/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/mult-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 21:15:54,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 21:15:54,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 21:15:54,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 21:15:54,917 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 [2021-03-10 21:15:54,952 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 21:15:54,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 21:15:54,952 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 21:15:54,953 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 21:15:54,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 21:15:54,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 21:15:54,956 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 21:15:54,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 21:15:54,956 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 21:15:54,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 21:15:54,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 21:15:54,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 21:15:54,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 21:15:54,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 21:15:54,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 21:15:54,958 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 21:15:54,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 21:15:54,958 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 21:15:54,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 21:15:54,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 21:15:54,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 21:15:54,959 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 21:15:54,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 21:15:54,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:15:54,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 21:15:54,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 21:15:54,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 21:15:54,960 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 21:15:54,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 21:15:54,960 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 21:15:54,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 21:15:54,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 21:15:55,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 21:15:55,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 21:15:55,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 21:15:55,298 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 21:15:55,300 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 21:15:55,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl [2021-03-10 21:15:55,301 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl' [2021-03-10 21:15:55,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 21:15:55,335 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 21:15:55,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 21:15:55,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 21:15:55,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 21:15:55,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:15:55" (1/1) ... [2021-03-10 21:15:55,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:15:55" (1/1) ... [2021-03-10 21:15:55,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 21:15:55,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 21:15:55,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 21:15:55,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 21:15:55,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:15:55" (1/1) ... [2021-03-10 21:15:55,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:15:55" (1/1) ... [2021-03-10 21:15:55,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:15:55" (1/1) ... [2021-03-10 21:15:55,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:15:55" (1/1) ... [2021-03-10 21:15:55,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:15:55" (1/1) ... [2021-03-10 21:15:55,375 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:15:55" (1/1) ... [2021-03-10 21:15:55,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:15:55" (1/1) ... [2021-03-10 21:15:55,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 21:15:55,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 21:15:55,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 21:15:55,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 21:15:55,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:15:55" (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 [2021-03-10 21:15:55,431 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 21:15:55,432 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 21:15:55,432 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 21:15:55,432 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 21:15:55,432 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 21:15:55,432 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 21:15:55,432 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 21:15:55,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 21:15:55,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 21:15:55,433 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 21:15:55,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 21:15:55,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 21:15:55,434 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 21:15:55,600 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 21:15:55,600 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 21:15:55,602 INFO L202 PluginConnector]: Adding new model mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:15:55 BoogieIcfgContainer [2021-03-10 21:15:55,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 21:15:55,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 21:15:55,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 21:15:55,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 21:15:55,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:15:55" (1/2) ... [2021-03-10 21:15:55,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7df6b9 and model type mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 09:15:55, skipping insertion in model container [2021-03-10 21:15:55,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:15:55" (2/2) ... [2021-03-10 21:15:55,608 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.bpl [2021-03-10 21:15:55,613 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 21:15:55,613 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 21:15:55,616 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 21:15:55,617 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 21:15:55,647 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-10 21:15:55,661 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 21:15:55,676 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 21:15:55,676 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 21:15:55,676 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 21:15:55,676 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 21:15:55,676 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 21:15:55,676 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 21:15:55,676 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 21:15:55,676 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 21:15:55,683 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-03-10 21:15:55,701 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:55,703 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:55,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:15:55,710 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:55,711 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:55,711 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:55,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:55,715 INFO L82 PathProgramCache]: Analyzing trace with hash 49297092, now seen corresponding path program 1 times [2021-03-10 21:15:55,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:55,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44892668] [2021-03-10 21:15:55,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:56,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44892668] [2021-03-10 21:15:56,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:15:56,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 21:15:56,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532377670] [2021-03-10 21:15:56,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 21:15:56,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:56,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 21:15:56,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 21:15:56,055 INFO L87 Difference]: Start difference. First operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:56,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:56,103 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-03-10 21:15:56,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 21:15:56,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:15:56,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:56,122 INFO L225 Difference]: With dead ends: 214 [2021-03-10 21:15:56,122 INFO L226 Difference]: Without dead ends: 199 [2021-03-10 21:15:56,123 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 21:15:56,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-03-10 21:15:56,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-03-10 21:15:56,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:56,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-03-10 21:15:56,172 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-03-10 21:15:56,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:56,173 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-03-10 21:15:56,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:56,173 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-03-10 21:15:56,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:15:56,178 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:56,178 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:56,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 21:15:56,179 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:56,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:56,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1895819686, now seen corresponding path program 1 times [2021-03-10 21:15:56,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:56,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841925016] [2021-03-10 21:15:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:56,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841925016] [2021-03-10 21:15:56,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832174748] [2021-03-10 21:15:56,246 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 [2021-03-10 21:15:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:56,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:15:56,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:56,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:56,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2021-03-10 21:15:56,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545764924] [2021-03-10 21:15:56,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:15:56,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:56,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:15:56,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:15:56,415 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:56,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:56,636 INFO L93 Difference]: Finished difference Result 468 states and 1303 transitions. [2021-03-10 21:15:56,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:15:56,637 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:15:56,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:56,642 INFO L225 Difference]: With dead ends: 468 [2021-03-10 21:15:56,643 INFO L226 Difference]: Without dead ends: 468 [2021-03-10 21:15:56,643 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:15:56,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-03-10 21:15:56,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 173. [2021-03-10 21:15:56,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 3.0) internal successors, (516), 172 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:56,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 516 transitions. [2021-03-10 21:15:56,678 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 516 transitions. Word has length 17 [2021-03-10 21:15:56,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:56,680 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 516 transitions. [2021-03-10 21:15:56,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:56,680 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 516 transitions. [2021-03-10 21:15:56,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:15:56,685 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:56,685 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:56,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-03-10 21:15:56,909 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:56,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:56,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1698446180, now seen corresponding path program 1 times [2021-03-10 21:15:56,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:56,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895587078] [2021-03-10 21:15:56,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:56,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895587078] [2021-03-10 21:15:56,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:15:56,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:15:56,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482587535] [2021-03-10 21:15:56,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:15:56,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:56,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:15:56,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:15:56,951 INFO L87 Difference]: Start difference. First operand 173 states and 516 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:56,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:56,992 INFO L93 Difference]: Finished difference Result 283 states and 814 transitions. [2021-03-10 21:15:56,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:15:56,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:15:56,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:57,001 INFO L225 Difference]: With dead ends: 283 [2021-03-10 21:15:57,001 INFO L226 Difference]: Without dead ends: 283 [2021-03-10 21:15:57,002 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:15:57,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-03-10 21:15:57,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 180. [2021-03-10 21:15:57,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.994413407821229) internal successors, (536), 179 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:57,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 536 transitions. [2021-03-10 21:15:57,016 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 536 transitions. Word has length 17 [2021-03-10 21:15:57,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:57,016 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 536 transitions. [2021-03-10 21:15:57,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:57,016 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 536 transitions. [2021-03-10 21:15:57,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:15:57,017 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:57,017 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:57,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 21:15:57,017 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:57,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:57,018 INFO L82 PathProgramCache]: Analyzing trace with hash 899406176, now seen corresponding path program 2 times [2021-03-10 21:15:57,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:57,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310103612] [2021-03-10 21:15:57,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:57,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310103612] [2021-03-10 21:15:57,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:15:57,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:15:57,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882300195] [2021-03-10 21:15:57,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:15:57,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:57,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:15:57,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:15:57,056 INFO L87 Difference]: Start difference. First operand 180 states and 536 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:57,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:57,118 INFO L93 Difference]: Finished difference Result 339 states and 942 transitions. [2021-03-10 21:15:57,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:15:57,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:15:57,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:57,121 INFO L225 Difference]: With dead ends: 339 [2021-03-10 21:15:57,121 INFO L226 Difference]: Without dead ends: 339 [2021-03-10 21:15:57,121 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:15:57,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-03-10 21:15:57,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 156. [2021-03-10 21:15:57,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.935483870967742) internal successors, (455), 155 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:57,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 455 transitions. [2021-03-10 21:15:57,131 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 455 transitions. Word has length 17 [2021-03-10 21:15:57,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:57,132 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 455 transitions. [2021-03-10 21:15:57,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:57,132 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 455 transitions. [2021-03-10 21:15:57,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:15:57,133 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:57,133 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:57,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 21:15:57,133 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:57,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:57,133 INFO L82 PathProgramCache]: Analyzing trace with hash 567041058, now seen corresponding path program 1 times [2021-03-10 21:15:57,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:57,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197705286] [2021-03-10 21:15:57,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:57,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197705286] [2021-03-10 21:15:57,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:15:57,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:15:57,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558200718] [2021-03-10 21:15:57,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:15:57,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:57,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:15:57,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:15:57,191 INFO L87 Difference]: Start difference. First operand 156 states and 455 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:57,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:57,287 INFO L93 Difference]: Finished difference Result 253 states and 691 transitions. [2021-03-10 21:15:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:15:57,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:15:57,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:57,289 INFO L225 Difference]: With dead ends: 253 [2021-03-10 21:15:57,289 INFO L226 Difference]: Without dead ends: 242 [2021-03-10 21:15:57,289 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:15:57,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-03-10 21:15:57,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 175. [2021-03-10 21:15:57,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8620689655172415) internal successors, (498), 174 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:57,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 498 transitions. [2021-03-10 21:15:57,296 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 498 transitions. Word has length 17 [2021-03-10 21:15:57,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:57,296 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 498 transitions. [2021-03-10 21:15:57,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:57,296 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 498 transitions. [2021-03-10 21:15:57,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:15:57,297 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:57,297 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:57,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 21:15:57,297 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:57,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:57,298 INFO L82 PathProgramCache]: Analyzing trace with hash 514397406, now seen corresponding path program 2 times [2021-03-10 21:15:57,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:57,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444624250] [2021-03-10 21:15:57,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:57,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444624250] [2021-03-10 21:15:57,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455990607] [2021-03-10 21:15:57,364 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 [2021-03-10 21:15:57,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:57,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:57,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:15:57,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:57,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:57,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-03-10 21:15:57,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734855759] [2021-03-10 21:15:57,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:15:57,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:57,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:15:57,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:15:57,557 INFO L87 Difference]: Start difference. First operand 175 states and 498 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:57,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:57,888 INFO L93 Difference]: Finished difference Result 429 states and 1177 transitions. [2021-03-10 21:15:57,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:15:57,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:15:57,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:57,892 INFO L225 Difference]: With dead ends: 429 [2021-03-10 21:15:57,895 INFO L226 Difference]: Without dead ends: 429 [2021-03-10 21:15:57,895 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 246.7ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:15:57,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-03-10 21:15:57,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 185. [2021-03-10 21:15:57,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9184782608695654) internal successors, (537), 184 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:57,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 537 transitions. [2021-03-10 21:15:57,903 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 537 transitions. Word has length 17 [2021-03-10 21:15:57,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:57,903 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 537 transitions. [2021-03-10 21:15:57,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:57,904 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 537 transitions. [2021-03-10 21:15:57,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:15:57,907 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:57,907 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:58,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:58,123 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:58,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:58,124 INFO L82 PathProgramCache]: Analyzing trace with hash -897270306, now seen corresponding path program 3 times [2021-03-10 21:15:58,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:58,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453060497] [2021-03-10 21:15:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:58,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453060497] [2021-03-10 21:15:58,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:15:58,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:15:58,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249077105] [2021-03-10 21:15:58,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:15:58,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:58,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:15:58,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:15:58,159 INFO L87 Difference]: Start difference. First operand 185 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:58,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:58,230 INFO L93 Difference]: Finished difference Result 300 states and 817 transitions. [2021-03-10 21:15:58,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:15:58,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:15:58,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:58,233 INFO L225 Difference]: With dead ends: 300 [2021-03-10 21:15:58,233 INFO L226 Difference]: Without dead ends: 296 [2021-03-10 21:15:58,233 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:15:58,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-03-10 21:15:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 191. [2021-03-10 21:15:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.873684210526316) internal successors, (546), 190 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 546 transitions. [2021-03-10 21:15:58,239 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 546 transitions. Word has length 17 [2021-03-10 21:15:58,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:58,239 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 546 transitions. [2021-03-10 21:15:58,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:58,239 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 546 transitions. [2021-03-10 21:15:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:15:58,240 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:58,240 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:58,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 21:15:58,240 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:58,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:58,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1386380322, now seen corresponding path program 3 times [2021-03-10 21:15:58,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:58,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415591931] [2021-03-10 21:15:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:58,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415591931] [2021-03-10 21:15:58,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:15:58,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:15:58,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490265124] [2021-03-10 21:15:58,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:15:58,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:58,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:15:58,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:15:58,298 INFO L87 Difference]: Start difference. First operand 191 states and 546 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:58,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:58,421 INFO L93 Difference]: Finished difference Result 305 states and 826 transitions. [2021-03-10 21:15:58,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:15:58,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:15:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:58,424 INFO L225 Difference]: With dead ends: 305 [2021-03-10 21:15:58,424 INFO L226 Difference]: Without dead ends: 294 [2021-03-10 21:15:58,424 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:15:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-03-10 21:15:58,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 197. [2021-03-10 21:15:58,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8877551020408165) internal successors, (566), 196 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 566 transitions. [2021-03-10 21:15:58,431 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 566 transitions. Word has length 17 [2021-03-10 21:15:58,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:58,432 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 566 transitions. [2021-03-10 21:15:58,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:58,432 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 566 transitions. [2021-03-10 21:15:58,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:15:58,433 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:58,433 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:58,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 21:15:58,433 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:58,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:58,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1009070818, now seen corresponding path program 4 times [2021-03-10 21:15:58,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:58,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966246988] [2021-03-10 21:15:58,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:58,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966246988] [2021-03-10 21:15:58,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:15:58,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:15:58,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280377868] [2021-03-10 21:15:58,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:15:58,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:58,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:15:58,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:15:58,464 INFO L87 Difference]: Start difference. First operand 197 states and 566 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:58,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:58,573 INFO L93 Difference]: Finished difference Result 285 states and 789 transitions. [2021-03-10 21:15:58,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:15:58,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:15:58,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:58,576 INFO L225 Difference]: With dead ends: 285 [2021-03-10 21:15:58,577 INFO L226 Difference]: Without dead ends: 285 [2021-03-10 21:15:58,577 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:15:58,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-03-10 21:15:58,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 203. [2021-03-10 21:15:58,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.896039603960396) internal successors, (585), 202 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:58,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 585 transitions. [2021-03-10 21:15:58,584 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 585 transitions. Word has length 17 [2021-03-10 21:15:58,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:58,584 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 585 transitions. [2021-03-10 21:15:58,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:58,584 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 585 transitions. [2021-03-10 21:15:58,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:15:58,585 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:58,585 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:58,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-10 21:15:58,585 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:58,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:58,586 INFO L82 PathProgramCache]: Analyzing trace with hash -683037018, now seen corresponding path program 2 times [2021-03-10 21:15:58,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:58,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241985453] [2021-03-10 21:15:58,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:58,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241985453] [2021-03-10 21:15:58,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:15:58,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:15:58,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648548046] [2021-03-10 21:15:58,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:15:58,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:58,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:15:58,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:15:58,618 INFO L87 Difference]: Start difference. First operand 203 states and 585 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:58,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:58,687 INFO L93 Difference]: Finished difference Result 251 states and 716 transitions. [2021-03-10 21:15:58,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:15:58,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:15:58,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:58,693 INFO L225 Difference]: With dead ends: 251 [2021-03-10 21:15:58,693 INFO L226 Difference]: Without dead ends: 243 [2021-03-10 21:15:58,693 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:15:58,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-03-10 21:15:58,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 193. [2021-03-10 21:15:58,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.8958333333333335) internal successors, (556), 192 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:58,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 556 transitions. [2021-03-10 21:15:58,699 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 556 transitions. Word has length 17 [2021-03-10 21:15:58,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:58,700 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 556 transitions. [2021-03-10 21:15:58,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:58,701 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 556 transitions. [2021-03-10 21:15:58,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:15:58,701 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:58,701 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:58,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-10 21:15:58,702 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:58,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:58,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1302783074, now seen corresponding path program 5 times [2021-03-10 21:15:58,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:58,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132862175] [2021-03-10 21:15:58,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:58,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132862175] [2021-03-10 21:15:58,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871958855] [2021-03-10 21:15:58,744 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 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 [2021-03-10 21:15:58,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:15:58,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:58,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:15:58,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:58,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:58,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:58,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-03-10 21:15:58,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603083896] [2021-03-10 21:15:58,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:15:58,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:58,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:15:58,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:15:58,944 INFO L87 Difference]: Start difference. First operand 193 states and 556 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:59,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:59,172 INFO L93 Difference]: Finished difference Result 357 states and 1012 transitions. [2021-03-10 21:15:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:15:59,172 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:15:59,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:59,174 INFO L225 Difference]: With dead ends: 357 [2021-03-10 21:15:59,174 INFO L226 Difference]: Without dead ends: 357 [2021-03-10 21:15:59,174 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 168.9ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:15:59,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-03-10 21:15:59,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 189. [2021-03-10 21:15:59,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.882978723404255) internal successors, (542), 188 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 542 transitions. [2021-03-10 21:15:59,188 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 542 transitions. Word has length 17 [2021-03-10 21:15:59,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:59,188 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 542 transitions. [2021-03-10 21:15:59,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:59,188 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 542 transitions. [2021-03-10 21:15:59,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:15:59,189 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:59,189 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:59,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-03-10 21:15:59,403 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:59,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:59,404 INFO L82 PathProgramCache]: Analyzing trace with hash -266101350, now seen corresponding path program 6 times [2021-03-10 21:15:59,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:59,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058929853] [2021-03-10 21:15:59,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:59,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058929853] [2021-03-10 21:15:59,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062549656] [2021-03-10 21:15:59,454 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 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 [2021-03-10 21:15:59,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:15:59,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:59,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:15:59,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:59,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:59,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-03-10 21:15:59,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596183299] [2021-03-10 21:15:59,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:15:59,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:59,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:15:59,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:15:59,632 INFO L87 Difference]: Start difference. First operand 189 states and 542 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:59,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:15:59,850 INFO L93 Difference]: Finished difference Result 311 states and 903 transitions. [2021-03-10 21:15:59,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:15:59,850 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:15:59,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:15:59,852 INFO L225 Difference]: With dead ends: 311 [2021-03-10 21:15:59,852 INFO L226 Difference]: Without dead ends: 311 [2021-03-10 21:15:59,853 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:15:59,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-03-10 21:15:59,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 168. [2021-03-10 21:15:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.8862275449101795) internal successors, (482), 167 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:59,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 482 transitions. [2021-03-10 21:15:59,859 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 482 transitions. Word has length 17 [2021-03-10 21:15:59,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:59,859 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 482 transitions. [2021-03-10 21:15:59,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:59,859 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 482 transitions. [2021-03-10 21:15:59,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:15:59,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:59,860 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:00,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:00,082 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:00,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:00,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1253760644, now seen corresponding path program 1 times [2021-03-10 21:16:00,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:00,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599392293] [2021-03-10 21:16:00,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:00,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599392293] [2021-03-10 21:16:00,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062563957] [2021-03-10 21:16:00,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-03-10 21:16:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:00,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:16:00,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:00,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:00,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-03-10 21:16:00,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864520099] [2021-03-10 21:16:00,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:16:00,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:00,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:16:00,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:16:00,281 INFO L87 Difference]: Start difference. First operand 168 states and 482 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-03-10 21:16:00,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:00,365 INFO L93 Difference]: Finished difference Result 554 states and 1610 transitions. [2021-03-10 21:16:00,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:16:00,366 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 19 [2021-03-10 21:16:00,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:00,368 INFO L225 Difference]: With dead ends: 554 [2021-03-10 21:16:00,368 INFO L226 Difference]: Without dead ends: 524 [2021-03-10 21:16:00,369 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:16:00,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-03-10 21:16:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 301. [2021-03-10 21:16:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.06) internal successors, (918), 300 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:00,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 918 transitions. [2021-03-10 21:16:00,378 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 918 transitions. Word has length 19 [2021-03-10 21:16:00,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:00,378 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 918 transitions. [2021-03-10 21:16:00,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-03-10 21:16:00,378 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 918 transitions. [2021-03-10 21:16:00,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:16:00,380 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:00,380 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:00,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-10 21:16:00,601 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:00,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:00,602 INFO L82 PathProgramCache]: Analyzing trace with hash -346541578, now seen corresponding path program 2 times [2021-03-10 21:16:00,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:00,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514490688] [2021-03-10 21:16:00,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:00,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514490688] [2021-03-10 21:16:00,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335819027] [2021-03-10 21:16:00,659 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 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 [2021-03-10 21:16:00,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:00,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:00,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:16:00,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:00,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:00,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-03-10 21:16:00,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498873545] [2021-03-10 21:16:00,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:16:00,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:00,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:16:00,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:16:00,747 INFO L87 Difference]: Start