26,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 07:10:26,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1691, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:10:26,994 INFO L87 Difference]: Start difference. First operand 700 states and 1431 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:29,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:29,007 INFO L93 Difference]: Finished difference Result 847 states and 1706 transitions. [2021-06-05 07:10:29,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:10:29,007 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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 39 [2021-06-05 07:10:29,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:29,008 INFO L225 Difference]: With dead ends: 847 [2021-06-05 07:10:29,008 INFO L226 Difference]: Without dead ends: 832 [2021-06-05 07:10:29,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1659.9ms TimeCoverageRelationStatistics Valid=216, Invalid=3206, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:10:29,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-06-05 07:10:29,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 698. [2021-06-05 07:10:29,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 2.047345767575323) internal successors, (1427), 697 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1427 transitions. [2021-06-05 07:10:29,014 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1427 transitions. Word has length 39 [2021-06-05 07:10:29,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:29,014 INFO L482 AbstractCegarLoop]: Abstraction has 698 states and 1427 transitions. [2021-06-05 07:10:29,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:29,014 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1427 transitions. [2021-06-05 07:10:29,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:10:29,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:29,015 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:10:29,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:29,215 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:29,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:29,215 INFO L82 PathProgramCache]: Analyzing trace with hash 425127725, now seen corresponding path program 381 times [2021-06-05 07:10:29,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:29,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217378705] [2021-06-05 07:10:29,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:29,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:29,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217378705] [2021-06-05 07:10:29,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217378705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:29,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768216101] [2021-06-05 07:10:29,724 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 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 [2021-06-05 07:10:29,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:10:29,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:29,750 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:10:29,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:30,132 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 07:10:30,132 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 25 treesize of output 13 [2021-06-05 07:10:30,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:30,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:30,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:30,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 07:10:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:30,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768216101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:30,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:30,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 40 [2021-06-05 07:10:30,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040297386] [2021-06-05 07:10:30,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 07:10:30,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:30,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 07:10:30,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:10:30,409 INFO L87 Difference]: Start difference. First operand 698 states and 1427 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:32,190 INFO L93 Difference]: Finished difference Result 848 states and 1707 transitions. [2021-06-05 07:10:32,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:10:32,190 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 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 39 [2021-06-05 07:10:32,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:32,190 INFO L225 Difference]: With dead ends: 848 [2021-06-05 07:10:32,191 INFO L226 Difference]: Without dead ends: 812 [2021-06-05 07:10:32,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1546.5ms TimeCoverageRelationStatistics Valid=208, Invalid=2872, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:10:32,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-05 07:10:32,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 690. [2021-06-05 07:10:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 2.0478955007256894) internal successors, (1411), 689 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:32,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1411 transitions. [2021-06-05 07:10:32,196 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1411 transitions. Word has length 39 [2021-06-05 07:10:32,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:32,196 INFO L482 AbstractCegarLoop]: Abstraction has 690 states and 1411 transitions. [2021-06-05 07:10:32,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:32,196 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1411 transitions. [2021-06-05 07:10:32,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:10:32,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:32,197 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:10:32,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:32,397 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:32,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:32,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1921546643, now seen corresponding path program 382 times [2021-06-05 07:10:32,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:32,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804738095] [2021-06-05 07:10:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:32,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:32,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804738095] [2021-06-05 07:10:32,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804738095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:32,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994653349] [2021-06-05 07:10:32,862 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 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 [2021-06-05 07:10:32,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:10:32,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:32,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:10:32,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:33,299 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 07:10:33,299 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 25 treesize of output 13 [2021-06-05 07:10:33,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:33,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:33,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:33,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 07:10:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:33,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994653349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:33,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:33,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 07:10:33,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111551019] [2021-06-05 