difference. First operand 301 states and 918 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-03-10 21:16:00,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:00,832 INFO L93 Difference]: Finished difference Result 707 states and 2108 transitions. [2021-03-10 21:16:00,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:16:00,832 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 19 [2021-03-10 21:16:00,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:00,835 INFO L225 Difference]: With dead ends: 707 [2021-03-10 21:16:00,836 INFO L226 Difference]: Without dead ends: 662 [2021-03-10 21:16:00,836 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:16:00,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-03-10 21:16:00,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 412. [2021-03-10 21:16:00,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.1800486618004866) internal successors, (1307), 411 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:00,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1307 transitions. [2021-03-10 21:16:00,848 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1307 transitions. Word has length 19 [2021-03-10 21:16:00,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:00,848 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 1307 transitions. [2021-03-10 21:16:00,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-03-10 21:16:00,848 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1307 transitions. [2021-03-10 21:16:00,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:00,851 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:00,852 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:01,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:01,067 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:01,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:01,068 INFO L82 PathProgramCache]: Analyzing trace with hash -233680794, now seen corresponding path program 3 times [2021-03-10 21:16:01,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:01,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504737056] [2021-03-10 21:16:01,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:01,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504737056] [2021-03-10 21:16:01,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248792259] [2021-03-10 21:16:01,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:16:01,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:16:01,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:01,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:16:01,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:01,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:01,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 21:16:01,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037539720] [2021-03-10 21:16:01,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:16:01,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:01,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:16:01,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:16:01,245 INFO L87 Difference]: Start difference. First operand 412 states and 1307 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:01,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:01,535 INFO L93 Difference]: Finished difference Result 1001 states and 3011 transitions. [2021-03-10 21:16:01,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:16:01,536 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:01,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:01,541 INFO L225 Difference]: With dead ends: 1001 [2021-03-10 21:16:01,541 INFO L226 Difference]: Without dead ends: 1001 [2021-03-10 21:16:01,541 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:16:01,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2021-03-10 21:16:01,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 544. [2021-03-10 21:16:01,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.296500920810313) internal successors, (1790), 543 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:01,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1790 transitions. [2021-03-10 21:16:01,558 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1790 transitions. Word has length 21 [2021-03-10 21:16:01,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:01,558 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 1790 transitions. [2021-03-10 21:16:01,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:01,558 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1790 transitions. [2021-03-10 21:16:01,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:01,559 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:01,559 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:01,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 21:16:01,781 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:01,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:01,782 INFO L82 PathProgramCache]: Analyzing trace with hash -2080042904, now seen corresponding path program 1 times [2021-03-10 21:16:01,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:01,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867658186] [2021-03-10 21:16:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:01,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867658186] [2021-03-10 21:16:01,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287347700] [2021-03-10 21:16:01,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:01,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:16:01,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:01,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:01,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 21:16:01,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697343461] [2021-03-10 21:16:01,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:16:01,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:01,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:16:01,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:16:01,972 INFO L87 Difference]: Start difference. First operand 544 states and 1790 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:02,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:02,430 INFO L93 Difference]: Finished difference Result 1180 states and 3710 transitions. [2021-03-10 21:16:02,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:16:02,430 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:02,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:02,436 INFO L225 Difference]: With dead ends: 1180 [2021-03-10 21:16:02,436 INFO L226 Difference]: Without dead ends: 1180 [2021-03-10 21:16:02,437 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 347.8ms TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:16:02,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-03-10 21:16:02,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 666. [2021-03-10 21:16:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 3.299248120300752) internal successors, (2194), 665 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:02,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2194 transitions. [2021-03-10 21:16:02,460 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2194 transitions. Word has length 21 [2021-03-10 21:16:02,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:02,460 INFO L480 AbstractCegarLoop]: Abstraction has 666 states and 2194 transitions. [2021-03-10 21:16:02,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:02,461 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2194 transitions. [2021-03-10 21:16:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:02,474 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:02,474 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:02,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 21:16:02,695 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:02,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:02,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1584655390, now seen corresponding path program 4 times [2021-03-10 21:16:02,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:02,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779441955] [2021-03-10 21:16:02,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:02,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779441955] [2021-03-10 21:16:02,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783856512] [2021-03-10 21:16:02,742 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) [2021-03-10 21:16:02,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:02,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:02,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:02,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:02,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:02,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:02,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307835609] [2021-03-10 21:16:02,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:02,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:02,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:02,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:02,906 INFO L87 Difference]: Start difference. First operand 666 states and 2194 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:03,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:03,319 INFO L93 Difference]: Finished difference Result 1002 states and 3098 transitions. [2021-03-10 21:16:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:16:03,320 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:03,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:03,324 INFO L225 Difference]: With dead ends: 1002 [2021-03-10 21:16:03,324 INFO L226 Difference]: Without dead ends: 977 [2021-03-10 21:16:03,325 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 321.7ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:16:03,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-03-10 21:16:03,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 713. [2021-03-10 21:16:03,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 3.289325842696629) internal successors, (2342), 712 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:03,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2342 transitions. [2021-03-10 21:16:03,345 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2342 transitions. Word has length 21 [2021-03-10 21:16:03,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:03,345 INFO L480 AbstractCegarLoop]: Abstraction has 713 states and 2342 transitions. [2021-03-10 21:16:03,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:03,345 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2342 transitions. [2021-03-10 21:16:03,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:03,347 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:03,347 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:03,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 21:16:03,569 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:03,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:03,570 INFO L82 PathProgramCache]: Analyzing trace with hash 2036942238, now seen corresponding path program 5 times [2021-03-10 21:16:03,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:03,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610731876] [2021-03-10 21:16:03,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:03,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610731876] [2021-03-10 21:16:03,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238438971] [2021-03-10 21:16:03,601 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 [2021-03-10 21:16:03,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:16:03,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:03,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:03,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:03,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:03,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:03,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731621392] [2021-03-10 21:16:03,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:03,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:03,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:03,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:03,738 INFO L87 Difference]: Start difference. First operand 713 states and 2342 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:04,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:04,692 INFO L93 Difference]: Finished difference Result 1926 states and 5690 transitions. [2021-03-10 21:16:04,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 21:16:04,692 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:04,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:04,701 INFO L225 Difference]: With dead ends: 1926 [2021-03-10 21:16:04,701 INFO L226 Difference]: Without dead ends: 1926 [2021-03-10 21:16:04,702 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 645.6ms TimeCoverageRelationStatistics Valid=572, Invalid=1498, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:16:04,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-03-10 21:16:04,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 812. [2021-03-10 21:16:04,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.347718865598027) internal successors, (2715), 811 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:04,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2715 transitions. [2021-03-10 21:16:04,736 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2715 transitions. Word has length 21 [2021-03-10 21:16:04,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:04,736 INFO L480 AbstractCegarLoop]: Abstraction has 812 states and 2715 transitions. [2021-03-10 21:16:04,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:04,737 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2715 transitions. [2021-03-10 21:16:04,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:04,740 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:04,740 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:04,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 21:16:04,951 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:04,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:04,952 INFO L82 PathProgramCache]: Analyzing trace with hash 625274526, now seen corresponding path program 2 times [2021-03-10 21:16:04,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:04,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216639529] [2021-03-10 21:16:04,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:04,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216639529] [2021-03-10 21:16:04,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88694205] [2021-03-10 21:16:04,989 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 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 [2021-03-10 21:16:05,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:05,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:05,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:16:05,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:05,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:05,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 21:16:05,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117995248] [2021-03-10 21:16:05,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:16:05,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:05,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:16:05,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:16:05,107 INFO L87 Difference]: Start difference. First operand 812 states and 2715 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:05,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:05,482 INFO L93 Difference]: Finished difference Result 2526 states and 7927 transitions. [2021-03-10 21:16:05,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:16:05,482 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:05,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:05,494 INFO L225 Difference]: With dead ends: 2526 [2021-03-10 21:16:05,494 INFO L226 Difference]: Without dead ends: 2518 [2021-03-10 21:16:05,494 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 254.5ms TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:16:05,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2021-03-10 21:16:05,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1045. [2021-03-10 21:16:05,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.4300766283524906) internal successors, (3581), 1044 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:05,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3581 transitions. [2021-03-10 21:16:05,537 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3581 transitions. Word has length 21 [2021-03-10 21:16:05,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:05,537 INFO L480 AbstractCegarLoop]: Abstraction has 1045 states and 3581 transitions. [2021-03-10 21:16:05,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:05,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3581 transitions. [2021-03-10 21:16:05,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:05,539 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:05,540 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:05,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:05,761 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:05,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:05,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1603831970, now seen corresponding path program 3 times [2021-03-10 21:16:05,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:05,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114914991] [2021-03-10 21:16:05,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:05,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114914991] [2021-03-10 21:16:05,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74911426] [2021-03-10 21:16:05,807 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:16:05,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:16:05,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:05,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:16:05,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:05,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:05,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:05,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 21:16:05,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933735338] [2021-03-10 21:16:05,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:16:05,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:05,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:16:05,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:16:05,948 INFO L87 Difference]: Start difference. First operand 1045 states and 3581 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:06,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:06,304 INFO L93 Difference]: Finished difference Result 2671 states and 8447 transitions. [2021-03-10 21:16:06,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:16:06,305 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:06,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:06,316 INFO L225 Difference]: With dead ends: 2671 [2021-03-10 21:16:06,316 INFO L226 Difference]: Without dead ends: 2671 [2021-03-10 21:16:06,317 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:16:06,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2021-03-10 21:16:06,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 1037. [2021-03-10 21:16:06,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1036 states have (on average 3.422779922779923) internal successors, (3546), 1036 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:06,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3546 transitions. [2021-03-10 21:16:06,356 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3546 transitions. Word has length 21 [2021-03-10 21:16:06,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:06,356 INFO L480 AbstractCegarLoop]: Abstraction has 1037 states and 3546 transitions. [2021-03-10 21:16:06,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:06,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3546 transitions. [2021-03-10 21:16:06,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:06,358 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:06,358 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:06,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:06,575 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:06,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:06,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1910066590, now seen corresponding path program 6 times [2021-03-10 21:16:06,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:06,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777516633] [2021-03-10 21:16:06,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:06,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777516633] [2021-03-10 21:16:06,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444473486] [2021-03-10 21:16:06,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:16:06,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:16:06,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:06,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:06,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:06,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:06,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:06,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027998364] [2021-03-10 21:16:06,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:06,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:06,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:06,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:06,756 INFO L87 Difference]: Start difference. First operand 1037 states and 3546 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:07,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:07,385 INFO L93 Difference]: Finished difference Result 1993 states and 6035 transitions. [2021-03-10 21:16:07,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:16:07,386 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:07,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:07,392 INFO L225 Difference]: With dead ends: 1993 [2021-03-10 21:16:07,392 INFO L226 Difference]: Without dead ends: 1972 [2021-03-10 21:16:07,392 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 466.1ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:16:07,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2021-03-10 21:16:07,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1033. [2021-03-10 21:16:07,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 3.4186046511627906) internal successors, (3528), 1032 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:07,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3528 transitions. [2021-03-10 21:16:07,427 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3528 transitions. Word has length 21 [2021-03-10 21:16:07,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:07,427 INFO L480 AbstractCegarLoop]: Abstraction has 1033 states and 3528 transitions. [2021-03-10 21:16:07,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:07,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3528 transitions. [2021-03-10 21:16:07,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:07,430 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:07,430 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:07,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 21:16:07,644 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:07,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:07,644 INFO L82 PathProgramCache]: Analyzing trace with hash -178637854, now seen corresponding path program 7 times [2021-03-10 21:16:07,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:07,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322294354] [2021-03-10 21:16:07,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:07,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322294354] [2021-03-10 21:16:07,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007443993] [2021-03-10 21:16:07,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:07,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:07,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:07,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:07,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:07,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310354974] [2021-03-10 21:16:07,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:07,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:07,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:07,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:07,835 INFO L87 Difference]: Start difference. First operand 1033 states and 3528 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:08,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:08,240 INFO L93 Difference]: Finished difference Result 1381 states and 4426 transitions. [2021-03-10 21:16:08,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:16:08,240 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:08,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:08,244 INFO L225 Difference]: With dead ends: 1381 [2021-03-10 21:16:08,244 INFO L226 Difference]: Without dead ends: 1356 [2021-03-10 21:16:08,245 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 329.1ms TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:16:08,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-03-10 21:16:08,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1063. [2021-03-10 21:16:08,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 3.4237288135593222) internal successors, (3636), 1062 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 3636 transitions. [2021-03-10 21:16:08,270 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 3636 transitions. Word has length 21 [2021-03-10 21:16:08,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:08,270 INFO L480 AbstractCegarLoop]: Abstraction has 1063 states and 3636 transitions. [2021-03-10 21:16:08,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:08,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 3636 transitions. [2021-03-10 21:16:08,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:08,273 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:08,273 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:08,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:08,494 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:08,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:08,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1461928802, now seen corresponding path program 8 times [2021-03-10 21:16:08,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:08,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832157029] [2021-03-10 21:16:08,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:08,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832157029] [2021-03-10 21:16:08,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302286936] [2021-03-10 21:16:08,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:08,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:08,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:08,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:08,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:08,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:08,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:08,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705864719] [2021-03-10 21:16:08,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:08,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:08,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:08,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:08,640 INFO L87 Difference]: Start difference. First operand 1063 states and 3636 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:09,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:09,219 INFO L93 Difference]: Finished difference Result 1755 states and 5386 transitions. [2021-03-10 21:16:09,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:16:09,220 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:09,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:09,224 INFO L225 Difference]: With dead ends: 1755 [2021-03-10 21:16:09,224 INFO L226 Difference]: Without dead ends: 1734 [2021-03-10 21:16:09,225 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 428.8ms TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:16:09,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-03-10 21:16:09,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1142. [2021-03-10 21:16:09,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.422436459246275) internal successors, (3905), 1141 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:09,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3905 transitions. [2021-03-10 21:16:09,255 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3905 transitions. Word has length 21 [2021-03-10 21:16:09,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:09,255 INFO L480 AbstractCegarLoop]: Abstraction has 1142 states and 3905 transitions. [2021-03-10 21:16:09,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:09,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3905 transitions. [2021-03-10 21:16:09,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:09,258 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:09,258 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:09,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 21:16:09,471 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:09,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:09,472 INFO L82 PathProgramCache]: Analyzing trace with hash -357334110, now seen corresponding path program 9 times [2021-03-10 21:16:09,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:09,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149749968] [2021-03-10 21:16:09,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:09,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149749968] [2021-03-10 21:16:09,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230794983] [2021-03-10 21:16:09,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:09,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:16:09,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:09,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:09,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:09,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:09,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:09,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890295563] [2021-03-10 21:16:09,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:09,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:09,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:09,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:09,650 INFO L87 Difference]: Start difference. First operand 1142 states and 3905 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-03-10 21:16:10,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:10,348 INFO L93 Difference]: Finished difference Result 1827 states and 5611 transitions. [2021-03-10 21:16:10,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:16:10,348 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 [2021-03-10 21:16:10,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:10,352 INFO L225 Difference]: With dead ends: 1827 [2021-03-10 21:16:10,352 INFO L226 Difference]: Without dead ends: 1827 [2021-03-10 21:16:10,352 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 561.9ms TimeCoverageRelationStatistics Valid=398, Invalid=1242, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:16:10,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-03-10 21:16:10,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1142. [2021-03-10 21:16:10,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.4171779141104293) internal successors, (3899), 1141 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:10,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3899 transitions. [2021-03-10 21:16:10,380 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3899 transitions. Word has length 21 [2021-03-10 21:16:10,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:10,381 INFO L480 AbstractCegarLoop]: Abstraction has 1142 states and 3899 transitions. [2021-03-10 21:16:10,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-03-10 21:16:10,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3899 transitions. [2021-03-10 21:16:10,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:10,383 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:10,383 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:10,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:10,605 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:10,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:10,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2049441946, now seen corresponding path program 10 times [2021-03-10 21:16:10,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:10,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278514112] [2021-03-10 21:16:10,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:10,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278514112] [2021-03-10 21:16:10,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412194391] [2021-03-10 21:16:10,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:10,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:10,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:10,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:16:10,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:10,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:10,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-03-10 21:16:10,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414087776] [2021-03-10 21:16:10,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:16:10,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:10,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:16:10,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:16:10,745 INFO L87 Difference]: Start difference. First operand 1142 states and 3899 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:10,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:10,949 INFO L93 Difference]: Finished difference Result 1785 states and 5662 transitions. [2021-03-10 21:16:10,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:16:10,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:10,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:10,954 INFO L225 Difference]: With dead ends: 1785 [2021-03-10 21:16:10,954 INFO L226 Difference]: Without dead ends: 1777 [2021-03-10 21:16:10,955 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:16:10,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-03-10 21:16:10,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1158. [2021-03-10 21:16:10,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.3958513396715646) internal successors, (3929), 1157 states have internal predecessors, (3929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:10,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3929 transitions. [2021-03-10 21:16:10,991 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3929 transitions. Word has length 21 [2021-03-10 21:16:10,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:10,992 INFO L480 AbstractCegarLoop]: Abstraction has 1158 states and 3929 transitions. [2021-03-10 21:16:10,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:10,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3929 transitions. [2021-03-10 21:16:10,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:10,995 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:10,996 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:11,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 21:16:11,211 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:11,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:11,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1449955162, now seen corresponding path program 11 times [2021-03-10 21:16:11,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:11,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504151897] [2021-03-10 21:16:11,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:11,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:11,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504151897] [2021-03-10 21:16:11,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570222030] [2021-03-10 21:16:11,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:11,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:11,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:11,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:11,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:11,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:11,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:11,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945243294] [2021-03-10 21:16:11,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:11,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:11,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:11,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:11,388 INFO L87 Difference]: Start difference. First operand 1158 states and 3929 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:12,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:12,240 INFO L93 Difference]: Finished difference Result 2577 states and 7865 transitions. [2021-03-10 21:16:12,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 21:16:12,241 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:12,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:12,247 INFO L225 Difference]: With dead ends: 2577 [2021-03-10 21:16:12,247 INFO L226 Difference]: Without dead ends: 2577 [2021-03-10 21:16:12,248 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 633.8ms TimeCoverageRelationStatistics Valid=643, Invalid=1807, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:16:12,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2021-03-10 21:16:12,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 1259. [2021-03-10 21:16:12,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1258 states have (on average 3.4324324324324325) internal successors, (4318), 1258 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:12,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 4318 transitions. [2021-03-10 21:16:12,286 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 4318 transitions. Word has length 21 [2021-03-10 21:16:12,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:12,287 INFO L480 AbstractCegarLoop]: Abstraction has 1259 states and 4318 transitions. [2021-03-10 21:16:12,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:12,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 4318 transitions. [2021-03-10 21:16:12,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:12,290 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:12,290 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:12,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-10 21:16:12,503 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:12,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:12,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1323079514, now seen corresponding path program 12 times [2021-03-10 21:16:12,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:12,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369394137] [2021-03-10 21:16:12,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:12,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369394137] [2021-03-10 21:16:12,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11045279] [2021-03-10 21:16:12,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:12,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:16:12,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:12,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:12,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:12,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:12,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:12,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135800205] [2021-03-10 21:16:12,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:12,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:12,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:12,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:12,694 INFO L87 Difference]: Start difference. First operand 1259 states and 4318 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:13,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:13,249 INFO L93 Difference]: Finished difference Result 2270 states and 6943 transitions. [2021-03-10 21:16:13,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:16:13,250 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:13,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:13,255 INFO L225 Difference]: With dead ends: 2270 [2021-03-10 21:16:13,255 INFO L226 Difference]: Without dead ends: 2249 [2021-03-10 21:16:13,255 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 375.7ms TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:16:13,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2021-03-10 21:16:13,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 1255. [2021-03-10 21:16:13,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 3.4210526315789473) internal successors, (4290), 1254 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:13,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 4290 transitions. [2021-03-10 21:16:13,289 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 4290 transitions. Word has length 21 [2021-03-10 21:16:13,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:13,289 INFO L480 AbstractCegarLoop]: Abstraction has 1255 states and 4290 transitions. [2021-03-10 21:16:13,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:13,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 4290 transitions. [2021-03-10 21:16:13,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:13,293 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:13,293 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:13,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 21:16:13,512 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:13,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:13,513 INFO L82 PathProgramCache]: Analyzing trace with hash 2108532062, now seen corresponding path program 13 times [2021-03-10 21:16:13,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:13,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492194758] [2021-03-10 21:16:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:13,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492194758] [2021-03-10 21:16:13,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694930850] [2021-03-10 21:16:13,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:13,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:13,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:13,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:13,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:13,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022381825] [2021-03-10 21:16:13,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:13,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:13,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:13,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:13,713 INFO L87 Difference]: Start difference. First operand 1255 states and 4290 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:14,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:14,785 INFO L93 Difference]: Finished difference Result 2820 states and 8574 transitions. [2021-03-10 21:16:14,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 21:16:14,786 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:14,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:14,792 INFO L225 Difference]: With dead ends: 2820 [2021-03-10 21:16:14,792 INFO L226 Difference]: Without dead ends: 2820 [2021-03-10 21:16:14,793 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 783.0ms TimeCoverageRelationStatistics Valid=733, Invalid=2023, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 21:16:14,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-03-10 21:16:14,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 1244. [2021-03-10 21:16:14,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 3.423974255832663) internal successors, (4256), 1243 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:14,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4256 transitions. [2021-03-10 21:16:14,843 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4256 transitions. Word has length 21 [2021-03-10 21:16:14,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:14,843 INFO L480 AbstractCegarLoop]: Abstraction has 1244 states and 4256 transitions. [2021-03-10 21:16:14,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:14,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4256 transitions. [2021-03-10 21:16:14,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:14,846 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:14,846 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:15,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 21:16:15,059 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:15,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:15,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1149753510, now seen corresponding path program 14 times [2021-03-10 21:16:15,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:15,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480667823] [2021-03-10 21:16:15,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:15,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480667823] [2021-03-10 21:16:15,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112266522] [2021-03-10 21:16:15,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:16:15,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:15,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:15,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:15,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:15,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:15,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:15,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399339310] [2021-03-10 21:16:15,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:15,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:15,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:15,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:15,240 INFO L87 Difference]: Start difference. First operand 1244 states and 4256 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:15,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:15,993 INFO L93 Difference]: Finished difference Result 2539 states and 7790 transitions. [2021-03-10 21:16:15,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 21:16:15,993 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:15,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:15,998 INFO L225 Difference]: With dead ends: 2539 [2021-03-10 21:16:15,998 INFO L226 Difference]: Without dead ends: 2539 [2021-03-10 21:16:15,999 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 508.5ms TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:16:16,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-03-10 21:16:16,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 1261. [2021-03-10 21:16:16,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.4063492063492062) internal successors, (4292), 1260 states have internal predecessors, (4292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:16,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4292 transitions. [2021-03-10 21:16:16,032 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4292 transitions. Word has length 21 [2021-03-10 21:16:16,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:16,032 INFO L480 AbstractCegarLoop]: Abstraction has 1261 states and 4292 transitions. [2021-03-10 21:16:16,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:16,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4292 transitions. [2021-03-10 21:16:16,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:16,035 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:16,035 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:16,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 21:16:16,258 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:16,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:16,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1698531494, now seen corresponding path program 15 times [2021-03-10 21:16:16,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:16,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706483225] [2021-03-10 21:16:16,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:16,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706483225] [2021-03-10 21:16:16,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140790216] [2021-03-10 21:16:16,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:16:16,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:16:16,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:16,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:16,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:16,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:16,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:16,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338793689] [2021-03-10 21:16:16,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:16,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:16,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:16,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:16,464 INFO L87 Difference]: Start difference. First operand 1261 states and 4292 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:17,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:17,033 INFO L93 Difference]: Finished difference Result 2197 states and 6773 transitions. [2021-03-10 21:16:17,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:16:17,033 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:17,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:17,036 INFO L225 Difference]: With dead ends: 2197 [2021-03-10 21:16:17,036 INFO L226 Difference]: Without dead ends: 2176 [2021-03-10 21:16:17,037 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 410.3ms TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:16:17,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-03-10 21:16:17,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1281. [2021-03-10 21:16:17,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 3.41640625) internal successors, (4373), 1280 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:17,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 4373 transitions. [2021-03-10 21:16:17,064 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 4373 transitions. Word has length 21 [2021-03-10 21:16:17,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:17,064 INFO L480 AbstractCegarLoop]: Abstraction has 1281 states and 4373 transitions. [2021-03-10 21:16:17,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:17,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 4373 transitions. [2021-03-10 21:16:17,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:17,067 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:17,067 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:17,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:17,273 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:17,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:17,274 INFO L82 PathProgramCache]: Analyzing trace with hash -593936802, now seen corresponding path program 16 times [2021-03-10 21:16:17,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:17,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175757164] [2021-03-10 21:16:17,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:17,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175757164] [2021-03-10 21:16:17,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177735180] [2021-03-10 21:16:17,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:17,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:17,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:17,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:17,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:17,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:17,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:17,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131205338] [2021-03-10 21:16:17,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:17,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:17,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:17,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:17,430 INFO L87 Difference]: Start difference. First operand 1281 states and 4373 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-03-10 21:16:18,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:18,067 INFO L93 Difference]: Finished difference Result 2278 states and 7025 transitions. [2021-03-10 21:16:18,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:16:18,068 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 [2021-03-10 21:16:18,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:18,071 INFO L225 Difference]: With dead ends: 2278 [2021-03-10 21:16:18,071 INFO L226 Difference]: Without dead ends: 2278 [2021-03-10 21:16:18,072 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 455.7ms TimeCoverageRelationStatistics Valid=445, Invalid=1115, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:16:18,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-03-10 21:16:18,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 1234. [2021-03-10 21:16:18,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 3.4184914841849148) internal successors, (4215), 1233 states have internal predecessors, (4215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:18,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 4215 transitions. [2021-03-10 21:16:18,098 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 4215 transitions. Word has length 21 [2021-03-10 21:16:18,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:18,098 INFO L480 AbstractCegarLoop]: Abstraction has 1234 states and 4215 transitions. [2021-03-10 21:16:18,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-03-10 21:16:18,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 4215 transitions. [2021-03-10 21:16:18,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:18,101 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:18,101 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:18,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-10 21:16:18,303 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:18,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:18,303 INFO L82 PathProgramCache]: Analyzing trace with hash 310598484, now seen corresponding path program 17 times [2021-03-10 21:16:18,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:18,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273577389] [2021-03-10 21:16:18,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:18,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273577389] [2021-03-10 21:16:18,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018712369] [2021-03-10 21:16:18,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:18,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:16:18,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:18,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:16:18,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:18,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:18,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-03-10 21:16:18,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124831471] [2021-03-10 21:16:18,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:16:18,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:18,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:16:18,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:16:18,426 INFO L87 Difference]: Start difference. First operand 1234 states and 4215 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:18,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:18,584 INFO L93 Difference]: Finished difference Result 2607 states and 8438 transitions. [2021-03-10 21:16:18,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:16:18,589 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:18,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:18,593 INFO L225 Difference]: With dead ends: 2607 [2021-03-10 21:16:18,593 INFO L226 Difference]: Without dead ends: 2607 [2021-03-10 21:16:18,594 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:16:18,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-03-10 21:16:18,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1625. [2021-03-10 21:16:18,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.5086206896551726) internal successors, (5698), 1624 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:18,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5698 transitions. [2021-03-10 21:16:18,622 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5698 transitions. Word has length 21 [2021-03-10 21:16:18,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:18,622 INFO L480 AbstractCegarLoop]: Abstraction has 1625 states and 5698 transitions. [2021-03-10 21:16:18,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:18,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5698 transitions. [2021-03-10 21:16:18,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:18,625 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:18,625 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:18,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:18,835 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:18,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:18,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1830655388, now seen corresponding path program 18 times [2021-03-10 21:16:18,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:18,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87089830] [2021-03-10 21:16:18,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:18,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87089830] [2021-03-10 21:16:18,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755657058] [2021-03-10 21:16:18,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:18,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:16:18,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:18,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:16:18,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:18,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:18,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-03-10 21:16:18,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184331681] [2021-03-10 21:16:18,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:16:18,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:18,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:16:18,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:16:18,940 INFO L87 Difference]: Start difference. First operand 1625 states and 5698 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:19,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:19,065 INFO L93 Difference]: Finished difference Result 2392 states and 7815 transitions. [2021-03-10 21:16:19,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:16:19,065 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:19,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:19,069 INFO L225 Difference]: With dead ends: 2392 [2021-03-10 21:16:19,070 INFO L226 Difference]: Without dead ends: 2384 [2021-03-10 21:16:19,071 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:16:19,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-03-10 21:16:19,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 1625. [2021-03-10 21:16:19,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.5043103448275863) internal successors, (5691), 1624 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:19,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5691 transitions. [2021-03-10 21:16:19,108 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5691 transitions. Word has length 21 [2021-03-10 21:16:19,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:19,108 INFO L480 AbstractCegarLoop]: Abstraction has 1625 states and 5691 transitions. [2021-03-10 21:16:19,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:19,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5691 transitions. [2021-03-10 21:16:19,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:19,111 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:19,111 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:19,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 21:16:19,327 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:19,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:19,327 INFO L82 PathProgramCache]: Analyzing trace with hash -981176970, now seen corresponding path program 19 times [2021-03-10 21:16:19,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:19,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132023650] [2021-03-10 21:16:19,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:19,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:19,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132023650] [2021-03-10 21:16:19,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082876472] [2021-03-10 21:16:19,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:16:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:19,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:16:19,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:19,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:19,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-03-10 21:16:19,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596739488] [2021-03-10 21:16:19,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:16:19,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:19,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:16:19,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:16:19,447 INFO L87 Difference]: Start difference. First operand 1625 states and 5691 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:19,600 INFO L93 Difference]: Finished difference Result 2370 states and 7737 transitions. [2021-03-10 21:16:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:16:19,600 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:19,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:19,603 INFO L225 Difference]: With dead ends: 2370 [2021-03-10 21:16:19,603 INFO L226 Difference]: Without dead ends: 2348 [2021-03-10 21:16:19,604 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:16:19,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-03-10 21:16:19,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1669. [2021-03-10 21:16:19,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.4820143884892087) internal successors, (5808), 1668 states have internal predecessors, (5808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:19,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5808 transitions. [2021-03-10 21:16:19,636 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5808 transitions. Word has length 21 [2021-03-10 21:16:19,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:19,636 INFO L480 AbstractCegarLoop]: Abstraction has 1669 states and 5808 transitions. [2021-03-10 21:16:19,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:19,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5808 transitions. [2021-03-10 21:16:19,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:19,640 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:19,640 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:19,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-03-10 21:16:19,859 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:19,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:19,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1028833576, now seen corresponding path program 1 times [2021-03-10 21:16:19,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:19,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377207178] [2021-03-10 21:16:19,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:19,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377207178] [2021-03-10 21:16:19,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279879882] [2021-03-10 21:16:19,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-03-10 21:16:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:19,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:19,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:20,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:20,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:20,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:20,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640794625] [2021-03-10 21:16:20,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:20,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:20,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:20,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:20,040 INFO L87 Difference]: Start difference. First operand 1669 states and 5808 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:20,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:20,396 INFO L93 Difference]: Finished difference Result 1877 states and 6328 transitions. [2021-03-10 21:16:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:16:20,396 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:20,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:20,398 INFO L225 Difference]: With dead ends: 1877 [2021-03-10 21:16:20,398 INFO L226 Difference]: Without dead ends: 1877 [2021-03-10 21:16:20,399 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 293.5ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:16:20,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-03-10 21:16:20,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1705. [2021-03-10 21:16:20,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.473004694835681) internal successors, (5918), 1704 states have internal predecessors, (5918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:20,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5918 transitions. [2021-03-10 21:16:20,420 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5918 transitions. Word has length 21 [2021-03-10 21:16:20,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:20,420 INFO L480 AbstractCegarLoop]: Abstraction has 1705 states and 5918 transitions. [2021-03-10 21:16:20,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:20,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5918 transitions. [2021-03-10 21:16:20,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:20,424 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:20,424 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:20,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 21:16:20,629 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:20,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:20,630 INFO L82 PathProgramCache]: Analyzing trace with hash -856277916, now seen corresponding path program 2 times [2021-03-10 21:16:20,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:20,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557682406] [2021-03-10 21:16:20,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:20,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557682406] [2021-03-10 21:16:20,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668450932] [2021-03-10 21:16:20,664 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 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 [2021-03-10 21:16:20,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:20,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:20,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:16:20,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:20,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:20,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 21:16:20,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602318258] [2021-03-10 21:16:20,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:16:20,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:20,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:16:20,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:16:20,750 INFO L87 Difference]: Start difference. First operand 1705 states and 5918 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:20,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:20,875 INFO L93 Difference]: Finished difference Result 2649 states and 8845 transitions. [2021-03-10 21:16:20,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:16:20,875 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:20,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:20,880 INFO L225 Difference]: With dead ends: 2649 [2021-03-10 21:16:20,880 INFO L226 Difference]: Without dead ends: 2637 [2021-03-10 21:16:20,881 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:16:20,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-03-10 21:16:20,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1869. [2021-03-10 21:16:20,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 3.506423982869379) internal successors, (6550), 1868 states have internal predecessors, (6550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:20,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 6550 transitions. [2021-03-10 21:16:20,920 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 6550 transitions. Word has length 21 [2021-03-10 21:16:20,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:20,920 INFO L480 AbstractCegarLoop]: Abstraction has 1869 states and 6550 transitions. [2021-03-10 21:16:20,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:20,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 6550 transitions. [2021-03-10 21:16:20,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:20,924 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:20,924 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:21,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 21:16:21,146 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:21,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:21,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1477091936, now seen corresponding path program 3 times [2021-03-10 21:16:21,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:21,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223581733] [2021-03-10 21:16:21,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:21,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223581733] [2021-03-10 21:16:21,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235961466] [2021-03-10 21:16:21,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:16:21,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:16:21,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:21,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:21,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:21,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:21,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:21,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532651521] [2021-03-10 21:16:21,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:21,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:21,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:21,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:21,293 INFO L87 Difference]: Start difference. First operand 1869 states and 6550 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:21,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:21,734 INFO L93 Difference]: Finished difference Result 2373 states and 7764 transitions. [2021-03-10 21:16:21,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:16:21,734 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:21,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:21,738 INFO L225 Difference]: With dead ends: 2373 [2021-03-10 21:16:21,738 INFO L226 Difference]: Without dead ends: 2365 [2021-03-10 21:16:21,738 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 347.6ms TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:16:21,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-03-10 21:16:21,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 1911. [2021-03-10 21:16:21,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.498952879581152) internal successors, (6683), 1910 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:21,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 6683 transitions. [2021-03-10 21:16:21,772 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 6683 transitions. Word has length 21 [2021-03-10 21:16:21,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:21,772 INFO L480 AbstractCegarLoop]: Abstraction has 1911 states and 6683 transitions. [2021-03-10 21:16:21,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:21,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 6683 transitions. [2021-03-10 21:16:21,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:21,776 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:21,776 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:21,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 21:16:21,991 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:21,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:21,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1043981668, now seen corresponding path program 4 times [2021-03-10 21:16:21,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:21,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677272081] [2021-03-10 21:16:21,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:22,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677272081] [2021-03-10 21:16:22,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707736945] [2021-03-10 21:16:22,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:22,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:22,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:22,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:16:22,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:22,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:22,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-03-10 21:16:22,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590026201] [2021-03-10 21:16:22,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:16:22,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:22,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:16:22,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:16:22,138 INFO L87 Difference]: Start difference. First operand 1911 states and 6683 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-03-10 21:16:22,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:22,271 INFO L93 Difference]: Finished difference Result 3232 states and 10628 transitions. [2021-03-10 21:16:22,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:16:22,272 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 [2021-03-10 21:16:22,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:22,276 INFO L225 Difference]: With dead ends: 3232 [2021-03-10 21:16:22,276 INFO L226 Difference]: Without dead ends: 3232 [2021-03-10 21:16:22,276 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:16:22,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-03-10 21:16:22,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 1914. [2021-03-10 21:16:22,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 3.4913748039728176) internal successors, (6679), 1913 states have internal predecessors, (6679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:22,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 6679 transitions. [2021-03-10 21:16:22,310 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 6679 transitions. Word has length 21 [2021-03-10 21:16:22,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:22,310 INFO L480 AbstractCegarLoop]: Abstraction has 1914 states and 6679 transitions. [2021-03-10 21:16:22,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-03-10 21:16:22,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 6679 transitions. [2021-03-10 21:16:22,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:22,314 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:22,314 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:22,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:22,534 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:22,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1350216288, now seen corresponding path program 5 times [2021-03-10 21:16:22,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:22,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965591476] [2021-03-10 21:16:22,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:22,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965591476] [2021-03-10 21:16:22,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141994810] [2021-03-10 21:16:22,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:22,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:22,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:22,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:22,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:22,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:22,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:22,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99036988] [2021-03-10 21:16:22,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:22,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:22,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:22,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:22,703 INFO L87 Difference]: Start difference. First operand 1914 states and 6679 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:23,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:23,101 INFO L93 Difference]: Finished difference Result 2236 states and 7415 transitions. [2021-03-10 21:16:23,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:16:23,102 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:23,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:23,105 INFO L225 Difference]: With dead ends: 2236 [2021-03-10 21:16:23,105 INFO L226 Difference]: Without dead ends: 2222 [2021-03-10 21:16:23,105 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 285.7ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:16:23,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-03-10 21:16:23,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1921. [2021-03-10 21:16:23,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 3.4854166666666666) internal successors, (6692), 1920 states have internal predecessors, (6692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:23,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 6692 transitions. [2021-03-10 21:16:23,130 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 6692 transitions. Word has length 21 [2021-03-10 21:16:23,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:23,130 INFO L480 AbstractCegarLoop]: Abstraction has 1921 states and 6692 transitions. [2021-03-10 21:16:23,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:23,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 6692 transitions. [2021-03-10 21:16:23,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:23,133 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:23,133 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:23,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 21:16:23,334 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:23,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:23,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1951571416, now seen corresponding path program 6 times [2021-03-10 21:16:23,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:23,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454443699] [2021-03-10 21:16:23,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:23,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:23,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454443699] [2021-03-10 21:16:23,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396969009] [2021-03-10 21:16:23,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:23,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:16:23,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:23,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:16:23,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:23,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:23,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 21:16:23,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241731868] [2021-03-10 21:16:23,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:16:23,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:23,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:16:23,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:16:23,473 INFO L87 Difference]: Start difference. First operand 1921 states and 6692 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:23,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:23,652 INFO L93 Difference]: Finished difference Result 3168 states and 10573 transitions. [2021-03-10 21:16:23,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:16:23,653 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:23,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:23,657 INFO L225 Difference]: With dead ends: 3168 [2021-03-10 21:16:23,657 INFO L226 Difference]: Without dead ends: 3168 [2021-03-10 21:16:23,657 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:23,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2021-03-10 21:16:23,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 2167. [2021-03-10 21:16:23,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 3.5036934441366574) internal successors, (7589), 2166 states have internal predecessors, (7589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:23,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 7589 transitions. [2021-03-10 21:16:23,693 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 7589 transitions. Word has length 21 [2021-03-10 21:16:23,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:23,693 INFO L480 AbstractCegarLoop]: Abstraction has 2167 states and 7589 transitions. [2021-03-10 21:16:23,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:23,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 7589 transitions. [2021-03-10 21:16:23,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:23,698 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:23,698 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:23,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 21:16:23,911 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:23,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:23,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1401139628, now seen corresponding path program 7 times [2021-03-10 21:16:23,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:23,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144142776] [2021-03-10 21:16:23,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:23,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144142776] [2021-03-10 21:16:23,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577127501] [2021-03-10 21:16:23,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:23,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:23,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:23,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:24,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:24,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:24,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085835610] [2021-03-10 21:16:24,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:24,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:24,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:24,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:24,071 INFO L87 Difference]: Start difference. First operand 2167 states and 7589 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:24,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:24,370 INFO L93 Difference]: Finished difference Result 2425 states and 8213 transitions. [2021-03-10 21:16:24,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:16:24,370 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:24,373 INFO L225 Difference]: With dead ends: 2425 [2021-03-10 21:16:24,374 INFO L226 Difference]: Without dead ends: 2400 [2021-03-10 21:16:24,374 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 244.9ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:16:24,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-03-10 21:16:24,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2195. [2021-03-10 21:16:24,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 3.4963536918869647) internal successors, (7671), 2194 states have internal predecessors, (7671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:24,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 7671 transitions. [2021-03-10 21:16:24,414 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 7671 transitions. Word has length 21 [2021-03-10 21:16:24,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:24,414 INFO L480 AbstractCegarLoop]: Abstraction has 2195 states and 7671 transitions. [2021-03-10 21:16:24,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:24,414 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 7671 transitions. [2021-03-10 21:16:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:24,418 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:24,419 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:24,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:24,627 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:24,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:24,627 INFO L82 PathProgramCache]: Analyzing trace with hash 727013536, now seen corresponding path program 4 times [2021-03-10 21:16:24,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:24,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862892296] [2021-03-10 21:16:24,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:24,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862892296] [2021-03-10 21:16:24,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725427958] [2021-03-10 21:16:24,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:16:24,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:24,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:24,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:16:24,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:24,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:24,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 21:16:24,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373536173] [2021-03-10 21:16:24,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:16:24,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:24,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:16:24,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:16:24,813 INFO L87 Difference]: Start difference. First operand 2195 states and 7671 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:25,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:25,125 INFO L93 Difference]: Finished difference Result 2917 states and 9926 transitions. [2021-03-10 21:16:25,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:16:25,126 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:25,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:25,129 INFO L225 Difference]: With dead ends: 2917 [2021-03-10 21:16:25,129 INFO L226 Difference]: Without dead ends: 2917 [2021-03-10 21:16:25,129 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 250.3ms TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:16:25,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-03-10 21:16:25,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2153. [2021-03-10 21:16:25,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 3.4990706319702602) internal successors, (7530), 2152 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:25,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 7530 transitions. [2021-03-10 21:16:25,156 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 7530 transitions. Word has length 21 [2021-03-10 21:16:25,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:25,156 INFO L480 AbstractCegarLoop]: Abstraction has 2153 states and 7530 transitions. [2021-03-10 21:16:25,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 7530 transitions. [2021-03-10 21:16:25,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:25,159 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:25,159 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:25,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-03-10 21:16:25,360 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:25,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:25,360 INFO L82 PathProgramCache]: Analyzing trace with hash 224706792, now seen corresponding path program 5 times [2021-03-10 21:16:25,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:25,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772745803] [2021-03-10 21:16:25,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:25,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772745803] [2021-03-10 21:16:25,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177689105] [2021-03-10 21:16:25,409 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 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 [2021-03-10 21:16:25,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:16:25,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:25,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:16:25,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:25,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:25,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 21:16:25,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779637430] [2021-03-10 21:16:25,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:16:25,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:25,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:16:25,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:16:25,516 INFO L87 Difference]: Start difference. First operand 2153 states and 7530 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:26,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:26,019 INFO L93 Difference]: Finished difference Result 3352 states and 11295 transitions. [2021-03-10 21:16:26,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:16:26,021 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:26,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:26,027 INFO L225 Difference]: With dead ends: 3352 [2021-03-10 21:16:26,027 INFO L226 Difference]: Without dead ends: 3352 [2021-03-10 21:16:26,027 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 374.4ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:16:26,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2021-03-10 21:16:26,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 2168. [2021-03-10 21:16:26,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 3.501153668666359) internal successors, (7587), 2167 states have internal