07:10:33,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 07:10:33,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:33,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 07:10:33,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1690, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:10:33,628 INFO L87 Difference]: Start difference. First operand 690 states and 1411 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:36,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:36,535 INFO L93 Difference]: Finished difference Result 1100 states and 2218 transitions. [2021-06-05 07:10:36,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:10:36,535 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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 39 [2021-06-05 07:10:36,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:36,536 INFO L225 Difference]: With dead ends: 1100 [2021-06-05 07:10:36,536 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 07:10:36,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 2274.4ms TimeCoverageRelationStatistics Valid=329, Invalid=5073, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 07:10:36,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 07:10:36,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 688. [2021-06-05 07:10:36,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 2.0480349344978164) internal successors, (1407), 687 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:36,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 1407 transitions. [2021-06-05 07:10:36,543 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 1407 transitions. Word has length 39 [2021-06-05 07:10:36,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:36,543 INFO L482 AbstractCegarLoop]: Abstraction has 688 states and 1407 transitions. [2021-06-05 07:10:36,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:36,543 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 1407 transitions. [2021-06-05 07:10:36,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:10:36,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:36,544 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:10:36,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:36,744 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:36,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:36,745 INFO L82 PathProgramCache]: Analyzing trace with hash 33911913, now seen corresponding path program 383 times [2021-06-05 07:10:36,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:36,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918684134] [2021-06-05 07:10:36,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:37,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:37,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918684134] [2021-06-05 07:10:37,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918684134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:37,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769509267] [2021-06-05 07:10:37,295 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 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 [2021-06-05 07:10:37,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:10:37,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:37,322 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 07:10:37,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:37,901 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 07:10:37,901 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 29 treesize of output 13 [2021-06-05 07:10:37,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:37,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:37,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:37,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 07:10:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:38,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769509267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:38,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:38,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 48 [2021-06-05 07:10:38,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738204448] [2021-06-05 07:10:38,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 07:10:38,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:38,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 07:10:38,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2205, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:10:38,354 INFO L87 Difference]: Start difference. First operand 688 states and 1407 transitions. Second operand has 49 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 48 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:41,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:41,532 INFO L93 Difference]: Finished difference Result 1151 states and 2308 transitions. [2021-06-05 07:10:41,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 07:10:41,533 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 48 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 39 [2021-06-05 07:10:41,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:41,534 INFO L225 Difference]: With dead ends: 1151 [2021-06-05 07:10:41,534 INFO L226 Difference]: Without dead ends: 1079 [2021-06-05 07:10:41,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1827 ImplicationChecksByTransitivity, 2764.1ms TimeCoverageRelationStatistics Valid=395, Invalid=6577, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 07:10:41,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-06-05 07:10:41,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 700. [2021-06-05 07:10:41,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 2.028612303290415) internal successors, (1418), 699 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:41,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1418 transitions. [2021-06-05 07:10:41,540 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1418 transitions. Word has length 39 [2021-06-05 07:10:41,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:41,540 INFO L482 AbstractCegarLoop]: Abstraction has 700 states and 1418 transitions. [2021-06-05 07:10:41,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 48 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:41,540 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1418 transitions. [2021-06-05 07:10:41,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:10:41,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:41,541 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:10:41,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:41,741 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:41,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:41,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1779133037, now seen corresponding path program 384 times [2021-06-05 07:10:41,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:41,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921518979] [2021-06-05 07:10:41,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:42,201 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:42,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:42,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921518979] [2021-06-05 07:10:42,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921518979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:42,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30464158] [2021-06-05 07:10:42,202 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 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 [2021-06-05 07:10:42,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:10:42,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:42,227 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:10:42,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:42,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:42,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:10:42,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:10:42,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 07:10:42,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:42,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:42,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:42,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:18 [2021-06-05 07:10:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:43,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30464158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:43,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:43,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2021-06-05 07:10:43,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257740926] [2021-06-05 07:10:43,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 07:10:43,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:43,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 07:10:43,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2126, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:10:43,240 INFO L87 Difference]: Start difference. First operand 700 states and 1418 transitions. Second operand has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:45,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:45,539 INFO L93 Difference]: Finished difference Result 883 states and 1735 transitions. [2021-06-05 07:10:45,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 07:10:45,539 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 07:10:45,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:45,540 INFO L225 Difference]: With dead ends: 883 [2021-06-05 07:10:45,540 INFO L226 Difference]: Without dead ends: 865 [2021-06-05 07:10:45,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 2266.4ms TimeCoverageRelationStatistics Valid=288, Invalid=4682, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 07:10:45,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-06-05 07:10:45,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 724. [2021-06-05 07:10:45,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.0262793914246195) internal successors, (1465), 723 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:45,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1465 transitions. [2021-06-05 07:10:45,547 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1465 transitions. Word has length 39 [2021-06-05 07:10:45,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:45,547 INFO L482 AbstractCegarLoop]: Abstraction has 724 states and 1465 transitions. [2021-06-05 07:10:45,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:45,547 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1465 transitions. [2021-06-05 07:10:45,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:10:45,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:45,548 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:10:45,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:10:45,748 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:45,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:45,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1633768535, now seen corresponding path program 385 times [2021-06-05 07:10:45,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:45,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568970928] [2021-06-05 07:10:45,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:46,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:46,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568970928] [2021-06-05 07:10:46,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568970928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:46,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481772268] [2021-06-05 07:10:46,309 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 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 [2021-06-05 07:10:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:46,335 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:10:46,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:46,791 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 07:10:46,791 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 25 treesize of output 13 [2021-06-05 07:10:46,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:46,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:46,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:46,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 07:10:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:47,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481772268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:47,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:47,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 07:10:47,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957728353] [2021-06-05 07:10:47,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 07:10:47,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:47,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 07:10:47,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1692, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:10:47,106 INFO L87 Difference]: Start difference. First operand 724 states and 1465 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:48,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:48,727 INFO L93 Difference]: Finished difference Result 785 states and 1580 transitions. [2021-06-05 07:10:48,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:10:48,727 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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 39 [2021-06-05 07:10:48,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:48,728 INFO L225 Difference]: With dead ends: 785 [2021-06-05 07:10:48,728 INFO L226 Difference]: Without dead ends: 752 [2021-06-05 07:10:48,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1688.0ms TimeCoverageRelationStatistics Valid=194, Invalid=2886, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:10:48,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-06-05 07:10:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 706. [2021-06-05 07:10:48,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 2.0397163120567376) internal successors, (1438), 705 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:48,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1438 transitions. [2021-06-05 07:10:48,733 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1438 transitions. Word has length 39 [2021-06-05 07:10:48,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:48,733 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 1438 transitions. [2021-06-05 07:10:48,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:48,733 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1438 transitions. [2021-06-05 07:10:48,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:10:48,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:48,734 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:10:48,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-06-05 07:10:48,934 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:48,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:48,934 INFO L82 PathProgramCache]: Analyzing trace with hash -906682237, now seen corresponding path program 386 times [2021-06-05 07:10:48,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:48,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101055681] [2021-06-05 07:10:48,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:49,438 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:49,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:49,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101055681] [2021-06-05 07:10:49,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101055681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:49,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264869886] [2021-06-05 07:10:49,438 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 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 [2021-06-05 