predecessors, (7587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:26,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 7587 transitions. [2021-03-10 21:16:26,071 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 7587 transitions. Word has length 21 [2021-03-10 21:16:26,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:26,073 INFO L480 AbstractCegarLoop]: Abstraction has 2168 states and 7587 transitions. [2021-03-10 21:16:26,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:26,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 7587 transitions. [2021-03-10 21:16:26,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:26,077 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:26,077 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:26,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:26,297 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:26,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:26,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1282893464, now seen corresponding path program 8 times [2021-03-10 21:16:26,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:26,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687178930] [2021-03-10 21:16:26,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:26,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687178930] [2021-03-10 21:16:26,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710592390] [2021-03-10 21:16:26,356 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 [2021-03-10 21:16:26,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:26,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:26,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:26,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:26,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:26,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:26,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:26,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112136508] [2021-03-10 21:16:26,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:26,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:26,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:26,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:26,492 INFO L87 Difference]: Start difference. First operand 2168 states and 7587 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:26,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:26,705 INFO L93 Difference]: Finished difference Result 2314 states and 7948 transitions. [2021-03-10 21:16:26,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:16:26,706 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:26,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:26,709 INFO L225 Difference]: With dead ends: 2314 [2021-03-10 21:16:26,710 INFO L226 Difference]: Without dead ends: 2310 [2021-03-10 21:16:26,710 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 178.5ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:26,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-03-10 21:16:26,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 2176. [2021-03-10 21:16:26,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.497471264367816) internal successors, (7607), 2175 states have internal predecessors, (7607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:26,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7607 transitions. [2021-03-10 21:16:26,736 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7607 transitions. Word has length 21 [2021-03-10 21:16:26,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:26,736 INFO L480 AbstractCegarLoop]: Abstraction has 2176 states and 7607 transitions. [2021-03-10 21:16:26,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:26,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7607 transitions. [2021-03-10 21:16:26,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:26,740 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:26,740 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:26,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-03-10 21:16:26,941 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:26,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:26,941 INFO L82 PathProgramCache]: Analyzing trace with hash -834635104, now seen corresponding path program 9 times [2021-03-10 21:16:26,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:26,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123130614] [2021-03-10 21:16:26,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:26,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:26,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123130614] [2021-03-10 21:16:26,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786257665] [2021-03-10 21:16:26,980 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 [2021-03-10 21:16:26,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:16:26,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:26,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:26,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:27,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:27,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:27,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798140710] [2021-03-10 21:16:27,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:27,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:27,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:27,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:27,090 INFO L87 Difference]: Start difference. First operand 2176 states and 7607 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:27,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:27,379 INFO L93 Difference]: Finished difference Result 2505 states and 8386 transitions. [2021-03-10 21:16:27,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:16:27,379 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:27,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:27,383 INFO L225 Difference]: With dead ends: 2505 [2021-03-10 21:16:27,383 INFO L226 Difference]: Without dead ends: 2501 [2021-03-10 21:16:27,383 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:16:27,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-03-10 21:16:27,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2176. [2021-03-10 21:16:27,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.497471264367816) internal successors, (7607), 2175 states have internal predecessors, (7607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:27,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7607 transitions. [2021-03-10 21:16:27,410 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7607 transitions. Word has length 21 [2021-03-10 21:16:27,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:27,410 INFO L480 AbstractCegarLoop]: Abstraction has 2176 states and 7607 transitions. [2021-03-10 21:16:27,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:27,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7607 transitions. [2021-03-10 21:16:27,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:27,413 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:27,413 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:27,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-03-10 21:16:27,613 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:27,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:27,614 INFO L82 PathProgramCache]: Analyzing trace with hash -961510752, now seen corresponding path program 10 times [2021-03-10 21:16:27,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:27,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413506155] [2021-03-10 21:16:27,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:27,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413506155] [2021-03-10 21:16:27,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44341849] [2021-03-10 21:16:27,653 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 [2021-03-10 21:16:27,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:27,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:27,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:27,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:27,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:27,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:27,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:27,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621492906] [2021-03-10 21:16:27,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:27,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:27,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:27,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:27,797 INFO L87 Difference]: Start difference. First operand 2176 states and 7607 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:28,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:28,084 INFO L93 Difference]: Finished difference Result 2440 states and 8233 transitions. [2021-03-10 21:16:28,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:16:28,085 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:28,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:28,088 INFO L225 Difference]: With dead ends: 2440 [2021-03-10 21:16:28,088 INFO L226 Difference]: Without dead ends: 2433 [2021-03-10 21:16:28,088 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:16:28,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-03-10 21:16:28,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 2160. [2021-03-10 21:16:28,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 2159 states have (on average 3.5030106530801297) internal successors, (7563), 2159 states have internal predecessors, (7563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:28,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 7563 transitions. [2021-03-10 21:16:28,114 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 7563 transitions. Word has length 21 [2021-03-10 21:16:28,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:28,114 INFO L480 AbstractCegarLoop]: Abstraction has 2160 states and 7563 transitions. [2021-03-10 21:16:28,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:28,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 7563 transitions. [2021-03-10 21:16:28,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:28,118 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:28,118 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:28,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-10 21:16:28,318 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:28,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:28,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1953121252, now seen corresponding path program 11 times [2021-03-10 21:16:28,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:28,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733402135] [2021-03-10 21:16:28,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:28,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733402135] [2021-03-10 21:16:28,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781289506] [2021-03-10 21:16:28,375 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 [2021-03-10 21:16:28,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:16:28,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:28,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:28,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:28,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:28,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:28,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307766971] [2021-03-10 21:16:28,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:28,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:28,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:28,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:28,505 INFO L87 Difference]: Start difference. First operand 2160 states and 7563 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:28,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:28,729 INFO L93 Difference]: Finished difference Result 2267 states and 7828 transitions. [2021-03-10 21:16:28,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:16:28,730 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:28,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:28,733 INFO L225 Difference]: With dead ends: 2267 [2021-03-10 21:16:28,733 INFO L226 Difference]: Without dead ends: 2263 [2021-03-10 21:16:28,733 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:16:28,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-03-10 21:16:28,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2142. [2021-03-10 21:16:28,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 3.505838393274171) internal successors, (7506), 2141 states have internal predecessors, (7506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:28,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 7506 transitions. [2021-03-10 21:16:28,770 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 7506 transitions. Word has length 21 [2021-03-10 21:16:28,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:28,770 INFO L480 AbstractCegarLoop]: Abstraction has 2142 states and 7506 transitions. [2021-03-10 21:16:28,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:28,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 7506 transitions. [2021-03-10 21:16:28,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:28,773 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:28,773 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:28,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-03-10 21:16:28,974 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:28,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:28,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1895235168, now seen corresponding path program 6 times [2021-03-10 21:16:28,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:28,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832014553] [2021-03-10 21:16:28,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:29,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832014553] [2021-03-10 21:16:29,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083558199] [2021-03-10 21:16:29,013 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 [2021-03-10 21:16:29,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:16:29,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:29,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:16:29,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:29,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:29,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 21:16:29,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921120955] [2021-03-10 21:16:29,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:16:29,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:29,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:16:29,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:16:29,134 INFO L87 Difference]: Start difference. First operand 2142 states and 7506 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:29,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:29,381 INFO L93 Difference]: Finished difference Result 3127 states and 10480 transitions. [2021-03-10 21:16:29,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:16:29,382 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:29,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:29,386 INFO L225 Difference]: With dead ends: 3127 [2021-03-10 21:16:29,386 INFO L226 Difference]: Without dead ends: 3117 [2021-03-10 21:16:29,386 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 193.1ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:16:29,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2021-03-10 21:16:29,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 2142. [2021-03-10 21:16:29,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 3.500233535730967) internal successors, (7494), 2141 states have internal predecessors, (7494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 7494 transitions. [2021-03-10 21:16:29,429 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 7494 transitions. Word has length 21 [2021-03-10 21:16:29,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:29,429 INFO L480 AbstractCegarLoop]: Abstraction has 2142 states and 7494 transitions. [2021-03-10 21:16:29,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:29,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 7494 transitions. [2021-03-10 21:16:29,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:29,432 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:29,432 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:29,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:29,633 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:29,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:29,633 INFO L82 PathProgramCache]: Analyzing trace with hash -940636012, now seen corresponding path program 12 times [2021-03-10 21:16:29,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:29,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533914615] [2021-03-10 21:16:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:29,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533914615] [2021-03-10 21:16:29,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785637081] [2021-03-10 21:16:29,663 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 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 [2021-03-10 21:16:29,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:16:29,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:29,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:29,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:29,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:29,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:29,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336893912] [2021-03-10 21:16:29,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:29,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:29,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:29,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:29,771 INFO L87 Difference]: Start difference. First operand 2142 states and 7494 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:30,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:30,138 INFO L93 Difference]: Finished difference Result 2611 states and 8731 transitions. [2021-03-10 21:16:30,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:16:30,139 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:30,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:30,142 INFO L225 Difference]: With dead ends: 2611 [2021-03-10 21:16:30,142 INFO L226 Difference]: Without dead ends: 2586 [2021-03-10 21:16:30,143 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 283.0ms TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:16:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-03-10 21:16:30,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 2140. [2021-03-10 21:16:30,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 3.5002337540906967) internal successors, (7487), 2139 states have internal predecessors, (7487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:30,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 7487 transitions. [2021-03-10 21:16:30,199 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 7487 transitions. Word has length 21 [2021-03-10 21:16:30,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:30,199 INFO L480 AbstractCegarLoop]: Abstraction has 2140 states and 7487 transitions. [2021-03-10 21:16:30,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:30,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 7487 transitions. [2021-03-10 21:16:30,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:30,202 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:30,202 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:30,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-10 21:16:30,403 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:30,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:30,403 INFO L82 PathProgramCache]: Analyzing trace with hash -121296748, now seen corresponding path program 13 times [2021-03-10 21:16:30,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:30,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896937091] [2021-03-10 21:16:30,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:30,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896937091] [2021-03-10 21:16:30,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288006439] [2021-03-10 21:16:30,435 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 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 [2021-03-10 21:16:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:30,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:30,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:30,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:30,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:30,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710510548] [2021-03-10 21:16:30,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:30,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:30,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:30,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:30,560 INFO L87 Difference]: Start difference. First operand 2140 states and 7487 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:30,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:30,944 INFO L93 Difference]: Finished difference Result 2721 states and 9012 transitions. [2021-03-10 21:16:30,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:16:30,945 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:30,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:30,948 INFO L225 Difference]: With dead ends: 2721 [2021-03-10 21:16:30,948 INFO L226 Difference]: Without dead ends: 2696 [2021-03-10 21:16:30,949 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 291.4ms TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:16:30,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-03-10 21:16:30,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2163. [2021-03-10 21:16:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 3.4930619796484734) internal successors, (7552), 2162 states have internal predecessors, (7552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 7552 transitions. [2021-03-10 21:16:30,981 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 7552 transitions. Word has length 21 [2021-03-10 21:16:30,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:30,981 INFO L480 AbstractCegarLoop]: Abstraction has 2163 states and 7552 transitions. [2021-03-10 21:16:30,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:30,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 7552 transitions. [2021-03-10 21:16:30,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:30,984 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:30,984 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:31,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 21:16:31,185 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:31,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:31,185 INFO L82 PathProgramCache]: Analyzing trace with hash 412592784, now seen corresponding path program 14 times [2021-03-10 21:16:31,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:31,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60888287] [2021-03-10 21:16:31,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:31,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60888287] [2021-03-10 21:16:31,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752973316] [2021-03-10 21:16:31,216 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 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 [2021-03-10 21:16:31,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:31,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:31,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:31,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:31,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:31,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:31,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976577304] [2021-03-10 21:16:31,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:31,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:31,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:31,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:31,325 INFO L87 Difference]: Start difference. First operand 2163 states and 7552 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:31,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:31,934 INFO L93 Difference]: Finished difference Result 3206 states and 10297 transitions. [2021-03-10 21:16:31,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:16:31,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:31,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:31,939 INFO L225 Difference]: With dead ends: 3206 [2021-03-10 21:16:31,939 INFO L226 Difference]: Without dead ends: 3185 [2021-03-10 21:16:31,939 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 429.4ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:16:31,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3185 states. [2021-03-10 21:16:31,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3185 to 2230. [2021-03-10 21:16:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 3.496186630776133) internal successors, (7793), 2229 states have internal predecessors, (7793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:31,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 7793 transitions. [2021-03-10 21:16:31,970 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 7793 transitions. Word has length 21 [2021-03-10 21:16:31,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:31,970 INFO L480 AbstractCegarLoop]: Abstraction has 2230 states and 7793 transitions. [2021-03-10 21:16:31,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:31,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 7793 transitions. [2021-03-10 21:16:31,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:31,974 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:31,974 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:32,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:32,174 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:32,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:32,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1517187476, now seen corresponding path program 15 times [2021-03-10 21:16:32,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:32,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147644489] [2021-03-10 21:16:32,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:32,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147644489] [2021-03-10 21:16:32,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363916869] [2021-03-10 21:16:32,213 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 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 [2021-03-10 21:16:32,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:16:32,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:32,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:32,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:32,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:32,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:32,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104611263] [2021-03-10 21:16:32,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:32,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:32,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:32,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:32,351 INFO L87 Difference]: Start difference. First operand 2230 states and 7793 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-03-10 21:16:33,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:33,176 INFO L93 Difference]: Finished difference Result 3541 states and 11308 transitions. [2021-03-10 21:16:33,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 21:16:33,177 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 [2021-03-10 21:16:33,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:33,181 INFO L225 Difference]: With dead ends: 3541 [2021-03-10 21:16:33,181 INFO L226 Difference]: Without dead ends: 3541 [2021-03-10 21:16:33,181 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 640.7ms TimeCoverageRelationStatistics Valid=572, Invalid=1498, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:16:33,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2021-03-10 21:16:33,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 2190. [2021-03-10 21:16:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.4920054819552306) internal successors, (7644), 2189 states have internal predecessors, (7644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:33,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7644 transitions. [2021-03-10 21:16:33,212 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7644 transitions. Word has length 21 [2021-03-10 21:16:33,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:33,212 INFO L480 AbstractCegarLoop]: Abstraction has 2190 states and 7644 transitions. [2021-03-10 21:16:33,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-03-10 21:16:33,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7644 transitions. [2021-03-10 21:16:33,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:33,215 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:33,215 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:33,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-03-10 21:16:33,416 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:33,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:33,416 INFO L82 PathProgramCache]: Analyzing trace with hash -2061332650, now seen corresponding path program 7 times [2021-03-10 21:16:33,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:33,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575452775] [2021-03-10 21:16:33,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:33,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575452775] [2021-03-10 21:16:33,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907712060] [2021-03-10 21:16:33,451 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 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 [2021-03-10 21:16:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:33,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:16:33,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:33,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:33,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 21:16:33,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477807911] [2021-03-10 21:16:33,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:16:33,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:33,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:16:33,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:16:33,562 INFO L87 Difference]: Start difference. First operand 2190 states and 7644 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:34,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:34,174 INFO L93 Difference]: Finished difference Result 3908 states and 12800 transitions. [2021-03-10 21:16:34,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:16:34,175 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:34,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:34,180 INFO L225 Difference]: With dead ends: 3908 [2021-03-10 21:16:34,180 INFO L226 Difference]: Without dead ends: 3900 [2021-03-10 21:16:34,181 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 498.8ms TimeCoverageRelationStatistics Valid=350, Invalid=982, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:16:34,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3900 states. [2021-03-10 21:16:34,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3900 to 2190. [2021-03-10 21:16:34,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.4901781635449978) internal successors, (7640), 2189 states have internal predecessors, (7640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:34,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7640 transitions. [2021-03-10 21:16:34,227 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7640 transitions. Word has length 21 [2021-03-10 21:16:34,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:34,227 INFO L480 AbstractCegarLoop]: Abstraction has 2190 states and 7640 transitions. [2021-03-10 21:16:34,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:34,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7640 transitions. [2021-03-10 21:16:34,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:34,231 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:34,231 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:34,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:34,447 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:34,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:34,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1082775206, now seen corresponding path program 8 times [2021-03-10 21:16:34,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:34,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535462252] [2021-03-10 21:16:34,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:34,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535462252] [2021-03-10 21:16:34,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401964970] [2021-03-10 21:16:34,485 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 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 [2021-03-10 21:16:34,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:34,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:34,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:16:34,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:34,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:34,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 21:16:34,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745318806] [2021-03-10 21:16:34,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:16:34,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:34,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:16:34,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:16:34,609 INFO L87 Difference]: Start difference. First operand 2190 states and 7640 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:35,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:35,273 INFO L93 Difference]: Finished difference Result 4086 states and 13513 transitions. [2021-03-10 21:16:35,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:16:35,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:35,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:35,279 INFO L225 Difference]: With dead ends: 4086 [2021-03-10 21:16:35,279 INFO L226 Difference]: Without dead ends: 4086 [2021-03-10 21:16:35,280 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 524.0ms TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:16:35,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2021-03-10 21:16:35,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 2190. [2021-03-10 21:16:35,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.4901781635449978) internal successors, (7640), 2189 states have internal predecessors, (7640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:35,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7640 transitions. [2021-03-10 21:16:35,314 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7640 transitions. Word has length 21 [2021-03-10 21:16:35,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:35,314 INFO L480 AbstractCegarLoop]: Abstraction has 2190 states and 7640 transitions. [2021-03-10 21:16:35,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:35,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7640 transitions. [2021-03-10 21:16:35,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:35,317 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:35,317 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:35,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-03-10 21:16:35,517 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:35,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:35,518 INFO L82 PathProgramCache]: Analyzing trace with hash 939943326, now seen corresponding path program 9 times [2021-03-10 21:16:35,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:35,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570714318] [2021-03-10 21:16:35,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:35,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570714318] [2021-03-10 21:16:35,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421828923] [2021-03-10 21:16:35,558 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 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 [2021-03-10 21:16:35,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:16:35,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:35,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:16:35,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:35,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:35,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 21:16:35,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74773561] [2021-03-10 21:16:35,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:16:35,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:35,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:16:35,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:16:35,656 INFO L87 Difference]: Start difference. First operand 2190 states and 7640 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:36,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:36,054 INFO L93 Difference]: Finished difference Result 3342 states and 11093 transitions. [2021-03-10 21:16:36,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:16:36,055 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:36,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:36,059 INFO L225 Difference]: With dead ends: 3342 [2021-03-10 21:16:36,059 INFO L226 Difference]: Without dead ends: 3334 [2021-03-10 21:16:36,059 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 297.4ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:16:36,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-03-10 21:16:36,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2186. [2021-03-10 21:16:36,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2186 states, 2185 states have (on average 3.491075514874142) internal successors, (7628), 2185 states have internal predecessors, (7628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2186 states to 2186 states and 7628 transitions. [2021-03-10 21:16:36,105 INFO L78 Accepts]: Start accepts. Automaton has 2186 states and 7628 transitions. Word has length 21 [2021-03-10 21:16:36,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:36,106 INFO L480 AbstractCegarLoop]: Abstraction has 2186 states and 7628 transitions. [2021-03-10 21:16:36,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:36,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2186 states and 7628 transitions. [2021-03-10 21:16:36,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:36,110 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:36,110 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:36,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:36,323 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:36,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:36,323 INFO L82 PathProgramCache]: Analyzing trace with hash -2053845986, now seen corresponding path program 10 times [2021-03-10 21:16:36,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:36,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125102376] [2021-03-10 21:16:36,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:36,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125102376] [2021-03-10 21:16:36,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183070742] [2021-03-10 21:16:36,360 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 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 [2021-03-10 21:16:36,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:36,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:36,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:16:36,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:36,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:36,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 21:16:36,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758104465] [2021-03-10 21:16:36,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:16:36,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:36,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:16:36,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:16:36,463 INFO L87 Difference]: Start difference. First operand 2186 states and 7628 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:36,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:36,759 INFO L93 Difference]: Finished difference Result 3190 states and 10635 transitions. [2021-03-10 21:16:36,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:16:36,759 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:36,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:36,764 INFO L225 Difference]: With dead ends: 3190 [2021-03-10 21:16:36,764 INFO L226 Difference]: Without dead ends: 3178 [2021-03-10 21:16:36,764 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 233.0ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:16:36,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3178 states. [2021-03-10 21:16:36,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3178 to 2184. [2021-03-10 21:16:36,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2184 states, 2183 states have (on average 3.4924415941365092) internal successors, (7624), 2183 states have internal predecessors, (7624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 7624 transitions. [2021-03-10 21:16:36,801 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 7624 transitions. Word has length 21 [2021-03-10 21:16:36,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:36,801 INFO L480 AbstractCegarLoop]: Abstraction has 2184 states and 7624 transitions. [2021-03-10 21:16:36,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:36,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 7624 transitions. [2021-03-10 21:16:36,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:36,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:36,805 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:37,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-03-10 21:16:37,015 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:37,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:37,015 INFO L82 PathProgramCache]: Analyzing trace with hash -2052223966, now seen corresponding path program 11 times [2021-03-10 21:16:37,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:37,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464295952] [2021-03-10 21:16:37,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:37,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464295952] [2021-03-10 21:16:37,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203516361] [2021-03-10 21:16:37,056 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 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 [2021-03-10 21:16:37,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:16:37,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:37,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:16:37,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:37,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:37,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 21:16:37,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961139781] [2021-03-10 21:16:37,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:16:37,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:37,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:16:37,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:16:37,148 INFO L87 Difference]: Start difference. First operand 2184 states and 7624 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:37,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:37,691 INFO L93 Difference]: Finished difference Result 3630 states and 12185 transitions. [2021-03-10 21:16:37,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:16:37,691 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:37,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:37,696 INFO L225 Difference]: With dead ends: 3630 [2021-03-10 21:16:37,696 INFO L226 Difference]: Without dead ends: 3630 [2021-03-10 21:16:37,696 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 419.8ms TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:16:37,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3630 states. [2021-03-10 21:16:37,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3630 to 2175. [2021-03-10 21:16:37,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2174 states have (on average 3.4894204231830726) internal successors, (7586), 2174 states have internal predecessors, (7586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:37,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 7586 transitions. [2021-03-10 21:16:37,725 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 7586 transitions. Word has length 21 [2021-03-10 21:16:37,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:37,726 INFO L480 AbstractCegarLoop]: Abstraction has 2175 states and 7586 transitions. [2021-03-10 21:16:37,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:37,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 7586 transitions. [2021-03-10 21:16:37,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:16:37,728 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:37,728 