07:10:49,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:10:49,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:49,465 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:10:49,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:49,909 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 07:10:49,909 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 29 treesize of output 13 [2021-06-05 07:10:49,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:49,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:49,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:49,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 07:10:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:50,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264869886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:50,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:50,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 07:10:50,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336060043] [2021-06-05 07:10:50,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 07:10:50,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:50,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 07:10:50,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1691, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:10:50,209 INFO L87 Difference]: Start difference. First operand 706 states and 1438 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:52,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:52,474 INFO L93 Difference]: Finished difference Result 1019 states and 2047 transitions. [2021-06-05 07:10:52,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:10:52,474 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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 39 [2021-06-05 07:10:52,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:52,475 INFO L225 Difference]: With dead ends: 1019 [2021-06-05 07:10:52,475 INFO L226 Difference]: Without dead ends: 971 [2021-06-05 07:10:52,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 2074.8ms TimeCoverageRelationStatistics Valid=273, Invalid=4149, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 07:10:52,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-06-05 07:10:52,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 704. [2021-06-05 07:10:52,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 2.0412517780938835) internal successors, (1435), 703 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:52,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1435 transitions. [2021-06-05 07:10:52,481 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1435 transitions. Word has length 39 [2021-06-05 07:10:52,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:52,481 INFO L482 AbstractCegarLoop]: Abstraction has 704 states and 1435 transitions. [2021-06-05 07:10:52,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:52,481 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1435 transitions. [2021-06-05 07:10:52,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:10:52,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:52,482 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:10:52,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 07:10:52,682 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:52,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:52,682 INFO L82 PathProgramCache]: Analyzing trace with hash 2052135987, now seen corresponding path program 387 times [2021-06-05 07:10:52,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:52,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043286330] [2021-06-05 07:10:52,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:53,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:53,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043286330] [2021-06-05 07:10:53,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043286330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:53,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778189478] [2021-06-05 07:10:53,149 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 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 [2021-06-05 07:10:53,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:10:53,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:53,176 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 07:10:53,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:53,620 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 07:10:53,620 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 25 treesize of output 13 [2021-06-05 07:10:53,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:53,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:53,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:53,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 07:10:53,918 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:53,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778189478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:53,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:53,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 07:10:53,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312404521] [2021-06-05 07:10:53,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 07:10:53,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:53,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 07:10:53,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1690, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:10:53,919 INFO L87 Difference]: Start difference. First operand 704 states and 1435 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:55,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:55,122 INFO L93 Difference]: Finished difference Result 813 states and 1631 transitions. [2021-06-05 07:10:55,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:10:55,122 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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 39 [2021-06-05 07:10:55,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:55,123 INFO L225 Difference]: With dead ends: 813 [2021-06-05 07:10:55,123 INFO L226 Difference]: Without dead ends: 804 [2021-06-05 07:10:55,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1374.9ms TimeCoverageRelationStatistics Valid=171, Invalid=2481, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 07:10:55,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-06-05 07:10:55,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 707. [2021-06-05 07:10:55,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 2.0424929178470257) internal successors, (1442), 706 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:55,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1442 transitions. [2021-06-05 07:10:55,129 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1442 transitions. Word has length 39 [2021-06-05 07:10:55,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:55,129 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 1442 transitions. [2021-06-05 07:10:55,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:55,129 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1442 transitions. [2021-06-05 07:10:55,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:10:55,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:55,129 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:10:55,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 07:10:55,333 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:55,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1360765585, now seen corresponding path program 388 times [2021-06-05 07:10:55,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:55,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766878949] [2021-06-05 07:10:55,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:55,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:55,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766878949] [2021-06-05 07:10:55,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766878949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:55,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028081382] [2021-06-05 07:10:55,813 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 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 [2021-06-05 07:10:55,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:10:55,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:55,838 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:10:55,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:56,281 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 07:10:56,282 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 25 treesize of output 13 [2021-06-05 07:10:56,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:56,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:56,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:56,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 07:10:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:56,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028081382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:56,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:56,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 07:10:56,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657365753] [2021-06-05 07:10:56,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 07:10:56,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:56,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 07:10:56,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1691, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:10:56,583 INFO L87 Difference]: Start difference. First operand 707 states and 1442 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:58,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:10:58,098 INFO L93 Difference]: Finished difference Result 802 states and 1617 transitions. [2021-06-05 07:10:58,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:10:58,099 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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 39 [2021-06-05 07:10:58,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:10:58,099 INFO L225 Difference]: With dead ends: 802 [2021-06-05 07:10:58,099 INFO L226 Difference]: Without dead ends: 787 [2021-06-05 07:10:58,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1507.3ms TimeCoverageRelationStatistics Valid=189, Invalid=2781, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:10:58,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-06-05 07:10:58,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 727. [2021-06-05 07:10:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 2.038567493112948) internal successors, (1480), 726 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:58,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1480 transitions. [2021-06-05 07:10:58,109 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1480 transitions. Word has length 39 [2021-06-05 07:10:58,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:10:58,109 INFO L482 AbstractCegarLoop]: Abstraction has 727 states and 1480 transitions. [2021-06-05 07:10:58,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:10:58,110 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1480 transitions. [2021-06-05 07:10:58,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:10:58,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:10:58,110 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:10:58,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 07:10:58,311 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:10:58,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:10:58,311 INFO L82 PathProgramCache]: Analyzing trace with hash 107901133, now seen corresponding path program 389 times [2021-06-05 07:10:58,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:10:58,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136462732] [2021-06-05 07:10:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:10:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:10:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:58,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:10:58,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136462732] [2021-06-05 07:10:58,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136462732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:58,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352717133] [2021-06-05 07:10:58,777 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 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 [2021-06-05 07:10:58,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:10:58,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:10:58,803 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:10:58,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:10:59,228 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 07:10:59,229 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 25 treesize of output 13 [2021-06-05 07:10:59,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:10:59,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:10:59,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:10:59,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 07:10:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:10:59,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352717133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:10:59,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:10:59,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 42 [2021-06-05 07:10:59,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692395121] [2021-06-05 07:10:59,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 07:10:59,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:10:59,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 07:10:59,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1680, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:10:59,544 INFO L87 Difference]: Start difference. First operand 727 states and 1480 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:01,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:01,082 INFO L93 Difference]: Finished difference Result 803 states and 1618 transitions. [2021-06-05 07:11:01,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:11:01,082 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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 39 [2021-06-05 07:11:01,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:01,082 INFO L225 Difference]: With dead ends: 803 [2021-06-05 07:11:01,083 INFO L226 Difference]: Without dead ends: 786 [2021-06-05 07:11:01,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1444.0ms TimeCoverageRelationStatistics Valid=199, Invalid=2663, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:11:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-06-05 07:11:01,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 726. [2021-06-05 07:11:01,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 2.0386206896551724) internal successors, (1478), 725 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1478 transitions. [2021-06-05 07:11:01,088 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1478 transitions. Word has length 39 [2021-06-05 07:11:01,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:01,088 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 1478 transitions. [2021-06-05 07:11:01,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:01,088 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1478 transitions. [2021-06-05 07:11:01,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:11:01,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:01,089 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:01,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 07:11:01,289 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:01,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:01,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1626939931, now seen corresponding path program 390 times [2021-06-05 