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:37,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-03-10 21:16:37,929 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:37,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:37,929 INFO L82 PathProgramCache]: Analyzing trace with hash 122801370, now seen corresponding path program 12 times [2021-03-10 21:16:37,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:37,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946221363] [2021-03-10 21:16:37,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:37,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946221363] [2021-03-10 21:16:37,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299948355] [2021-03-10 21:16:37,966 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 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 [2021-03-10 21:16:37,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:16:37,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:37,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:16:37,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:38,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:38,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 21:16:38,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528644734] [2021-03-10 21:16:38,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:16:38,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:38,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:16:38,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:16:38,077 INFO L87 Difference]: Start difference. First operand 2175 states and 7586 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:38,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:38,595 INFO L93 Difference]: Finished difference Result 3456 states and 11495 transitions. [2021-03-10 21:16:38,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:16:38,596 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:16:38,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:38,601 INFO L225 Difference]: With dead ends: 3456 [2021-03-10 21:16:38,601 INFO L226 Difference]: Without dead ends: 3446 [2021-03-10 21:16:38,601 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 421.3ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:16:38,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-03-10 21:16:38,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2166. [2021-03-10 21:16:38,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2166 states, 2165 states have (on average 3.4891454965357966) internal successors, (7554), 2165 states have internal predecessors, (7554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:38,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 7554 transitions. [2021-03-10 21:16:38,643 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 7554 transitions. Word has length 21 [2021-03-10 21:16:38,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:38,643 INFO L480 AbstractCegarLoop]: Abstraction has 2166 states and 7554 transitions. [2021-03-10 21:16:38,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:38,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 7554 transitions. [2021-03-10 21:16:38,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:16:38,646 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:38,646 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:38,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-10 21:16:38,851 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:38,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:38,851 INFO L82 PathProgramCache]: Analyzing trace with hash -791767740, now seen corresponding path program 20 times [2021-03-10 21:16:38,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:38,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058483220] [2021-03-10 21:16:38,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:38,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058483220] [2021-03-10 21:16:38,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897433878] [2021-03-10 21:16:38,928 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:16:38,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:38,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:38,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:16:38,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:39,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:39,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-03-10 21:16:39,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772409017] [2021-03-10 21:16:39,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:16:39,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:39,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:16:39,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:16:39,115 INFO L87 Difference]: Start difference. First operand 2166 states and 7554 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:39,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:39,322 INFO L93 Difference]: Finished difference Result 3313 states and 11224 transitions. [2021-03-10 21:16:39,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:16:39,323 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:16:39,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:39,329 INFO L225 Difference]: With dead ends: 3313 [2021-03-10 21:16:39,329 INFO L226 Difference]: Without dead ends: 3283 [2021-03-10 21:16:39,330 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 174.6ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:16:39,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-03-10 21:16:39,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2707. [2021-03-10 21:16:39,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2706 states have (on average 3.5291943828529195) internal successors, (9550), 2706 states have internal predecessors, (9550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:39,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 9550 transitions. [2021-03-10 21:16:39,380 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 9550 transitions. Word has length 23 [2021-03-10 21:16:39,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:39,380 INFO L480 AbstractCegarLoop]: Abstraction has 2707 states and 9550 transitions. [2021-03-10 21:16:39,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:39,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 9550 transitions. [2021-03-10 21:16:39,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:16:39,385 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:39,385 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:39,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-03-10 21:16:39,599 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:39,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:39,599 INFO L82 PathProgramCache]: Analyzing trace with hash -830121990, now seen corresponding path program 21 times [2021-03-10 21:16:39,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:39,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111418932] [2021-03-10 21:16:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:16:39,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111418932] [2021-03-10 21:16:39,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878972336] [2021-03-10 21:16:39,656 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 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 [2021-03-10 21:16:39,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:16:39,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:39,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:16:39,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:39,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:39,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:39,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037203948] [2021-03-10 21:16:39,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:39,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:39,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:39,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:39,813 INFO L87 Difference]: Start difference. First operand 2707 states and 9550 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:39,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:39,987 INFO L93 Difference]: Finished difference Result 3950 states and 13551 transitions. [2021-03-10 21:16:39,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:16:39,988 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:16:39,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:39,994 INFO L225 Difference]: With dead ends: 3950 [2021-03-10 21:16:39,994 INFO L226 Difference]: Without dead ends: 3891 [2021-03-10 21:16:39,994 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 135.9ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:16:39,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2021-03-10 21:16:40,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 3295. [2021-03-10 21:16:40,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3294 states have (on average 3.552519732847602) internal successors, (11702), 3294 states have internal predecessors, (11702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:40,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 11702 transitions. [2021-03-10 21:16:40,070 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 11702 transitions. Word has length 23 [2021-03-10 21:16:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:40,071 INFO L480 AbstractCegarLoop]: Abstraction has 3295 states and 11702 transitions. [2021-03-10 21:16:40,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:40,071 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 11702 transitions. [2021-03-10 21:16:40,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:16:40,076 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:40,076 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:40,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-10 21:16:40,286 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:40,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:40,286 INFO L82 PathProgramCache]: Analyzing trace with hash -50344256, now seen corresponding path program 13 times [2021-03-10 21:16:40,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:40,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513518497] [2021-03-10 21:16:40,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:40,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513518497] [2021-03-10 21:16:40,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279940378] [2021-03-10 21:16:40,353 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 [2021-03-10 21:16:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:40,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:16:40,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:40,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:40,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:40,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091777542] [2021-03-10 21:16:40,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:40,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:40,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:40,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:40,490 INFO L87 Difference]: Start difference. First operand 3295 states and 11702 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:40,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:40,681 INFO L93 Difference]: Finished difference Result 3639 states and 12726 transitions. [2021-03-10 21:16:40,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:16:40,681 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:16:40,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:40,686 INFO L225 Difference]: With dead ends: 3639 [2021-03-10 21:16:40,686 INFO L226 Difference]: Without dead ends: 3609 [2021-03-10 21:16:40,686 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:16:40,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2021-03-10 21:16:40,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 3359. [2021-03-10 21:16:40,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3359 states, 3358 states have (on average 3.5547945205479454) internal successors, (11937), 3358 states have internal predecessors, (11937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:40,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3359 states to 3359 states and 11937 transitions. [2021-03-10 21:16:40,728 INFO L78 Accepts]: Start accepts. Automaton has 3359 states and 11937 transitions. Word has length 23 [2021-03-10 21:16:40,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:40,728 INFO L480 AbstractCegarLoop]: Abstraction has 3359 states and 11937 transitions. [2021-03-10 21:16:40,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:40,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3359 states and 11937 transitions. [2021-03-10 21:16:40,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:16:40,732 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:40,732 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:40,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-03-10 21:16:40,933 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:40,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:40,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1087752272, now seen corresponding path program 14 times [2021-03-10 21:16:40,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:40,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261256527] [2021-03-10 21:16:40,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:40,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261256527] [2021-03-10 21:16:40,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108806859] [2021-03-10 21:16:40,994 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 [2021-03-10 21:16:41,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:41,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:41,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:16:41,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:41,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:41,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:16:41,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636737996] [2021-03-10 21:16:41,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:16:41,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:41,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:16:41,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:16:41,121 INFO L87 Difference]: Start difference. First operand 3359 states and 11937 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:41,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:41,261 INFO L93 Difference]: Finished difference Result 3651 states and 12785 transitions. [2021-03-10 21:16:41,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:16:41,261 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:16:41,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:41,267 INFO L225 Difference]: With dead ends: 3651 [2021-03-10 21:16:41,267 INFO L226 Difference]: Without dead ends: 3621 [2021-03-10 21:16:41,267 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:16:41,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3621 states. [2021-03-10 21:16:41,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3621 to 3379. [2021-03-10 21:16:41,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3379 states, 3378 states have (on average 3.5509177027827117) internal successors, (11995), 3378 states have internal predecessors, (11995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:41,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3379 states to 3379 states and 11995 transitions. [2021-03-10 21:16:41,344 INFO L78 Accepts]: Start accepts. Automaton has 3379 states and 11995 transitions. Word has length 23 [2021-03-10 21:16:41,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:41,344 INFO L480 AbstractCegarLoop]: Abstraction has 3379 states and 11995 transitions. [2021-03-10 21:16:41,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:41,344 INFO L276 IsEmpty]: Start isEmpty. Operand 3379 states and 11995 transitions. [2021-03-10 21:16:41,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:16:41,350 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:41,350 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:41,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:41,550 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:41,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:41,551 INFO L82 PathProgramCache]: Analyzing trace with hash 964052518, now seen corresponding path program 22 times [2021-03-10 21:16:41,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:41,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914984500] [2021-03-10 21:16:41,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:41,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914984500] [2021-03-10 21:16:41,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963093457] [2021-03-10 21:16:41,609 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 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 [2021-03-10 21:16:41,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:41,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:41,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:16:41,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:41,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:41,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-03-10 21:16:41,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442979873] [2021-03-10 21:16:41,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:16:41,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:41,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:16:41,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:16:41,741 INFO L87 Difference]: Start difference. First operand 3379 states and 11995 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:42,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:42,149 INFO L93 Difference]: Finished difference Result 5445 states and 18470 transitions. [2021-03-10 21:16:42,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:16:42,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:16:42,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:42,158 INFO L225 Difference]: With dead ends: 5445 [2021-03-10 21:16:42,158 INFO L226 Difference]: Without dead ends: 5445 [2021-03-10 21:16:42,159 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 256.9ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:16:42,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5445 states. [2021-03-10 21:16:42,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5445 to 3811. [2021-03-10 21:16:42,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3811 states, 3810 states have (on average 3.5700787401574803) internal successors, (13602), 3810 states have internal predecessors, (13602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 13602 transitions. [2021-03-10 21:16:42,220 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 13602 transitions. Word has length 25 [2021-03-10 21:16:42,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:42,220 INFO L480 AbstractCegarLoop]: Abstraction has 3811 states and 13602 transitions. [2021-03-10 21:16:42,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:42,220 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 13602 transitions. [2021-03-10 21:16:42,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:16:42,226 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:42,226 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:42,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:42,426 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:42,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:42,427 INFO L82 PathProgramCache]: Analyzing trace with hash -717425812, now seen corresponding path program 15 times [2021-03-10 21:16:42,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:42,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941497498] [2021-03-10 21:16:42,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:42,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941497498] [2021-03-10 21:16:42,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225273748] [2021-03-10 21:16:42,474 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 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 [2021-03-10 21:16:42,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:16:42,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:42,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:16:42,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:42,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:42,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:16:42,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972768627] [2021-03-10 21:16:42,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:16:42,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:42,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:16:42,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:16:42,633 INFO L87 Difference]: Start difference. First operand 3811 states and 13602 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:16:43,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:43,057 INFO L93 Difference]: Finished difference Result 5828 states and 20213 transitions. [2021-03-10 21:16:43,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:16:43,057 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-03-10 21:16:43,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:43,065 INFO L225 Difference]: With dead ends: 5828 [2021-03-10 21:16:43,065 INFO L226 Difference]: Without dead ends: 5828 [2021-03-10 21:16:43,066 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 320.4ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:16:43,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5828 states. [2021-03-10 21:16:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5828 to 4033. [2021-03-10 21:16:43,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4033 states, 4032 states have (on average 3.5652281746031744) internal successors, (14375), 4032 states have internal predecessors, (14375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4033 states to 4033 states and 14375 transitions. [2021-03-10 21:16:43,125 INFO L78 Accepts]: Start accepts. Automaton has 4033 states and 14375 transitions. Word has length 25 [2021-03-10 21:16:43,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:43,126 INFO L480 AbstractCegarLoop]: Abstraction has 4033 states and 14375 transitions. [2021-03-10 21:16:43,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:16:43,126 INFO L276 IsEmpty]: Start isEmpty. Operand 4033 states and 14375 transitions. [2021-03-10 21:16:43,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:16:43,131 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:43,131 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:43,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:43,332 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:43,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:43,332 INFO L82 PathProgramCache]: Analyzing trace with hash -242410846, now seen corresponding path program 23 times [2021-03-10 21:16:43,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:43,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134624138] [2021-03-10 21:16:43,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:43,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134624138] [2021-03-10 21:16:43,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664903247] [2021-03-10 21:16:43,382 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 [2021-03-10 21:16:43,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:16:43,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:43,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:16:43,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:43,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:43,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:16:43,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934511391] [2021-03-10 21:16:43,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:16:43,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:43,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:16:43,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:16:43,557 INFO L87 Difference]: Start difference. First operand 4033 states and 14375 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:44,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:44,122 INFO L93 Difference]: Finished difference Result 5115 states and 17619 transitions. [2021-03-10 21:16:44,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:16:44,122 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:16:44,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:44,130 INFO L225 Difference]: With dead ends: 5115 [2021-03-10 21:16:44,130 INFO L226 Difference]: Without dead ends: 5076 [2021-03-10 21:16:44,130 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 491.7ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:16:44,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-03-10 21:16:44,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 4139. [2021-03-10 21:16:44,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 4138 states have (on average 3.5623489608506524) internal successors, (14741), 4138 states have internal predecessors, (14741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:44,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 14741 transitions. [2021-03-10 21:16:44,191 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 14741 transitions. Word has length 25 [2021-03-10 21:16:44,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:44,191 INFO L480 AbstractCegarLoop]: Abstraction has 4139 states and 14741 transitions. [2021-03-10 21:16:44,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:44,191 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 14741 transitions. [2021-03-10 21:16:44,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:16:44,225 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:44,225 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:44,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:44,425 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:44,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:44,426 INFO L82 PathProgramCache]: Analyzing trace with hash -433027746, now seen corresponding path program 24 times [2021-03-10 21:16:44,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:44,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388612148] [2021-03-10 21:16:44,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:44,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388612148] [2021-03-10 21:16:44,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376314464] [2021-03-10 21:16:44,474 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 [2021-03-10 21:16:44,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:16:44,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:44,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:16:44,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:44,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:44,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:16:44,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002188132] [2021-03-10 21:16:44,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:16:44,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:44,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:16:44,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:16:44,675 INFO L87 Difference]: Start difference. First operand 4139 states and 14741 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:46,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:46,604 INFO L93 Difference]: Finished difference Result 9010 states and 29031 transitions. [2021-03-10 21:16:46,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-03-10 21:16:46,604 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:16:46,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:46,617 INFO L225 Difference]: With dead ends: 9010 [2021-03-10 21:16:46,617 INFO L226 Difference]: Without dead ends: 9010 [2021-03-10 21:16:46,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3517 ImplicationChecksByTransitivity, 1558.0ms TimeCoverageRelationStatistics Valid=2336, Invalid=6784, Unknown=0, NotChecked=0, Total=9120 [2021-03-10 21:16:46,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9010 states. [2021-03-10 21:16:46,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9010 to 4688. [2021-03-10 21:16:46,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4688 states, 4687 states have (on average 3.5850224023895882) internal successors, (16803), 4687 states have internal predecessors, (16803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:46,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4688 states to 4688 states and 16803 transitions. [2021-03-10 21:16:46,720 INFO L78 Accepts]: Start accepts. Automaton has 4688 states and 16803 transitions. Word has length 25 [2021-03-10 21:16:46,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:46,720 INFO L480 AbstractCegarLoop]: Abstraction has 4688 states and 16803 transitions. [2021-03-10 21:16:46,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:46,720 INFO L276 IsEmpty]: Start isEmpty. Operand 4688 states and 16803 transitions. [2021-03-10 21:16:46,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:16:46,728 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:46,728 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:46,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-03-10 21:16:46,938 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:46,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:46,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1844695458, now seen corresponding path program 16 times [2021-03-10 21:16:46,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:46,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431565032] [2021-03-10 21:16:46,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:46,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431565032] [2021-03-10 21:16:46,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811047957] [2021-03-10 21:16:46,975 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 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 [2021-03-10 21:16:46,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:46,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:46,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:16:46,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:47,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:47,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:16:47,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741237629] [2021-03-10 21:16:47,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:16:47,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:47,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:16:47,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:16:47,127 INFO L87 Difference]: Start difference. First operand 4688 states and 16803 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:48,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:48,309 INFO L93 Difference]: Finished difference Result 13558 states and 45474 transitions. [2021-03-10 21:16:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-10 21:16:48,310 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:16:48,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:48,332 INFO L225 Difference]: With dead ends: 13558 [2021-03-10 21:16:48,332 INFO L226 Difference]: Without dead ends: 13548 [2021-03-10 21:16:48,333 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 787.9ms TimeCoverageRelationStatistics Valid=773, Invalid=3133, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 21:16:48,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13548 states. [2021-03-10 21:16:48,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13548 to 6453. [2021-03-10 21:16:48,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 3.6734345939243647) internal successors, (23701), 6452 states have internal predecessors, (23701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:48,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 23701 transitions. [2021-03-10 21:16:48,528 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 23701 transitions. Word has length 25 [2021-03-10 21:16:48,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:48,528 INFO L480 AbstractCegarLoop]: Abstraction has 6453 states and 23701 transitions. [2021-03-10 21:16:48,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:48,528 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 23701 transitions. [2021-03-10 21:16:48,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:16:48,541 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:48,541 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:48,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:48,763 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:48,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:48,763 INFO L82 PathProgramCache]: Analyzing trace with hash -866138014, now seen corresponding path program 17 times [2021-03-10 21:16:48,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:48,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372531520] [2021-03-10 21:16:48,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:48,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372531520] [2021-03-10 21:16:48,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314260127] [2021-03-10 21:16:48,815 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 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 [2021-03-10 21:16:48,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:16:48,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:48,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:16:48,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:48,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:48,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:16:48,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501678101] [2021-03-10 21:16:48,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:16:48,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:48,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:16:48,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:16:48,999 INFO L87 Difference]: Start difference. First operand 6453 states and 23701 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:16:50,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:50,206 INFO L93 Difference]: Finished difference Result 16076 states and 53507 transitions. [2021-03-10 21:16:50,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 21:16:50,207 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-03-10 21:16:50,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:50,233 INFO L225 Difference]: With dead ends: 16076 [2021-03-10 21:16:50,233 INFO L226 Difference]: Without dead ends: 16076 [2021-03-10 21:16:50,234 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 797.1ms TimeCoverageRelationStatistics Valid=679, Invalid=2401, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 21:16:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16076 states. [2021-03-10 21:16:50,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16076 to 5550. [2021-03-10 21:16:50,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5550 states, 5549 states have (on average 3.6352495945215355) internal successors, (20172), 5549 states have internal predecessors, (20172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:50,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 20172 transitions. [2021-03-10 21:16:50,414 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 20172 transitions. Word has length 25 [2021-03-10 21:16:50,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:50,414 INFO L480 AbstractCegarLoop]: Abstraction has 5550 states and 20172 transitions. [2021-03-10 21:16:50,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:16:50,415 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 20172 transitions. [2021-03-10 21:16:50,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:16:50,422 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:50,422 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:50,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-03-10 21:16:50,623 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:50,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:50,624 INFO L82 PathProgramCache]: Analyzing trace with hash -559903394, now seen corresponding path program 25 times [2021-03-10 21:16:50,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:50,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702332884] [2021-03-10 21:16:50,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:50,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702332884] [2021-03-10 21:16:50,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167284112] [2021-03-10 21:16:50,668 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:16:50,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:50,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:16:50,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:50,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:50,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:16:50,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468426839] [2021-03-10 21:16:50,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:16:50,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:50,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:16:50,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:16:50,865 INFO L87 Difference]: Start difference. First operand 5550 states and 20172 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:52,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:52,220 INFO L93 Difference]: Finished difference Result 8927 states and 29584 transitions. [2021-03-10 21:16:52,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-10 21:16:52,220 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:16:52,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:52,235 INFO L225 Difference]: With dead ends: 8927 [2021-03-10 21:16:52,235 INFO L226 Difference]: Without dead ends: 8899 [2021-03-10 21:16:52,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 1061.6ms TimeCoverageRelationStatistics Valid=1142, Invalid=3148, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 21:16:52,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8899 states. [2021-03-10 21:16:52,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8899 to 5452. [2021-03-10 21:16:52,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5452 states, 5451 states have (on average 3.642634379013025) internal successors, (19856), 5451 states have internal predecessors, (19856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:52,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5452 states to 5452 states and 19856 transitions. [2021-03-10 21:16:52,339 INFO L78 Accepts]: Start accepts. Automaton has 5452 states and 19856 transitions. Word has length 25 [2021-03-10 21:16:52,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:52,339 INFO L480 AbstractCegarLoop]: Abstraction has 5452 states and 19856 transitions. [2021-03-10 21:16:52,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:52,339 INFO L276 IsEmpty]: Start isEmpty. Operand 5452 states and 19856 transitions. [2021-03-10 21:16:52,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:16:52,346 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:52,347 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:52,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:52,547 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:52,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:52,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1898789474, now seen corresponding path program 26 times [2021-03-10 21:16:52,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:52,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455559828] [2021-03-10 21:16:52,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:52,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455559828] [2021-03-10 21:16:52,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983475770] [2021-03-10 21:16:52,592 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:16:52,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:16:52,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:52,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:16:52,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:52,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:52,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:16:52,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16715275] [2021-03-10 21:16:52,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:16:52,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:52,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:16:52,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:16:52,755 INFO L87 Difference]: Start difference. First operand 5452 states and 19856 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:53,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:53,842 INFO L93 Difference]: Finished difference Result 8770 states and 29298 transitions. [2021-03-10 21:16:53,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 21:16:53,843 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:16:53,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:53,856 INFO L225 Difference]: With dead ends: 8770 [2021-03-10 21:16:53,856 INFO L226 Difference]: Without dead ends: 8707 [2021-03-10 21:16:53,856 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 839.7ms TimeCoverageRelationStatistics Valid=820, Invalid=2372, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 21:16:53,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8707 states. [2021-03-10 21:16:53,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8707 to 5570. [2021-03-10 21:16:53,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5569 states have (on average 3.627760818818459) internal successors, (20203), 5569 states have internal predecessors, (20203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:53,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 20203 transitions. [2021-03-10 21:16:53,958 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 20203 transitions. Word has length 25 [2021-03-10 21:16:53,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:53,958 INFO L480 AbstractCegarLoop]: Abstraction has 5570 states and 20203 transitions. [2021-03-10 21:16:53,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:53,958 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 20203 transitions. [2021-03-10 21:16:53,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:16:53,965 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:53,965 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:54,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-10 21:16:54,165 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:54,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:54,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1974256990, now seen corresponding path program 27 times [2021-03-10 21:16:54,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:54,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623284399] [2021-03-10 21:16:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:54,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623284399] [2021-03-10 21:16:54,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029131705] [2021-03-10 21:16:54,216 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:16:54,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:16:54,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:54,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:16:54,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:54,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:54,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:16:54,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786911214] [2021-03-10 21:16:54,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:16:54,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:54,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:16:54,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:16:54,414 INFO L87 Difference]: Start difference. First operand 5570 states and 20203 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:55,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:55,114 INFO L93 Difference]: Finished difference Result 6773 states and 23756 transitions. [2021-03-10 21:16:55,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:16:55,115 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:16:55,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:55,154 INFO L225 Difference]: With dead ends: 6773 [2021-03-10 21:16:55,154 INFO L226 Difference]: Without dead ends: 6734 [2021-03-10 21:16:55,154 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 606.5ms TimeCoverageRelationStatistics Valid=330, Invalid=1310, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:16:55,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6734 states. [2021-03-10 21:16:55,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6734 to 5761. [2021-03-10 21:16:55,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5761 states, 5760 states have (on average 3.6230902777777776) internal successors, (20869), 5760 states have internal predecessors, (20869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:55,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5761 states to 5761 states and 20869 transitions. [2021-03-10 21:16:55,253 INFO L78 Accepts]: Start accepts. Automaton has 5761 states and 20869 transitions. Word has length 25 [2021-03-10 