07:11:01,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:01,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526507739] [2021-06-05 07:11:01,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:01,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:01,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526507739] [2021-06-05 07:11:01,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526507739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:01,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423409014] [2021-06-05 07:11:01,754 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 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 [2021-06-05 07:11:01,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:11:01,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:01,780 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 07:11:01,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:02,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:02,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:11:02,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:11:02,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 07:11:02,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:02,338 INFO L628 ElimStorePlain]: treesize reduction 5, result has 87.8 percent of original size [2021-06-05 07:11:02,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:11:02,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:57, output treesize:23 [2021-06-05 07:11:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:02,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423409014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:02,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:02,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 45 [2021-06-05 07:11:02,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127112999] [2021-06-05 07:11:02,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 07:11:02,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:02,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 07:11:02,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1932, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:11:02,790 INFO L87 Difference]: Start difference. First operand 726 states and 1478 transitions. Second operand has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 45 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:06,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:06,220 INFO L93 Difference]: Finished difference Result 1056 states and 2105 transitions. [2021-06-05 07:11:06,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 07:11:06,221 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 45 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 39 [2021-06-05 07:11:06,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:06,222 INFO L225 Difference]: With dead ends: 1056 [2021-06-05 07:11:06,222 INFO L226 Difference]: Without dead ends: 980 [2021-06-05 07:11:06,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 2749.0ms TimeCoverageRelationStatistics Valid=393, Invalid=6087, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 07:11:06,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-06-05 07:11:06,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 719. [2021-06-05 07:11:06,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.0389972144846795) internal successors, (1464), 718 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:06,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1464 transitions. [2021-06-05 07:11:06,228 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1464 transitions. Word has length 39 [2021-06-05 07:11:06,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:06,228 INFO L482 AbstractCegarLoop]: Abstraction has 719 states and 1464 transitions. [2021-06-05 07:11:06,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 45 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:06,228 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1464 transitions. [2021-06-05 07:11:06,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:11:06,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:06,229 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:06,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:06,429 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:06,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:06,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2056194061, now seen corresponding path program 391 times [2021-06-05 07:11:06,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:06,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270756336] [2021-06-05 07:11:06,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:06,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:06,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270756336] [2021-06-05 07:11:06,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270756336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:06,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293273045] [2021-06-05 07:11:06,891 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 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 [2021-06-05 07:11:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:06,916 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:11:06,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:07,390 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 07:11:07,390 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 25 treesize of output 13 [2021-06-05 07:11:07,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:07,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:11:07,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:11:07,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 07:11:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:07,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293273045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:07,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:07,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-06-05 07:11:07,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476994935] [2021-06-05 07:11:07,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 07:11:07,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:07,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 07:11:07,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1690, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:11:07,683 INFO L87 Difference]: Start difference. First operand 719 states and 1464 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:09,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:11:09,620 INFO L93 Difference]: Finished difference Result 1000 states and 2010 transitions. [2021-06-05 07:11:09,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:11:09,620 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 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 39 [2021-06-05 07:11:09,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:11:09,621 INFO L225 Difference]: With dead ends: 1000 [2021-06-05 07:11:09,621 INFO L226 Difference]: Without dead ends: 967 [2021-06-05 07:11:09,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1944.4ms TimeCoverageRelationStatistics Valid=257, Invalid=3903, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 07:11:09,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-06-05 07:11:09,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 717. [2021-06-05 07:11:09,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 2.0391061452513966) internal successors, (1460), 716 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1460 transitions. [2021-06-05 07:11:09,627 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1460 transitions. Word has length 39 [2021-06-05 07:11:09,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:11:09,627 INFO L482 AbstractCegarLoop]: Abstraction has 717 states and 1460 transitions. [2021-06-05 07:11:09,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:11:09,628 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1460 