21:16:55,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:55,253 INFO L480 AbstractCegarLoop]: Abstraction has 5761 states and 20869 transitions. [2021-03-10 21:16:55,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:55,253 INFO L276 IsEmpty]: Start isEmpty. Operand 5761 states and 20869 transitions. [2021-03-10 21:16:55,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:16:55,261 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:55,261 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:55,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:55,463 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:55,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:55,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1733723230, now seen corresponding path program 28 times [2021-03-10 21:16:55,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:55,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333243111] [2021-03-10 21:16:55,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:55,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333243111] [2021-03-10 21:16:55,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010680474] [2021-03-10 21:16:55,515 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 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 [2021-03-10 21:16:55,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:16:55,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:55,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:16:55,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:55,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:55,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:16:55,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184575925] [2021-03-10 21:16:55,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:16:55,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:55,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:16:55,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:16:55,735 INFO L87 Difference]: Start difference. First operand 5761 states and 20869 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:56,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:56,826 INFO L93 Difference]: Finished difference Result 7641 states and 26156 transitions. [2021-03-10 21:16:56,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:16:56,827 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:16:56,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:56,840 INFO L225 Difference]: With dead ends: 7641 [2021-03-10 21:16:56,840 INFO L226 Difference]: Without dead ends: 7578 [2021-03-10 21:16:56,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 910.6ms TimeCoverageRelationStatistics Valid=524, Invalid=2026, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:16:56,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7578 states. [2021-03-10 21:16:56,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7578 to 6105. [2021-03-10 21:16:56,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6105 states, 6104 states have (on average 3.6094364351245085) internal successors, (22032), 6104 states have internal predecessors, (22032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6105 states to 6105 states and 22032 transitions. [2021-03-10 21:16:56,939 INFO L78 Accepts]: Start accepts. Automaton has 6105 states and 22032 transitions. Word has length 25 [2021-03-10 21:16:56,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:56,939 INFO L480 AbstractCegarLoop]: Abstraction has 6105 states and 22032 transitions. [2021-03-10 21:16:56,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:56,939 INFO L276 IsEmpty]: Start isEmpty. Operand 6105 states and 22032 transitions. [2021-03-10 21:16:56,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:16:56,947 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:56,947 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:57,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:16:57,147 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:57,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1368777634, now seen corresponding path program 29 times [2021-03-10 21:16:57,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:57,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603554995] [2021-03-10 21:16:57,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:57,195 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:57,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603554995] [2021-03-10 21:16:57,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973963705] [2021-03-10 21:16:57,195 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 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 [2021-03-10 21:16:57,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:16:57,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:57,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:16:57,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:57,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:57,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:16:57,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741729105] [2021-03-10 21:16:57,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:16:57,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:57,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:16:57,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:16:57,396 INFO L87 Difference]: Start difference. First operand 6105 states and 22032 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:58,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:16:58,629 INFO L93 Difference]: Finished difference Result 8374 states and 28326 transitions. [2021-03-10 21:16:58,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 21:16:58,630 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:16:58,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:16:58,644 INFO L225 Difference]: With dead ends: 8374 [2021-03-10 21:16:58,644 INFO L226 Difference]: Without dead ends: 8346 [2021-03-10 21:16:58,645 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1010.8ms TimeCoverageRelationStatistics Valid=715, Invalid=2591, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 21:16:58,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8346 states. [2021-03-10 21:16:58,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8346 to 6450. [2021-03-10 21:16:58,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6450 states, 6449 states have (on average 3.6004031632811286) internal successors, (23219), 6449 states have internal predecessors, (23219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:58,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6450 states to 6450 states and 23219 transitions. [2021-03-10 21:16:58,752 INFO L78 Accepts]: Start accepts. Automaton has 6450 states and 23219 transitions. Word has length 25 [2021-03-10 21:16:58,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:16:58,752 INFO L480 AbstractCegarLoop]: Abstraction has 6450 states and 23219 transitions. [2021-03-10 21:16:58,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:16:58,752 INFO L276 IsEmpty]: Start isEmpty. Operand 6450 states and 23219 transitions. [2021-03-10 21:16:58,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:16:58,762 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:16:58,762 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:16:58,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-03-10 21:16:58,962 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:16:58,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:16:58,963 INFO L82 PathProgramCache]: Analyzing trace with hash -264182942, now seen corresponding path program 30 times [2021-03-10 21:16:58,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:16:58,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103024132] [2021-03-10 21:16:58,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:16:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:16:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:59,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103024132] [2021-03-10 21:16:59,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348224649] [2021-03-10 21:16:59,013 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 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 [2021-03-10 21:16:59,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:16:59,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:16:59,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:16:59,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:16:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:16:59,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:16:59,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:16:59,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158764688] [2021-03-10 21:16:59,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:16:59,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:16:59,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:16:59,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:16:59,239 INFO L87 Difference]: Start difference. First operand 6450 states and 23219 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-03-10 21:17:00,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:00,884 INFO L93 Difference]: Finished difference Result 8593 states and 28882 transitions. [2021-03-10 21:17:00,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-03-10 21:17:00,885 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-03-10 21:17:00,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:00,898 INFO L225 Difference]: With dead ends: 8593 [2021-03-10 21:17:00,898 INFO L226 Difference]: Without dead ends: 8581 [2021-03-10 21:17:00,902 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1853 ImplicationChecksByTransitivity, 1341.8ms TimeCoverageRelationStatistics Valid=1172, Invalid=4084, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 21:17:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8581 states. [2021-03-10 21:17:00,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8581 to 6369. [2021-03-10 21:17:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6369 states, 6368 states have (on average 3.5976758793969847) internal successors, (22910), 6368 states have internal predecessors, (22910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:01,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6369 states to 6369 states and 22910 transitions. [2021-03-10 21:17:01,012 INFO L78 Accepts]: Start accepts. Automaton has 6369 states and 22910 transitions. Word has length 25 [2021-03-10 21:17:01,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:01,012 INFO L480 AbstractCegarLoop]: Abstraction has 6369 states and 22910 transitions. [2021-03-10 21:17:01,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-03-10 21:17:01,012 INFO L276 IsEmpty]: Start isEmpty. Operand 6369 states and 22910 transitions. [2021-03-10 21:17:01,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:01,060 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:01,060 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:01,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:01,267 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:01,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:01,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1956290778, now seen corresponding path program 31 times [2021-03-10 21:17:01,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:01,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94635379] [2021-03-10 21:17:01,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:01,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94635379] [2021-03-10 21:17:01,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94743627] [2021-03-10 21:17:01,319 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 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 [2021-03-10 21:17:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:01,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:17:01,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:01,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:01,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-03-10 21:17:01,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669293447] [2021-03-10 21:17:01,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:17:01,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:01,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:17:01,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:17:01,420 INFO L87 Difference]: Start difference. First operand 6369 states and 22910 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:01,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:01,824 INFO L93 Difference]: Finished difference Result 8392 states and 28777 transitions. [2021-03-10 21:17:01,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:17:01,824 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:01,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:01,839 INFO L225 Difference]: With dead ends: 8392 [2021-03-10 21:17:01,839 INFO L226 Difference]: Without dead ends: 8384 [2021-03-10 21:17:01,839 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:17:01,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8384 states. [2021-03-10 21:17:01,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8384 to 6042. [2021-03-10 21:17:01,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6042 states, 6041 states have (on average 3.577056778679027) internal successors, (21609), 6041 states have internal predecessors, (21609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6042 states to 6042 states and 21609 transitions. [2021-03-10 21:17:01,942 INFO L78 Accepts]: Start accepts. Automaton has 6042 states and 21609 transitions. Word has length 25 [2021-03-10 21:17:01,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:01,942 INFO L480 AbstractCegarLoop]: Abstraction has 6042 states and 21609 transitions. [2021-03-10 21:17:01,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:01,942 INFO L276 IsEmpty]: Start isEmpty. Operand 6042 states and 21609 transitions. [2021-03-10 21:17:01,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:01,951 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:01,951 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:02,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:02,155 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:02,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:02,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1612048410, now seen corresponding path program 32 times [2021-03-10 21:17:02,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:02,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318580189] [2021-03-10 21:17:02,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:02,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318580189] [2021-03-10 21:17:02,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607708224] [2021-03-10 21:17:02,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:17:02,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:17:02,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:02,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:02,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:02,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:02,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:17:02,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280041424] [2021-03-10 21:17:02,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:17:02,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:02,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:17:02,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:02,375 INFO L87 Difference]: Start difference. First operand 6042 states and 21609 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:04,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:04,361 INFO L93 Difference]: Finished difference Result 10663 states and 35444 transitions. [2021-03-10 21:17:04,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-03-10 21:17:04,362 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:04,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:04,379 INFO L225 Difference]: With dead ends: 10663 [2021-03-10 21:17:04,379 INFO L226 Difference]: Without dead ends: 10663 [2021-03-10 21:17:04,380 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 1489.1ms TimeCoverageRelationStatistics Valid=1899, Invalid=6111, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 21:17:04,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10663 states. [2021-03-10 21:17:04,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10663 to 6518. [2021-03-10 21:17:04,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6518 states, 6517 states have (on average 3.620991253644315) internal successors, (23598), 6517 states have internal predecessors, (23598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:04,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6518 states to 6518 states and 23598 transitions. [2021-03-10 21:17:04,513 INFO L78 Accepts]: Start accepts. Automaton has 6518 states and 23598 transitions. Word has length 25 [2021-03-10 21:17:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:04,513 INFO L480 AbstractCegarLoop]: Abstraction has 6518 states and 23598 transitions. [2021-03-10 21:17:04,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:04,513 INFO L276 IsEmpty]: Start isEmpty. Operand 6518 states and 23598 transitions. [2021-03-10 21:17:04,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:04,522 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:04,522 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:04,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-03-10 21:17:04,723 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:04,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:04,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1485172762, now seen corresponding path program 33 times [2021-03-10 21:17:04,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:04,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737626168] [2021-03-10 21:17:04,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:04,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:04,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737626168] [2021-03-10 21:17:04,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516714809] [2021-03-10 21:17:04,759 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 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 [2021-03-10 21:17:04,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:17:04,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:04,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:04,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:04,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:04,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:04,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:17:04,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635510985] [2021-03-10 21:17:04,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:17:04,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:04,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:17:04,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:04,904 INFO L87 Difference]: Start difference. First operand 6518 states and 23598 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:06,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:06,068 INFO L93 Difference]: Finished difference Result 9445 states and 31738 transitions. [2021-03-10 21:17:06,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 21:17:06,069 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:06,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:06,084 INFO L225 Difference]: With dead ends: 9445 [2021-03-10 21:17:06,084 INFO L226 Difference]: Without dead ends: 9417 [2021-03-10 21:17:06,084 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 799.7ms TimeCoverageRelationStatistics Valid=807, Invalid=2273, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 21:17:06,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9417 states. [2021-03-10 21:17:06,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9417 to 6506. [2021-03-10 21:17:06,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6506 states, 6505 states have (on average 3.617524980784012) internal successors, (23532), 6505 states have internal predecessors, (23532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:06,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6506 states to 6506 states and 23532 transitions. [2021-03-10 21:17:06,209 INFO L78 Accepts]: Start accepts. Automaton has 6506 states and 23532 transitions. Word has length 25 [2021-03-10 21:17:06,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:06,209 INFO L480 AbstractCegarLoop]: Abstraction has 6506 states and 23532 transitions. [2021-03-10 21:17:06,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:06,210 INFO L276 IsEmpty]: Start isEmpty. Operand 6506 states and 23532 transitions. [2021-03-10 21:17:06,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:06,220 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:06,220 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:06,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:06,420 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:06,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:06,420 INFO L82 PathProgramCache]: Analyzing trace with hash -2024341986, now seen corresponding path program 34 times [2021-03-10 21:17:06,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:06,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671100291] [2021-03-10 21:17:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:06,458 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:06,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671100291] [2021-03-10 21:17:06,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543646913] [2021-03-10 21:17:06,459 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 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 [2021-03-10 21:17:06,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:17:06,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:06,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:06,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:06,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:06,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:17:06,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142297812] [2021-03-10 21:17:06,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:17:06,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:06,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:17:06,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:06,634 INFO L87 Difference]: Start difference. First operand 6506 states and 23532 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:08,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:08,581 INFO L93 Difference]: Finished difference Result 11207 states and 37438 transitions. [2021-03-10 21:17:08,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-03-10 21:17:08,581 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:08,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:08,598 INFO L225 Difference]: With dead ends: 11207 [2021-03-10 21:17:08,599 INFO L226 Difference]: Without dead ends: 11207 [2021-03-10 21:17:08,599 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 1423.9ms TimeCoverageRelationStatistics Valid=1921, Invalid=6089, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 21:17:08,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11207 states. [2021-03-10 21:17:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11207 to 6511. [2021-03-10 21:17:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6511 states, 6510 states have (on average 3.6225806451612903) internal successors, (23583), 6510 states have internal predecessors, (23583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:08,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6511 states to 6511 states and 23583 transitions. [2021-03-10 21:17:08,738 INFO L78 Accepts]: Start accepts. Automaton has 6511 states and 23583 transitions. Word has length 25 [2021-03-10 21:17:08,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:08,738 INFO L480 AbstractCegarLoop]: Abstraction has 6511 states and 23583 transitions. [2021-03-10 21:17:08,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 6511 states and 23583 transitions. [2021-03-10 21:17:08,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:08,748 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:08,748 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:08,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-03-10 21:17:08,948 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:08,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:08,949 INFO L82 PathProgramCache]: Analyzing trace with hash -987660262, now seen corresponding path program 35 times [2021-03-10 21:17:08,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:08,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068764756] [2021-03-10 21:17:08,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:08,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068764756] [2021-03-10 21:17:08,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251342610] [2021-03-10 21:17:08,985 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 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 [2021-03-10 21:17:09,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:17:09,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:09,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:09,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:09,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:09,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:17:09,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020430198] [2021-03-10 21:17:09,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:17:09,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:09,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:17:09,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:09,129 INFO L87 Difference]: Start difference. First operand 6511 states and 23583 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:10,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:10,583 INFO L93 Difference]: Finished difference Result 10680 states and 35655 transitions. [2021-03-10 21:17:10,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-03-10 21:17:10,584 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:10,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:10,600 INFO L225 Difference]: With dead ends: 10680 [2021-03-10 21:17:10,600 INFO L226 Difference]: Without dead ends: 10668 [2021-03-10 21:17:10,601 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 1066.8ms TimeCoverageRelationStatistics Valid=1285, Invalid=3545, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 21:17:10,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10668 states. [2021-03-10 21:17:10,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10668 to 6551. [2021-03-10 21:17:10,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6551 states, 6550 states have (on average 3.612671755725191) internal successors, (23663), 6550 states have internal predecessors, (23663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:10,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6551 states to 6551 states and 23663 transitions. [2021-03-10 21:17:10,733 INFO L78 Accepts]: Start accepts. Automaton has 6551 states and 23663 transitions. Word has length 25 [2021-03-10 21:17:10,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:10,733 INFO L480 AbstractCegarLoop]: Abstraction has 6551 states and 23663 transitions. [2021-03-10 21:17:10,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:10,733 INFO L276 IsEmpty]: Start isEmpty. Operand 6551 states and 23663 transitions. [2021-03-10 21:17:10,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:10,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:10,745 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:10,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-03-10 21:17:10,950 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:10,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:10,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1536438246, now seen corresponding path program 36 times [2021-03-10 21:17:10,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:10,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919952564] [2021-03-10 21:17:10,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:10,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919952564] [2021-03-10 21:17:10,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575490228] [2021-03-10 21:17:10,988 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 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 [2021-03-10 21:17:11,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:17:11,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:11,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:11,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:11,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:11,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:17:11,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335094182] [2021-03-10 21:17:11,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:17:11,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:11,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:17:11,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:11,136 INFO L87 Difference]: Start difference. First operand 6551 states and 23663 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:12,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:12,273 INFO L93 Difference]: Finished difference Result 9675 states and 32431 transitions. [2021-03-10 21:17:12,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 21:17:12,274 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:12,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:12,291 INFO L225 Difference]: With dead ends: 9675 [2021-03-10 21:17:12,291 INFO L226 Difference]: Without dead ends: 9654 [2021-03-10 21:17:12,292 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 774.0ms TimeCoverageRelationStatistics Valid=807, Invalid=2273, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 21:17:12,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9654 states. [2021-03-10 21:17:12,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9654 to 6620. [2021-03-10 21:17:12,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6620 states, 6619 states have (on average 3.6132346275872487) internal successors, (23916), 6619 states have internal predecessors, (23916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:12,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6620 states to 6620 states and 23916 transitions. [2021-03-10 21:17:12,467 INFO L78 Accepts]: Start accepts. Automaton has 6620 states and 23916 transitions. Word has length 25 [2021-03-10 21:17:12,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:12,467 INFO L480 AbstractCegarLoop]: Abstraction has 6620 states and 23916 transitions. [2021-03-10 21:17:12,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:12,468 INFO L276 IsEmpty]: Start isEmpty. Operand 6620 states and 23916 transitions. [2021-03-10 21:17:12,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:12,476 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:12,477 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:12,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-10 21:17:12,677 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:12,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:12,677 INFO L82 PathProgramCache]: Analyzing trace with hash -431843554, now seen corresponding path program 37 times [2021-03-10 21:17:12,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:12,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221730385] [2021-03-10 21:17:12,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:12,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221730385] [2021-03-10 21:17:12,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172673730] [2021-03-10 21:17:12,727 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 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 [2021-03-10 21:17:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:12,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:12,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:12,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:12,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:17:12,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869833710] [2021-03-10 21:17:12,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:17:12,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:12,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:17:12,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:12,897 INFO L87 Difference]: Start difference. First operand 6620 states and 23916 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2021-03-10 21:17:14,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:14,487 INFO L93 Difference]: Finished difference Result 10253 states and 33929 transitions. [2021-03-10 21:17:14,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-10 21:17:14,487 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 25 [2021-03-10 21:17:14,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:14,502 INFO L225 Difference]: With dead ends: 10253 [2021-03-10 21:17:14,502 INFO L226 Difference]: Without dead ends: 10241 [2021-03-10 21:17:14,503 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 1171.3ms TimeCoverageRelationStatistics Valid=1341, Invalid=3915, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 21:17:14,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10241 states. [2021-03-10 21:17:14,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10241 to 6509. [2021-03-10 21:17:14,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6509 states, 6508 states have (on average 3.610018438844499) internal successors, (23494), 6508 states have internal predecessors, (23494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:14,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 23494 transitions. [2021-03-10 21:17:14,627 INFO L78 Accepts]: Start accepts. Automaton has 6509 states and 23494 transitions. Word has length 25 [2021-03-10 21:17:14,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:14,627 INFO L480 AbstractCegarLoop]: Abstraction has 6509 states and 23494 transitions. [2021-03-10 21:17:14,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2021-03-10 21:17:14,627 INFO L276 IsEmpty]: Start isEmpty. Operand 6509 states and 23494 transitions. [2021-03-10 21:17:14,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:14,636 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:14,636 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:14,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:14,836 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:14,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:14,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1498494430, now seen corresponding path program 38 times [2021-03-10 21:17:14,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:14,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722505165] [2021-03-10 21:17:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:14,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722505165] [2021-03-10 21:17:14,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469614369] [2021-03-10 21:17:14,876 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:17:14,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:17:14,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:14,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:14,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:15,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:15,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:17:15,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067671442] [2021-03-10 21:17:15,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:17:15,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:15,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:17:15,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:15,048 INFO L87 Difference]: Start difference. First operand 6509 states and 23494 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:16,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:16,231 INFO L93 Difference]: Finished difference Result 10693 states and 36403 transitions. [2021-03-10 21:17:16,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 21:17:16,232 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:16,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:16,249 INFO L225 Difference]: With dead ends: 10693 [2021-03-10 21:17:16,249 INFO L226 Difference]: Without dead ends: 10630 [2021-03-10 21:17:16,250 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 804.0ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:17:16,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10630 states. [2021-03-10 21:17:16,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10630 to 7017. [2021-03-10 21:17:16,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7017 states, 7016 states have (on average 3.6458095781071838) internal successors, (25579), 7016 states have internal predecessors, (25579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:16,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7017 states to 7017 states and 25579 transitions. [2021-03-10 21:17:16,404 INFO L78 Accepts]: Start accepts. Automaton has 7017 states and 25579 transitions. Word has length 25 [2021-03-10 21:17:16,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:16,404 INFO L480 AbstractCegarLoop]: Abstraction has 7017 states and 25579 transitions. [2021-03-10 21:17:16,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:16,404 INFO L276 IsEmpty]: Start isEmpty. Operand 7017 states and 25579 transitions. [2021-03-10 21:17:16,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:16,413 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:16,413 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:16,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:16,614 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:16,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:16,614 INFO L82 PathProgramCache]: Analyzing trace with hash -964604898, now seen corresponding path program 39 times [2021-03-10 21:17:16,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:16,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142147841] [2021-03-10 21:17:16,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:16,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142147841] [2021-03-10 21:17:16,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208417882] [2021-03-10 21:17:16,652 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 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 [2021-03-10 21:17:16,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:17:16,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:16,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:16,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:16,815 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:16,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:16,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:17:16,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428128454] [2021-03-10 21:17:16,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:17:16,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:16,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:17:16,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:16,816 INFO L87 Difference]: Start difference. First operand 7017 states and 25579 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:18,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:18,034 INFO L93 Difference]: Finished difference Result 11280 states and 38187 transitions. [2021-03-10 21:17:18,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 21:17:18,035 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:18,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:18,054 INFO L225 Difference]: With dead ends: 11280 [2021-03-10 21:17:18,054 INFO L226 Difference]: Without dead ends: 11245 [2021-03-10 21:17:18,054 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 888.6ms TimeCoverageRelationStatistics Valid=900, Invalid=2522, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 21:17:18,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11245 states. [2021-03-10 21:17:18,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11245 to 7482. [2021-03-10 21:17:18,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7482 states, 7481 states have (on average 3.6388183397941454) internal successors, (27222), 7481 states have internal predecessors, (27222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7482 states to 7482 states and 27222 transitions. [2021-03-10 21:17:18,250 INFO L78 Accepts]: Start accepts. Automaton has 7482 states and 27222 transitions. Word has length 25 [2021-03-10 21:17:18,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:18,251 INFO L480 AbstractCegarLoop]: Abstraction has 7482 states and 27222 transitions. [2021-03-10 21:17:18,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:18,251 INFO L276 IsEmpty]: Start isEmpty. Operand 7482 states and 27222 transitions. [2021-03-10 21:17:18,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:18,260 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:18,260 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:18,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:18,461 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:18,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:18,461 INFO L82 PathProgramCache]: Analyzing trace with hash 139989794, now seen corresponding path program 40 times [2021-03-10 21:17:18,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:18,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219908837] [2021-03-10 21:17:18,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:18,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219908837] [2021-03-10 21:17:18,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144261619] [2021-03-10 21:17:18,499 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:17:18,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:17:18,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:18,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:18,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:18,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:18,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:17:18,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993994563] [2021-03-10 21:17:18,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:17:18,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:18,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:17:18,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:18,693 INFO L87 Difference]: Start difference. First operand 7482 states and 27222 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2021-03-10 21:17:20,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:20,277 INFO L93 Difference]: Finished difference Result 11657 states and 39077 transitions. [2021-03-10 21:17:20,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-10 21:17:20,278 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 25 [2021-03-10 21:17:20,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:20,296 INFO L225 Difference]: With dead ends: 11657 [2021-03-10 21:17:20,297 INFO L226 Difference]: Without dead ends: 11645 [2021-03-10 21:17:20,297 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 1179.5ms TimeCoverageRelationStatistics Valid=1345, Invalid=3767, Unknown=0, NotChecked=0, Total=5112 [2021-03-10 21:17:20,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11645 states. [2021-03-10 21:17:20,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11645 to 7340. [2021-03-10 21:17:20,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7340 states, 7339 states have (on average 3.637825316800654) internal successors, (26698), 7339 states have internal predecessors, (26698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:20,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7340 states to 7340 states and 26698 transitions. [2021-03-10 21:17:20,444 INFO L78 Accepts]: Start accepts. Automaton has 7340 states and 26698 transitions. Word has length 25 [2021-03-10 21:17:20,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:20,444 INFO L480 AbstractCegarLoop]: Abstraction has 7340 states and 26698 transitions. [2021-03-10 21:17:20,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2021-03-10 21:17:20,444 INFO L276 IsEmpty]: Start isEmpty. Operand 7340 states and 26698 transitions. [2021-03-10 21:17:20,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:20,454 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:20,454 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:20,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:20,655 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:20,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:20,655 INFO L82 PathProgramCache]: Analyzing trace with hash -553709480, now seen corresponding path program 41 times [2021-03-10 21:17:20,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:20,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947586184] [2021-03-10 21:17:20,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:20,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947586184] [2021-03-10 21:17:20,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105414682] [2021-03-10 21:17:20,701 