transitions. [2021-06-05 07:11:09,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:11:09,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:11:09,628 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:11:09,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-05 07:11:09,829 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:11:09,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:11:09,829 INFO L82 PathProgramCache]: Analyzing trace with hash -283314679, now seen corresponding path program 392 times [2021-06-05 07:11:09,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:11:09,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19494090] [2021-06-05 07:11:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:11:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:11:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:10,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:11:10,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19494090] [2021-06-05 07:11:10,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19494090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:10,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112657237] [2021-06-05 07:11:10,295 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 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 [2021-06-05 07:11:10,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:11:10,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:11:10,320 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:11:10,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:11:10,773 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 07:11:10,773 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 25 treesize of output 13 [2021-06-05 07:11:10,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:11:10,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:11:10,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:11:10,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 07:11:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:11:11,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112657237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:11:11,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:11:11,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 44 [2021-06-05 07:11:11,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548615432] [2021-06-05 07:11:11,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 07:11:11,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:11:11,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 07:11:11,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1858, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:11:11,105 INFO L87 Difference]: Start difference. First operand 717 states and 1460 transitions. Second operand has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 44 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) Received shutdown request... [2021-06-05 07:11:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 07:11:11,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:11:11,349 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 07:11:11,354 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 07:11:11,358 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 07:11:11,359 INFO L202 PluginConnector]: Adding new model queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 07:11:11 BasicIcfg [2021-06-05 07:11:11,359 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 07:11:11,359 INFO L168 Benchmark]: Toolchain (without parser) took 780932.07 ms. Allocated memory was 394.3 MB in the beginning and 515.9 MB in the end (delta: 121.6 MB). Free memory was 373.3 MB in the beginning and 331.0 MB in the end (delta: 42.3 MB). Peak memory consumption was 165.0 MB. Max. memory is 16.0 GB. [2021-06-05 07:11:11,359 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 394.3 MB. Free memory was 374.5 MB in the beginning and 374.4 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:11:11,359 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.46 ms. Allocated memory is still 394.3 MB. Free memory was 373.3 MB in the beginning and 371.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:11:11,360 INFO L168 Benchmark]: Boogie Preprocessor took 15.21 ms. Allocated memory is still 394.3 MB. Free memory was 371.8 MB in the beginning and 370.8 MB in the end (delta: 998.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:11:11,360 INFO L168 Benchmark]: RCFGBuilder took 276.60 ms. Allocated memory is still 394.3 MB. Free memory was 370.8 MB in the beginning and 357.5 MB in the end (delta: 13.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 07:11:11,360 INFO L168 Benchmark]: TraceAbstraction took 780611.72 ms. Allocated memory was 394.3 MB in the beginning and 515.9 MB in the end (delta: 121.6 MB). Free memory was 357.0 MB in the beginning and 331.0 MB in the end (delta: 26.0 MB). Peak memory consumption was 148.2 MB. Max. memory is 16.0 GB. [2021-06-05 07:11:11,364 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 0.16 ms. Allocated memory is still 394.3 MB. Free memory was 374.5 MB in the beginning and 374.4 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.46 ms. Allocated memory is still 394.3 MB. Free memory was 373.3 MB in the beginning and 371.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.21 ms. Allocated memory is still 394.3 MB. Free memory was 371.8 MB in the beginning and 370.8 MB in the end (delta: 998.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 276.60 ms. Allocated memory is still 394.3 MB. Free memory was 370.8 MB in the beginning and 357.5 MB in the end (delta: 13.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 780611.72 ms. Allocated memory was 394.3 MB in the beginning and 515.9 MB in the end (delta: 121.6 MB). Free memory was 357.0 MB in the beginning and 331.0 MB in the end (delta: 26.0 MB). Peak memory consumption was 148.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (717states) and FLOYD_HOARE automaton (currently 4 states, 45 states before enhancement),while ReachableStatesComputation was computing reachable states (7 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (717states) and FLOYD_HOARE automaton (currently 4 states, 45 states before enhancement),while ReachableStatesComputation was computing reachable states (7 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (717states) and FLOYD_HOARE automaton (currently 4 states, 45 states before enhancement),while ReachableStatesComputation was computing reachable states (7 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 48 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 780522.5ms, OverallIterations: 405, TraceHistogramMax: 3, EmptinessCheckTime: 189.2ms, AutomataDifference: 432225.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 43.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 20963 SDtfs, 42608 SDslu, 258912 SDs, 0 SdLazy, 493027 SolverSat, 14840 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 169143.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26388 GetRequests, 6541 SyntacticMatches, 547 SemanticMatches, 19300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255330 ImplicationChecksByTransitivity, 432524.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=727occurred in iteration=401, InterpolantAutomatonStates: 11936, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1854.1ms AutomataMinimizationTime, 404 MinimizatonAttempts, 56038 StatesRemovedByMinimization, 402 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1353.6ms SsaConstructionTime, 3722.5ms SatisfiabilityAnalysisTime, 252037.2ms InterpolantComputationTime, 24569 NumberOfCodeBlocks, 24569 NumberOfCodeBlocksAsserted, 1231 NumberOfCheckSat, 23762 ConstructedInterpolants, 80 QuantifiedInterpolants, 397363 SizeOfPredicates, 3886 NumberOfNonLiveVariables, 28167 ConjunctsInSsa, 13034 ConjunctsInUnsatCore, 807 InterpolantComputations, 3 PerfectInterpolantSequences, 44/7312 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