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:17:20,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:17:20,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:20,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:17:20,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:20,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:20,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-03-10 21:17:20,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018461264] [2021-03-10 21:17:20,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:17:20,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:20,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:17:20,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:17:20,836 INFO L87 Difference]: Start difference. First operand 7340 states and 26698 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:21,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:21,298 INFO L93 Difference]: Finished difference Result 17556 states and 60790 transitions. [2021-03-10 21:17:21,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:17:21,299 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:21,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:21,329 INFO L225 Difference]: With dead ends: 17556 [2021-03-10 21:17:21,329 INFO L226 Difference]: Without dead ends: 17556 [2021-03-10 21:17:21,329 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 273.2ms TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:17:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17556 states. [2021-03-10 21:17:21,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17556 to 10339. [2021-03-10 21:17:21,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10339 states, 10338 states have (on average 3.74530857032308) internal successors, (38719), 10338 states have internal predecessors, (38719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:21,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10339 states to 10339 states and 38719 transitions. [2021-03-10 21:17:21,565 INFO L78 Accepts]: Start accepts. Automaton has 10339 states and 38719 transitions. Word has length 25 [2021-03-10 21:17:21,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:21,565 INFO L480 AbstractCegarLoop]: Abstraction has 10339 states and 38719 transitions. [2021-03-10 21:17:21,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:21,565 INFO L276 IsEmpty]: Start isEmpty. Operand 10339 states and 38719 transitions. [2021-03-10 21:17:21,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:21,580 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:21,580 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:21,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-03-10 21:17:21,781 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:21,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:21,781 INFO L82 PathProgramCache]: Analyzing trace with hash 966347424, now seen corresponding path program 42 times [2021-03-10 21:17:21,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:21,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245969584] [2021-03-10 21:17:21,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:21,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245969584] [2021-03-10 21:17:21,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042231231] [2021-03-10 21:17:21,822 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 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 [2021-03-10 21:17:21,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:17:21,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:21,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:17:21,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:21,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:21,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-03-10 21:17:21,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538689882] [2021-03-10 21:17:21,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:17:21,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:21,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:17:21,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:17:21,917 INFO L87 Difference]: Start difference. First operand 10339 states and 38719 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:22,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:22,275 INFO L93 Difference]: Finished difference Result 14487 states and 51045 transitions. [2021-03-10 21:17:22,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:17:22,275 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:22,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:22,301 INFO L225 Difference]: With dead ends: 14487 [2021-03-10 21:17:22,302 INFO L226 Difference]: Without dead ends: 14473 [2021-03-10 21:17:22,302 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 195.6ms TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:17:22,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14473 states. [2021-03-10 21:17:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14473 to 9632. [2021-03-10 21:17:22,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9632 states, 9631 states have (on average 3.7334648530786003) internal successors, (35957), 9631 states have internal predecessors, (35957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:22,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9632 states to 9632 states and 35957 transitions. [2021-03-10 21:17:22,494 INFO L78 Accepts]: Start accepts. Automaton has 9632 states and 35957 transitions. Word has length 25 [2021-03-10 21:17:22,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:22,494 INFO L480 AbstractCegarLoop]: Abstraction has 9632 states and 35957 transitions. [2021-03-10 21:17:22,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:22,494 INFO L276 IsEmpty]: Start isEmpty. Operand 9632 states and 35957 transitions. [2021-03-10 21:17:22,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:22,508 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:22,508 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:22,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:22,708 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:22,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:22,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1845484934, now seen corresponding path program 43 times [2021-03-10 21:17:22,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:22,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680394275] [2021-03-10 21:17:22,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:22,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680394275] [2021-03-10 21:17:22,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931944430] [2021-03-10 21:17:22,760 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 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 [2021-03-10 21:17:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:22,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:17:22,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:22,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:22,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-03-10 21:17:22,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527592144] [2021-03-10 21:17:22,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:17:22,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:22,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:17:22,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:17:22,863 INFO L87 Difference]: Start difference. First operand 9632 states and 35957 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:23,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:23,187 INFO L93 Difference]: Finished difference Result 13632 states and 47869 transitions. [2021-03-10 21:17:23,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:17:23,187 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:23,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:23,211 INFO L225 Difference]: With dead ends: 13632 [2021-03-10 21:17:23,212 INFO L226 Difference]: Without dead ends: 13610 [2021-03-10 21:17:23,212 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:17:23,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13610 states. [2021-03-10 21:17:23,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13610 to 8431. [2021-03-10 21:17:23,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8431 states, 8430 states have (on average 3.7080664294187424) internal successors, (31259), 8430 states have internal predecessors, (31259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8431 states to 8431 states and 31259 transitions. [2021-03-10 21:17:23,411 INFO L78 Accepts]: Start accepts. Automaton has 8431 states and 31259 transitions. Word has length 25 [2021-03-10 21:17:23,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:23,411 INFO L480 AbstractCegarLoop]: Abstraction has 8431 states and 31259 transitions. [2021-03-10 21:17:23,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:23,412 INFO L276 IsEmpty]: Start isEmpty. Operand 8431 states and 31259 transitions. [2021-03-10 21:17:23,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:23,423 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:23,424 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:23,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:23,624 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:23,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:23,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1748642604, now seen corresponding path program 44 times [2021-03-10 21:17:23,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:23,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533278774] [2021-03-10 21:17:23,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:23,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533278774] [2021-03-10 21:17:23,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496033573] [2021-03-10 21:17:23,660 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 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 [2021-03-10 21:17:23,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:17:23,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:23,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:23,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:23,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:23,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:17:23,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935803403] [2021-03-10 21:17:23,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:17:23,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:23,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:17:23,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:23,836 INFO L87 Difference]: Start difference. First operand 8431 states and 31259 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:25,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:25,828 INFO L93 Difference]: Finished difference Result 12080 states and 41798 transitions. [2021-03-10 21:17:25,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-03-10 21:17:25,828 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:25,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:25,849 INFO L225 Difference]: With dead ends: 12080 [2021-03-10 21:17:25,849 INFO L226 Difference]: Without dead ends: 12080 [2021-03-10 21:17:25,850 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 1551.6ms TimeCoverageRelationStatistics Valid=1834, Invalid=6176, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 21:17:25,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12080 states. [2021-03-10 21:17:26,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12080 to 8456. [2021-03-10 21:17:26,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8456 states, 8455 states have (on average 3.710348905972797) internal successors, (31371), 8455 states have internal predecessors, (31371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:26,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8456 states to 8456 states and 31371 transitions. [2021-03-10 21:17:26,075 INFO L78 Accepts]: Start accepts. Automaton has 8456 states and 31371 transitions. Word has length 25 [2021-03-10 21:17:26,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:26,075 INFO L480 AbstractCegarLoop]: Abstraction has 8456 states and 31371 transitions. [2021-03-10 21:17:26,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:26,075 INFO L276 IsEmpty]: Start isEmpty. Operand 8456 states and 31371 transitions. [2021-03-10 21:17:26,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:26,087 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:26,087 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:26,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-03-10 21:17:26,287 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:26,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:26,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1875518252, now seen corresponding path program 45 times [2021-03-10 21:17:26,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:26,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503743614] [2021-03-10 21:17:26,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:26,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503743614] [2021-03-10 21:17:26,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372332314] [2021-03-10 21:17:26,329 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:17:26,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:17:26,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:26,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:26,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:26,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:26,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:17:26,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136921589] [2021-03-10 21:17:26,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:17:26,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:26,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:17:26,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:26,521 INFO L87 Difference]: Start difference. First operand 8456 states and 31371 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:27,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:27,849 INFO L93 Difference]: Finished difference Result 10961 states and 38403 transitions. [2021-03-10 21:17:27,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 21:17:27,851 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:27,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:27,870 INFO L225 Difference]: With dead ends: 10961 [2021-03-10 21:17:27,870 INFO L226 Difference]: Without dead ends: 10947 [2021-03-10 21:17:27,870 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 990.1ms TimeCoverageRelationStatistics Valid=885, Invalid=2655, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 21:17:27,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10947 states. [2021-03-10 21:17:28,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10947 to 8438. [2021-03-10 21:17:28,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8438 states, 8437 states have (on average 3.7093753703923196) internal successors, (31296), 8437 states have internal predecessors, (31296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:28,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8438 states to 8438 states and 31296 transitions. [2021-03-10 21:17:28,028 INFO L78 Accepts]: Start accepts. Automaton has 8438 states and 31296 transitions. Word has length 25 [2021-03-10 21:17:28,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:28,028 INFO L480 AbstractCegarLoop]: Abstraction has 8438 states and 31296 transitions. [2021-03-10 21:17:28,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:28,028 INFO L276 IsEmpty]: Start isEmpty. Operand 8438 states and 31296 transitions. [2021-03-10 21:17:28,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:28,041 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:28,041 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:28,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:28,241 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:28,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:28,242 INFO L82 PathProgramCache]: Analyzing trace with hash 583174616, now seen corresponding path program 46 times [2021-03-10 21:17:28,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:28,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510148819] [2021-03-10 21:17:28,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:17:28,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510148819] [2021-03-10 21:17:28,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814990691] [2021-03-10 21:17:28,276 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 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 [2021-03-10 21:17:28,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:17:28,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:28,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:28,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:28,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:28,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:17:28,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152821946] [2021-03-10 21:17:28,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:17:28,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:28,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:17:28,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:28,428 INFO L87 Difference]: Start difference. First operand 8438 states and 31296 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:29,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:29,472 INFO L93 Difference]: Finished difference Result 10752 states and 37881 transitions. [2021-03-10 21:17:29,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 21:17:29,473 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:29,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:29,490 INFO L225 Difference]: With dead ends: 10752 [2021-03-10 21:17:29,490 INFO L226 Difference]: Without dead ends: 10689 [2021-03-10 21:17:29,490 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 763.9ms TimeCoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 21:17:29,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10689 states. [2021-03-10 21:17:29,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10689 to 8433. [2021-03-10 21:17:29,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8433 states, 8432 states have (on average 3.7100332068311195) internal successors, (31283), 8432 states have internal predecessors, (31283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:29,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8433 states to 8433 states and 31283 transitions. [2021-03-10 21:17:29,638 INFO L78 Accepts]: Start accepts. Automaton has 8433 states and 31283 transitions. Word has length 25 [2021-03-10 21:17:29,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:29,638 INFO L480 AbstractCegarLoop]: Abstraction has 8433 states and 31283 transitions. [2021-03-10 21:17:29,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:29,638 INFO L276 IsEmpty]: Start isEmpty. Operand 8433 states and 31283 transitions. [2021-03-10 21:17:29,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:29,649 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:29,650 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:29,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-03-10 21:17:29,850 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:29,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:29,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1910600748, now seen corresponding path program 18 times [2021-03-10 21:17:29,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:29,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275890228] [2021-03-10 21:17:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:29,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275890228] [2021-03-10 21:17:29,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969369557] [2021-03-10 21:17:29,911 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 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 [2021-03-10 21:17:29,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:17:29,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:29,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:29,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:30,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:30,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:30,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:17:30,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908929227] [2021-03-10 21:17:30,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:17:30,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:30,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:17:30,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:17:30,077 INFO L87 Difference]: Start difference. First operand 8433 states and 31283 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:31,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:31,068 INFO L93 Difference]: Finished difference Result 9191 states and 33180 transitions. [2021-03-10 21:17:31,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 21:17:31,069 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:31,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:31,084 INFO L225 Difference]: With dead ends: 9191 [2021-03-10 21:17:31,084 INFO L226 Difference]: Without dead ends: 9187 [2021-03-10 21:17:31,085 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 775.8ms TimeCoverageRelationStatistics Valid=486, Invalid=1964, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:17:31,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9187 states. [2021-03-10 21:17:31,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9187 to 8523. [2021-03-10 21:17:31,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8523 states, 8522 states have (on average 3.701243839474302) internal successors, (31542), 8522 states have internal predecessors, (31542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:31,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8523 states to 8523 states and 31542 transitions. [2021-03-10 21:17:31,210 INFO L78 Accepts]: Start accepts. Automaton has 8523 states and 31542 transitions. Word has length 25 [2021-03-10 21:17:31,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:31,210 INFO L480 AbstractCegarLoop]: Abstraction has 8523 states and 31542 transitions. [2021-03-10 21:17:31,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:31,210 INFO L276 IsEmpty]: Start isEmpty. Operand 8523 states and 31542 transitions. [2021-03-10 21:17:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:31,222 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:31,222 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:31,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:31,422 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:31,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:31,423 INFO L82 PathProgramCache]: Analyzing trace with hash 25489256, now seen corresponding path program 19 times [2021-03-10 21:17:31,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:31,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589056429] [2021-03-10 21:17:31,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:31,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589056429] [2021-03-10 21:17:31,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907872623] [2021-03-10 21:17:31,469 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 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 [2021-03-10 21:17:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:31,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:17:31,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:31,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:31,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-03-10 21:17:31,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233212257] [2021-03-10 21:17:31,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:17:31,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:31,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:17:31,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:31,607 INFO L87 Difference]: Start difference. First operand 8523 states and 31542 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:32,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:32,332 INFO L93 Difference]: Finished difference Result 19794 states and 70007 transitions. [2021-03-10 21:17:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:17:32,333 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:32,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:32,434 INFO L225 Difference]: With dead ends: 19794 [2021-03-10 21:17:32,434 INFO L226 Difference]: Without dead ends: 19766 [2021-03-10 21:17:32,434 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 504.5ms TimeCoverageRelationStatistics Valid=392, Invalid=1168, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:17:32,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19766 states. [2021-03-10 21:17:32,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19766 to 9783. [2021-03-10 21:17:32,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9783 states, 9782 states have (on average 3.736659169903905) internal successors, (36552), 9782 states have internal predecessors, (36552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:32,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9783 states to 9783 states and 36552 transitions. [2021-03-10 21:17:32,644 INFO L78 Accepts]: Start accepts. Automaton has 9783 states and 36552 transitions. Word has length 25 [2021-03-10 21:17:32,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:32,644 INFO L480 AbstractCegarLoop]: Abstraction has 9783 states and 36552 transitions. [2021-03-10 21:17:32,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:32,644 INFO L276 IsEmpty]: Start isEmpty. Operand 9783 states and 36552 transitions. [2021-03-10 21:17:32,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:32,658 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:32,658 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:32,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-03-10 21:17:32,858 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:32,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:32,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1925748840, now seen corresponding path program 20 times [2021-03-10 21:17:32,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:32,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434430707] [2021-03-10 21:17:32,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:32,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434430707] [2021-03-10 21:17:32,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703225401] [2021-03-10 21:17:32,921 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:17:32,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:17:32,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:32,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:17:32,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:33,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:33,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:17:33,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638955386] [2021-03-10 21:17:33,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:17:33,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:33,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:17:33,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:17:33,108 INFO L87 Difference]: Start difference. First operand 9783 states and 36552 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:17:33,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:33,885 INFO L93 Difference]: Finished difference Result 24314 states and 85958 transitions. [2021-03-10 21:17:33,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:17:33,886 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-03-10 21:17:33,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:33,932 INFO L225 Difference]: With dead ends: 24314 [2021-03-10 21:17:33,932 INFO L226 Difference]: Without dead ends: 24300 [2021-03-10 21:17:33,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 542.8ms TimeCoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:17:33,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24300 states. [2021-03-10 21:17:34,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24300 to 11688. [2021-03-10 21:17:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11688 states, 11687 states have (on average 3.7396252246085395) internal successors, (43705), 11687 states have internal predecessors, (43705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11688 states to 11688 states and 43705 transitions. [2021-03-10 21:17:34,213 INFO L78 Accepts]: Start accepts. Automaton has 11688 states and 43705 transitions. Word has length 25 [2021-03-10 21:17:34,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:34,213 INFO L480 AbstractCegarLoop]: Abstraction has 11688 states and 43705 transitions. [2021-03-10 21:17:34,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:17:34,213 INFO L276 IsEmpty]: Start isEmpty. Operand 11688 states and 43705 transitions. [2021-03-10 21:17:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:34,229 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:34,229 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:34,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:34,435 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:34,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:34,435 INFO L82 PathProgramCache]: Analyzing trace with hash -2062983836, now seen corresponding path program 21 times [2021-03-10 21:17:34,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:34,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176488888] [2021-03-10 21:17:34,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:34,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176488888] [2021-03-10 21:17:34,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810393993] [2021-03-10 21:17:34,496 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 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 [2021-03-10 21:17:34,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:17:34,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:34,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:34,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:34,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:34,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:17:34,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527441164] [2021-03-10 21:17:34,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:17:34,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:34,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:17:34,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:34,658 INFO L87 Difference]: Start difference. First operand 11688 states and 43705 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:35,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:35,603 INFO L93 Difference]: Finished difference Result 12255 states and 45097 transitions. [2021-03-10 21:17:35,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:17:35,604 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:35,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:35,628 INFO L225 Difference]: With dead ends: 12255 [2021-03-10 21:17:35,628 INFO L226 Difference]: Without dead ends: 12241 [2021-03-10 21:17:35,628 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 726.5ms TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:17:35,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12241 states. [2021-03-10 21:17:35,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12241 to 11650. [2021-03-10 21:17:35,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11650 states, 11649 states have (on average 3.7421237874495663) internal successors, (43592), 11649 states have internal predecessors, (43592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:35,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11650 states to 11650 states and 43592 transitions. [2021-03-10 21:17:35,809 INFO L78 Accepts]: Start accepts. Automaton has 11650 states and 43592 transitions. Word has length 25 [2021-03-10 21:17:35,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:35,809 INFO L480 AbstractCegarLoop]: Abstraction has 11650 states and 43592 transitions. [2021-03-10 21:17:35,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:35,809 INFO L276 IsEmpty]: Start isEmpty. Operand 11650 states and 43592 transitions. [2021-03-10 21:17:35,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:35,825 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:35,825 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:36,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-03-10 21:17:36,026 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:36,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:36,026 INFO L82 PathProgramCache]: Analyzing trace with hash -519372456, now seen corresponding path program 22 times [2021-03-10 21:17:36,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:36,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411794836] [2021-03-10 21:17:36,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:36,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411794836] [2021-03-10 21:17:36,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584157223] [2021-03-10 21:17:36,069 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 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 [2021-03-10 21:17:36,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:17:36,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:36,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:36,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:36,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:36,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:17:36,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529579954] [2021-03-10 21:17:36,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:17:36,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:36,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:17:36,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:17:36,233 INFO L87 Difference]: Start difference. First operand 11650 states and 43592 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:37,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:37,044 INFO L93 Difference]: Finished difference Result 12450 states and 45603 transitions. [2021-03-10 21:17:37,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:17:37,045 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:37,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:37,067 INFO L225 Difference]: With dead ends: 12450 [2021-03-10 21:17:37,068 INFO L226 Difference]: Without dead ends: 12408 [2021-03-10 21:17:37,068 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 601.0ms TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:17:37,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12408 states. [2021-03-10 21:17:37,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12408 to 11734. [2021-03-10 21:17:37,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11734 states, 11733 states have (on average 3.737151623625671) internal successors, (43848), 11733 states have internal predecessors, (43848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:37,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11734 states to 11734 states and 43848 transitions. [2021-03-10 21:17:37,255 INFO L78 Accepts]: Start accepts. Automaton has 11734 states and 43848 transitions. Word has length 25 [2021-03-10 21:17:37,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:37,255 INFO L480 AbstractCegarLoop]: Abstraction has 11734 states and 43848 transitions. [2021-03-10 21:17:37,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:37,255 INFO L276 IsEmpty]: Start isEmpty. Operand 11734 states and 43848 transitions. [2021-03-10 21:17:37,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:37,271 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:37,271 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:37,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:37,472 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:37,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:37,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1810377428, now seen corresponding path program 23 times [2021-03-10 21:17:37,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:37,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507930490] [2021-03-10 21:17:37,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:37,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507930490] [2021-03-10 21:17:37,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569738147] [2021-03-10 21:17:37,519 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 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 [2021-03-10 21:17:37,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:17:37,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:37,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:17:37,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:37,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:37,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-03-10 21:17:37,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978394024] [2021-03-10 21:17:37,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:17:37,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:37,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:17:37,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:37,667 INFO L87 Difference]: Start difference. First operand 11734 states and 43848 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2021-03-10 21:17:38,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:38,335 INFO L93 Difference]: Finished difference Result 15314 states and 55511 transitions. [2021-03-10 21:17:38,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:17:38,336 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 25 [2021-03-10 21:17:38,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:38,363 INFO L225 Difference]: With dead ends: 15314 [2021-03-10 21:17:38,364 INFO L226 Difference]: Without dead ends: 15307 [2021-03-10 21:17:38,364 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 501.1ms TimeCoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:17:38,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15307 states. [2021-03-10 21:17:38,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15307 to 11671. [2021-03-10 21:17:38,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11671 states, 11670 states have (on average 3.739331619537275) internal successors, (43638), 11670 states have internal predecessors, (43638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:38,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11671 states to 11671 states and 43638 transitions. [2021-03-10 21:17:38,565 INFO L78 Accepts]: Start accepts. Automaton has 11671 states and 43638 transitions. Word has length 25 [2021-03-10 21:17:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:38,565 INFO L480 AbstractCegarLoop]: Abstraction has 11671 states and 43638 transitions. [2021-03-10 21:17:38,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2021-03-10 21:17:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 11671 states and 43638 transitions. [2021-03-10 21:17:38,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:38,581 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:38,582 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:38,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:38,782 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:38,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:38,782 INFO L82 PathProgramCache]: Analyzing trace with hash 22577300, now seen corresponding path program 24 times [2021-03-10 21:17:38,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:38,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906620992] [2021-03-10 21:17:38,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:38,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906620992] [2021-03-10 21:17:38,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918349082] [2021-03-10 21:17:38,834 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 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 [2021-03-10 21:17:38,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:17:38,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:38,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:38,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:38,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:38,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:17:38,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876769251] [2021-03-10 21:17:38,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:17:38,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:38,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:17:38,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:17:38,997 INFO L87 Difference]: Start difference. First operand 11671 states and 43638 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:39,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:39,556 INFO L93 Difference]: Finished difference Result 12355 states and 45427 transitions. [2021-03-10 21:17:39,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:17:39,557 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:39,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:39,579 INFO L225 Difference]: With dead ends: 12355 [2021-03-10 21:17:39,579 INFO L226 Difference]: Without dead ends: 12316 [2021-03-10 21:17:39,580 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 423.9ms TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:17:39,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12316 states. [2021-03-10 21:17:39,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12316 to 11732. [2021-03-10 21:17:39,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11732 states, 11731 states have (on average 3.734634728497144) internal successors, (43811), 11731 states have internal predecessors, (43811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:39,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11732 states to 11732 states and 43811 transitions. [2021-03-10 21:17:39,772 INFO L78 Accepts]: Start accepts. Automaton has 11732 states and 43811 transitions. Word has length 25 [2021-03-10 21:17:39,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:39,772 INFO L480 AbstractCegarLoop]: Abstraction has 11732 states and 43811 transitions. [2021-03-10 21:17:39,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:39,772 INFO L276 IsEmpty]: Start isEmpty. Operand 11732 states and 43811 transitions. [2021-03-10 21:17:39,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:39,789 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:39,789 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:39,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:39,989 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:39,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:39,990 INFO L82 PathProgramCache]: Analyzing trace with hash -375648860, now seen corresponding path program 25 times [2021-03-10 21:17:39,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:39,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532210271] [2021-03-10 21:17:39,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:40,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:40,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532210271] [2021-03-10 21:17:40,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522752889] [2021-03-10 21:17:40,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:17:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:40,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:17:40,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:40,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:40,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:17:40,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567845449] [2021-03-10 21:17:40,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:17:40,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:40,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:17:40,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:17:40,214 INFO L87 Difference]: Start difference. First operand 11732 states and 43811 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:17:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:40,689 INFO L93 Difference]: Finished difference Result 14434 states and 52619 transitions. [2021-03-10 21:17:40,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:17:40,690 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-03-10 21:17:40,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:40,774 INFO L225 Difference]: With dead ends: 14434 [2021-03-10 21:17:40,774 INFO L226 Difference]: Without dead ends: 14427 [2021-03-10 21:17:40,774 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 334.9ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:17:40,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14427 states. [2021-03-10 21:17:40,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14427 to 11763. [2021-03-10 21:17:40,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11763 states, 11762 states have (on average 3.735334126849175) internal successors, (43935), 11762 states have internal predecessors, (43935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11763 states to 11763 states and 43935 transitions. [2021-03-10 21:17:40,956 INFO L78 Accepts]: Start accepts. Automaton has 11763 states and 43935 transitions. Word has length 25 [2021-03-10 21:17:40,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:40,957 INFO L480 AbstractCegarLoop]: Abstraction has 11763 states and 43935 transitions. [2021-03-10 21:17:40,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:17:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 11763 states and 43935 transitions. [2021-03-10 21:17:40,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:40,975 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:40,975 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:41,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:41,175 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:41,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:41,176 INFO L82 PathProgramCache]: Analyzing trace with hash -2056092692, now seen corresponding path program 26 times [2021-03-10 21:17:41,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:41,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318543190] [2021-03-10 21:17:41,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:41,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318543190] [2021-03-10 21:17:41,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089329046] [2021-03-10 21:17:41,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:17:41,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:17:41,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:41,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:17:41,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:41,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:41,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:17:41,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544161659] [2021-03-10 21:17:41,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:17:41,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:41,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:17:41,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:17:41,383 INFO L87 Difference]: Start difference. First operand 11763 states and 43935 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:17:42,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:42,775 INFO L93 Difference]: Finished difference Result 18950 states and 66251 transitions. [2021-03-10 21:17:42,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:17:42,775 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-03-10 21:17:42,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:42,810 INFO L225 Difference]: With dead ends: 18950 [2021-03-10 21:17:42,811 INFO L226 Difference]: Without dead ends: 18922 [2021-03-10 21:17:42,811 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 949.9ms TimeCoverageRelationStatistics Valid=559, Invalid=1991, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:17:42,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18922 states. [2021-03-10 21:17:43,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18922 to 11915. [2021-03-10 21:17:43,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11915 states, 11914 states have (on average 3.732751384925298) internal successors, (44472), 11914 states have internal predecessors, (44472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:43,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11915 states to 11915 states and 44472 transitions. [2021-03-10 21:17:43,047 INFO L78 Accepts]: Start accepts. Automaton has 11915 states and 44472 transitions. Word has length 25 [2021-03-10 21:17:43,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:43,047 INFO L480 AbstractCegarLoop]: Abstraction has 11915 states and 44472 transitions. [2021-03-10 21:17:43,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:17:43,047 INFO L276 IsEmpty]: Start isEmpty. Operand 11915 states and 44472 transitions. [2021-03-10 21:17:43,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:43,064 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:43,064 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:43,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-03-10 21:17:43,265 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:43,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:43,265 INFO L82 PathProgramCache]: Analyzing trace with hash 839007340, now seen corresponding path program 27 times [2021-03-10 21:17:43,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:43,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185815677] [2021-03-10 21:17:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:43,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185815677] [2021-03-10 21:17:43,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572281723] [2021-03-10 21:17:43,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:17:43,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:17:43,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:43,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:43,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:43,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:43,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:17:43,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196028966] [2021-03-10 21:17:43,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:17:43,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:43,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:17:43,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:17:43,532 INFO L87 Difference]: Start difference. First operand 11915 states and 44472 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:44,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:44,771 INFO L93 Difference]: Finished difference Result 13312 states and 48066 transitions. [2021-03-10 21:17:44,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 21:17:44,772 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:44,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:44,795 INFO L225 Difference]: With dead ends: 13312 [2021-03-10 21:17:44,795 INFO L226 Difference]: Without dead ends: 13300 [2021-03-10 21:17:44,796 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 924.7ms TimeCoverageRelationStatistics Valid=759, Invalid=2663, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 21:17:44,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13300 states. [2021-03-10 21:17:44,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13300 to 11985. [2021-03-10 21:17:44,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11985 states, 11984 states have (on average 3.7298898531375166) internal successors, (44699), 11984 states have internal predecessors, (44699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:44,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11985 states to 11985 states and 44699 transitions. [2021-03-10 21:17:44,997 INFO L78 Accepts]: Start accepts. Automaton has 11985 states and 44699 transitions. Word has length 25 [2021-03-10 21:17:44,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:44,997 INFO L480 AbstractCegarLoop]: Abstraction has 11985 states and 44699 transitions. [2021-03-10 21:17:44,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:44,997 INFO L276 IsEmpty]: Start isEmpty. Operand 11985 states and 44699 transitions. [2021-03-10 21:17:45,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:45,014 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:45,014 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:45,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:45,214 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:45,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:45,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1160390052, now seen corresponding path program 28 times [2021-03-10 21:17:45,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:45,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417641916] [2021-03-10 21:17:45,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:45,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417641916] [2021-03-10 21:17:45,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084657850] [2021-03-10 21:17:45,250 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 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 [2021-03-10 21:17:45,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:17:45,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:45,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:45,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:45,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:45,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:17:45,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718741909] [2021-03-10 21:17:45,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:17:45,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:45,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:17:45,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:17:45,412 INFO L87 Difference]: Start difference. First operand 11985 states and 44699 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:46,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:46,439 INFO L93 Difference]: Finished difference Result 12947 states and 47187 transitions. [2021-03-10 21:17:46,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:17:46,440 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:46,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:46,463 INFO L225 Difference]: With dead ends: 12947 [2021-03-10 21:17:46,464 INFO L226 Difference]: Without dead ends: 12926 [2021-03-10 21:17:46,464 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 743.4ms TimeCoverageRelationStatistics Valid=545, Invalid=2005, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:17:46,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12926 states. [2021-03-10 21:17:46,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12926 to 11863. [2021-03-10 21:17:46,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11863 states, 11862 states have (on average 3.7376496374978925) internal successors, (44336), 11862 states have internal predecessors, (44336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:46,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11863 states to 11863 states and 44336 transitions. [2021-03-10 21:17:46,725 INFO L78 Accepts]: Start accepts. Automaton has 11863 states and 44336 transitions. Word has length 25 [2021-03-10 21:17:46,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:46,725 INFO L480 AbstractCegarLoop]: Abstraction has 11863 states and 44336 transitions. [2021-03-10 21:17:46,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:46,725 INFO L276 IsEmpty]: Start isEmpty. Operand 11863 states and 44336 transitions. [2021-03-10 21:17:46,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:46,741 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:46,741 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:46,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-03-10 21:17:46,942 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:46,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:46,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1590965864, now seen corresponding path program 29 times [2021-03-10 21:17:46,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:46,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064069768] [2021-03-10 21:17:46,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:46,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064069768] [2021-03-10 21:17:46,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901909868] [2021-03-10 21:17:46,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:17:47,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:17:47,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:47,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:47,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:47,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:47,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:17:47,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888541741] [2021-03-10 21:17:47,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:17:47,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:47,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:17:47,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:17:47,174 INFO L87 Difference]: Start difference. First operand 11863 states and 44336 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:48,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:48,150 INFO L93 Difference]: Finished difference Result 13151 states and 47733 transitions. [2021-03-10 21:17:48,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 21:17:48,151 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:48,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:48,177 INFO L225 Difference]: With dead ends: 13151 [2021-03-10 21:17:48,178 INFO L226 Difference]: Without dead ends: 13088 [2021-03-10 21:17:48,178 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 691.1ms TimeCoverageRelationStatistics Valid=494, Invalid=2158, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 21:17:48,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13088 states. [2021-03-10 21:17:48,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13088 to 11932. [2021-03-10 21:17:48,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11932 states, 11931 states have (on average 3.7329645461403067) internal successors, (44538), 11931 states have internal predecessors, (44538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:48,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11932 states to 11932 states and 44538 transitions. [2021-03-10 21:17:48,380 INFO L78 Accepts]: Start accepts. Automaton has 11932 states and 44538 transitions. Word has length 25 [2021-03-10 21:17:48,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:48,380 INFO L480 AbstractCegarLoop]: Abstraction has 11932 states and 44538 transitions. [2021-03-10 21:17:48,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:48,380 INFO L276 IsEmpty]: Start isEmpty. Operand 11932 states and 44538 transitions. [2021-03-10 21:17:48,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:48,397 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:48,397 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:48,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-03-10 21:17:48,597 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:48,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:48,598 INFO L82 PathProgramCache]: Analyzing trace with hash -855389204, now seen corresponding path program 30 times [2021-03-10 21:17:48,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:48,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391650137] [2021-03-10 21:17:48,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:48,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391650137] [2021-03-10 21:17:48,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695200238] [2021-03-10 21:17:48,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:17:48,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:17:48,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:48,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:17:48,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:48,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:48,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:17:48,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616203718] [2021-03-10 21:17:48,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:17:48,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:48,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:17:48,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:17:48,795 INFO L87 Difference]: Start difference. First operand 11932 states and 44538 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:17:49,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:49,916 INFO L93 Difference]: Finished difference Result 25464 states and 90243 transitions. [2021-03-10 21:17:49,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:17:49,917 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-03-10 21:17:49,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:49,972 INFO L225 Difference]: With dead ends: 25464 [2021-03-10 21:17:49,972 INFO L226 Difference]: Without dead ends: 25450 [2021-03-10 21:17:49,973 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 685.2ms TimeCoverageRelationStatistics Valid=432, Invalid=1290, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:17:49,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25450 states. [2021-03-10 21:17:50,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25450 to 13949. [2021-03-10 21:17:50,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13949 states, 13948 states have (on average 3.767923716661887) internal successors, (52555), 13948 states have internal predecessors, (52555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:50,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13949 states to 13949 states and 52555 transitions. [2021-03-10 21:17:50,350 INFO L78 Accepts]: Start accepts. Automaton has 13949 states and 52555 transitions. Word has length 25 [2021-03-10 21:17:50,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:50,351 INFO L480 AbstractCegarLoop]: Abstraction has 13949 states and 52555 transitions. [2021-03-10 21:17:50,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:17:50,351 INFO L276 IsEmpty]: Start isEmpty. Operand 13949 states and 52555 transitions. [2021-03-10 21:17:50,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:50,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:50,373 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:50,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-03-10 21:17:50,573 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:50,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:50,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1931977836, now seen corresponding path program 31 times [2021-03-10 21:17:50,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:50,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207490385] [2021-03-10 21:17:50,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:50,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207490385] [2021-03-10 21:17:50,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002932215] [2021-03-10 21:17:50,632 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 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 [2021-03-10 21:17:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:50,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:50,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:50,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:50,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:17:50,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555713911] [2021-03-10 21:17:50,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:17:50,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:50,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:17:50,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:17:50,792 INFO L87 Difference]: Start difference. First operand 13949 states and 52555 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:52,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:52,026 INFO L93 Difference]: Finished difference Result 16105 states and 58849 transitions. [2021-03-10 21:17:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 21:17:52,026 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:52,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:52,057 INFO L225 Difference]: With dead ends: 16105 [2021-03-10 21:17:52,058 INFO L226 Difference]: Without dead ends: 16097 [2021-03-10 21:17:52,058 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 864.5ms TimeCoverageRelationStatistics Valid=747, Invalid=2675, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 21:17:52,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16097 states. [2021-03-10 21:17:52,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16097 to 14207. [2021-03-10 21:17:52,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14207 states, 14206 states have (on average 3.766718288047304) internal successors, (53510), 14206 states have internal predecessors, (53510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:52,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14207 states to 14207 states and 53510 transitions. [2021-03-10 21:17:52,313 INFO L78 Accepts]: Start accepts. Automaton has 14207 states and 53510 transitions. Word has length 25 [2021-03-10 21:17:52,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:52,313 INFO L480 AbstractCegarLoop]: Abstraction has 14207 states and 53510 transitions. [2021-03-10 21:17:52,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:52,314 INFO L276 IsEmpty]: Start isEmpty. Operand 14207 states and 53510 transitions. [2021-03-10 21:17:52,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:52,335 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:52,335 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:52,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-03-10 21:17:52,535 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:52,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:52,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1914731100, now seen corresponding path program 32 times [2021-03-10 21:17:52,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:52,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862458081] [2021-03-10 21:17:52,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:52,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:52,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862458081] [2021-03-10 21:17:52,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810080141] [2021-03-10 21:17:52,575 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 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 [2021-03-10 21:17:52,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:17:52,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:52,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:52,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:52,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:52,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:17:52,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424059867] [2021-03-10 21:17:52,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:17:52,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:52,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:17:52,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:17:52,744 INFO L87 Difference]: Start difference. First operand 14207 states and 53510 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:54,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:54,414 INFO L93 Difference]: Finished difference Result 16652 states and 60233 transitions. [2021-03-10 21:17:54,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-10 21:17:54,415 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:54,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:54,446 INFO L225 Difference]: With dead ends: 16652 [2021-03-10 21:17:54,446 INFO L226 Difference]: Without dead ends: 16644 [2021-03-10 21:17:54,447 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1261.5ms TimeCoverageRelationStatistics Valid=1184, Invalid=4668, Unknown=0, NotChecked=0, Total=5852 [2021-03-10 21:17:54,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16644 states. [2021-03-10 21:17:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16644 to 14353. [2021-03-10 21:17:54,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14353 states, 14352 states have (on average 3.7623327759197323) internal successors, (53997), 14352 states have internal predecessors, (53997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:54,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14353 states to 14353 states and 53997 transitions. [2021-03-10 21:17:54,709 INFO L78 Accepts]: Start accepts. Automaton has 14353 states and 53997 transitions. Word has length 25 [2021-03-10 21:17:54,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:54,709 INFO L480 AbstractCegarLoop]: Abstraction has 14353 states and 53997 transitions. [2021-03-10 21:17:54,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:54,709 INFO L276 IsEmpty]: Start isEmpty. Operand 14353 states and 53997 transitions. [2021-03-10 21:17:54,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:54,732 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:54,732 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:54,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:54,932 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:54,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:54,933 INFO L82 PathProgramCache]: Analyzing trace with hash -2041606748, now seen corresponding path program 33 times [2021-03-10 21:17:54,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:54,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244101339] [2021-03-10 21:17:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:54,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:54,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244101339] [2021-03-10 21:17:54,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526197237] [2021-03-10 21:17:54,977 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 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 [2021-03-10 21:17:54,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:17:54,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:54,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:54,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:55,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:55,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:17:55,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393441390] [2021-03-10 21:17:55,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:17:55,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:55,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:17:55,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:17:55,150 INFO L87 Difference]: Start difference. First operand 14353 states and 53997 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:56,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:56,430 INFO L93 Difference]: Finished difference Result 16318 states and 59373 transitions. [2021-03-10 21:17:56,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 21:17:56,431 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:56,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:56,467 INFO L225 Difference]: With dead ends: 16318 [2021-03-10 21:17:56,467 INFO L226 Difference]: Without dead ends: 16297 [2021-03-10 21:17:56,468 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 845.7ms TimeCoverageRelationStatistics Valid=719, Invalid=2821, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 21:17:56,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16297 states. [2021-03-10 21:17:56,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16297 to 14217. [2021-03-10 21:17:56,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14217 states, 14216 states have (on average 3.7649831176139563) internal successors, (53523), 14216 states have internal predecessors, (53523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:56,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14217 states to 14217 states and 53523 transitions. [2021-03-10 21:17:56,784 INFO L78 Accepts]: Start accepts. Automaton has 14217 states and 53523 transitions. Word has length 25 [2021-03-10 21:17:56,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:56,784 INFO L480 AbstractCegarLoop]: Abstraction has 14217 states and 53523 transitions. [2021-03-10 21:17:56,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:56,784 INFO L276 IsEmpty]: Start isEmpty. Operand 14217 states and 53523 transitions. [2021-03-10 21:17:56,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:56,807 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:56,807 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:57,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:17:57,008 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:57,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:57,008 INFO L82 PathProgramCache]: Analyzing trace with hash 873025256, now seen corresponding path program 34 times [2021-03-10 21:17:57,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:57,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646111171] [2021-03-10 21:17:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:57,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646111171] [2021-03-10 21:17:57,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851477831] [2021-03-10 21:17:57,050 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 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 [2021-03-10 21:17:57,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:17:57,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:57,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:17:57,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:57,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:57,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:17:57,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097703537] [2021-03-10 21:17:57,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:17:57,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:57,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:17:57,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:17:57,218 INFO L87 Difference]: Start difference. First operand 14217 states and 53523 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:58,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:17:58,689 INFO L93 Difference]: Finished difference Result 17791 states and 64217 transitions. [2021-03-10 21:17:58,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 21:17:58,689 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:17:58,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:17:58,723 INFO L225 Difference]: With dead ends: 17791 [2021-03-10 21:17:58,724 INFO L226 Difference]: Without dead ends: 17783 [2021-03-10 21:17:58,724 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 952.7ms TimeCoverageRelationStatistics Valid=854, Invalid=2928, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 21:17:58,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17783 states. [2021-03-10 21:17:58,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17783 to 14184. [2021-03-10 21:17:58,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14184 states, 14183 states have (on average 3.768455192836494) internal successors, (53448), 14183 states have internal predecessors, (53448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:59,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14184 states to 14184 states and 53448 transitions. [2021-03-10 21:17:59,002 INFO L78 Accepts]: Start accepts. Automaton has 14184 states and 53448 transitions. Word has length 25 [2021-03-10 21:17:59,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:17:59,002 INFO L480 AbstractCegarLoop]: Abstraction has 14184 states and 53448 transitions. [2021-03-10 21:17:59,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:17:59,002 INFO L276 IsEmpty]: Start isEmpty. Operand 14184 states and 53448 transitions. [2021-03-10 21:17:59,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:17:59,028 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:17:59,028 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:17:59,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-03-10 21:17:59,229 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:17:59,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:17:59,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1319636132, now seen corresponding path program 35 times [2021-03-10 21:17:59,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:17:59,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154917110] [2021-03-10 21:17:59,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:17:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:17:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:59,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154917110] [2021-03-10 21:17:59,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700326275] [2021-03-10 21:17:59,272 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 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 [2021-03-10 21:17:59,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:17:59,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:17:59,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:17:59,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:17:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:17:59,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:17:59,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:17:59,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939415768] [2021-03-10 21:17:59,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:17:59,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:17:59,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:17:59,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:17:59,414 INFO L87 Difference]: Start difference. First operand 14184 states and 53448 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:00,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:00,327 INFO L93 Difference]: Finished difference Result 22000 states and 79243 transitions. [2021-03-10 21:18:00,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:18:00,328 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:18:00,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:00,457 INFO L225 Difference]: With dead ends: 22000 [2021-03-10 21:18:00,457 INFO L226 Difference]: Without dead ends: 21980 [2021-03-10 21:18:00,457 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 604.8ms TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:18:00,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21980 states. [2021-03-10 21:18:00,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21980 to 14177. [2021-03-10 21:18:00,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14177 states, 14176 states have (on average 3.766577313769752) internal successors, (53395), 14176 states have internal predecessors, (53395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:00,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14177 states to 14177 states and 53395 transitions. [2021-03-10 21:18:00,759 INFO L78 Accepts]: Start accepts. Automaton has 14177 states and 53395 transitions. Word has length 25 [2021-03-10 21:18:00,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:00,759 INFO L480 AbstractCegarLoop]: Abstraction has 14177 states and 53395 transitions. [2021-03-10 21:18:00,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:00,760 INFO L276 IsEmpty]: Start isEmpty. Operand 14177 states and 53395 transitions. [2021-03-10 21:18:00,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:18:00,782 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:00,782 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:00,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-03-10 21:18:00,983 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:00,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:00,983 INFO L82 PathProgramCache]: Analyzing trace with hash 184920788, now seen corresponding path program 36 times [2021-03-10 21:18:00,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:00,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946507006] [2021-03-10 21:18:00,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:01,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946507006] [2021-03-10 21:18:01,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308875699] [2021-03-10 21:18:01,028 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 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 [2021-03-10 21:18:01,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:18:01,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:01,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:18:01,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:01,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:01,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:18:01,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122157230] [2021-03-10 21:18:01,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:18:01,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:01,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:18:01,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:18:01,206 INFO L87 Difference]: Start difference. First operand 14177 states and 53395 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:02,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:02,024 INFO L93 Difference]: Finished difference Result 16102 states and 58957 transitions. [2021-03-10 21:18:02,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:18:02,025 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:18:02,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:02,057 INFO L225 Difference]: With dead ends: 16102 [2021-03-10 21:18:02,057 INFO L226 Difference]: Without dead ends: 16063 [2021-03-10 21:18:02,058 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 621.0ms TimeCoverageRelationStatistics Valid=414, Invalid=1392, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:18:02,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16063 states. [2021-03-10 21:18:02,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16063 to 14177. [2021-03-10 21:18:02,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14177 states, 14176 states have (on average 3.766577313769752) internal successors, (53395), 14176 states have internal predecessors, (53395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:02,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14177 states to 14177 states and 53395 transitions. [2021-03-10 21:18:02,330 INFO L78 Accepts]: Start accepts. Automaton has 14177 states and 53395 transitions. Word has length 25 [2021-03-10 21:18:02,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:02,330 INFO L480 AbstractCegarLoop]: Abstraction has 14177 states and 53395 transitions. [2021-03-10 21:18:02,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:02,331 INFO L276 IsEmpty]: Start isEmpty. Operand 14177 states and 53395 transitions. [2021-03-10 21:18:02,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:18:02,355 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:02,355 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:02,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-03-10 21:18:02,556 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:02,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:02,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1590938324, now seen corresponding path program 37 times [2021-03-10 21:18:02,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:02,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108459375] [2021-03-10 21:18:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:02,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108459375] [2021-03-10 21:18:02,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565670501] [2021-03-10 21:18:02,609 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 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 [2021-03-10 21:18:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:02,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:18:02,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:02,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:02,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:18:02,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71042496] [2021-03-10 21:18:02,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:18:02,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:02,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:18:02,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:18:02,773 INFO L87 Difference]: Start difference. First operand 14177 states and 53395 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:03,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:03,631 INFO L93 Difference]: Finished difference Result 16364 states and 59643 transitions. [2021-03-10 21:18:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:18:03,632 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:18:03,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:03,661 INFO L225 Difference]: With dead ends: 16364 [2021-03-10 21:18:03,662 INFO L226 Difference]: Without dead ends: 16325 [2021-03-10 21:18:03,662 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 591.0ms TimeCoverageRelationStatistics Valid=414, Invalid=1392, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:18:03,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16325 states. [2021-03-10 21:18:03,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16325 to 14230. [2021-03-10 21:18:03,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14230 states, 14229 states have (on average 3.7625975121231288) internal successors, (53538), 14229 states have internal predecessors, (53538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:03,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14230 states to 14230 states and 53538 transitions. [2021-03-10 21:18:03,920 INFO L78 Accepts]: Start accepts. Automaton has 14230 states and 53538 transitions. Word has length 25 [2021-03-10 21:18:03,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:03,920 INFO L480 AbstractCegarLoop]: Abstraction has 14230 states and 53538 transitions. [2021-03-10 21:18:03,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:03,920 INFO L276 IsEmpty]: Start isEmpty. Operand 14230 states and 53538 transitions. [2021-03-10 21:18:03,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:18:03,943 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:03,943 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:04,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:04,143 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:04,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:04,144 INFO L82 PathProgramCache]: Analyzing trace with hash -737296944, now seen corresponding path program 38 times [2021-03-10 21:18:04,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:04,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607753853] [2021-03-10 21:18:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:04,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607753853] [2021-03-10 21:18:04,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866962077] [2021-03-10 21:18:04,195 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 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 [2021-03-10 21:18:04,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:18:04,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:04,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:18:04,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:04,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:04,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:18:04,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975789201] [2021-03-10 21:18:04,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:18:04,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:04,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:18:04,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:18:04,357 INFO L87 Difference]: Start difference. First operand 14230 states and 53538 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:05,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:05,389 INFO L93 Difference]: Finished difference Result 17402 states and 62642 transitions. [2021-03-10 21:18:05,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 21:18:05,389 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:18:05,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:05,424 INFO L225 Difference]: With dead ends: 17402 [2021-03-10 21:18:05,424 INFO L226 Difference]: Without dead ends: 17346 [2021-03-10 21:18:05,425 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 756.9ms TimeCoverageRelationStatistics Valid=588, Invalid=1962, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:18:05,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17346 states. [2021-03-10 21:18:05,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17346 to 14300. [2021-03-10 21:18:05,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14300 states, 14299 states have (on average 3.7624309392265194) internal successors, (53799), 14299 states have internal predecessors, (53799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:05,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14300 states to 14300 states and 53799 transitions. [2021-03-10 21:18:05,723 INFO L78 Accepts]: Start accepts. Automaton has 14300 states and 53799 transitions. Word has length 25 [2021-03-10 21:18:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:05,723 INFO L480 AbstractCegarLoop]: Abstraction has 14300 states and 53799 transitions. [2021-03-10 21:18:05,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:05,723 INFO L276 IsEmpty]: Start isEmpty. Operand 14300 states and 53799 transitions. [2021-03-10 21:18:05,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:18:05,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:05,745 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:05,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:05,946 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:05,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:05,946 INFO L82 PathProgramCache]: Analyzing trace with hash 455169488, now seen corresponding path program 39 times [2021-03-10 21:18:05,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:05,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982779900] [2021-03-10 21:18:05,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:05,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982779900] [2021-03-10 21:18:05,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125128878] [2021-03-10 21:18:05,989 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 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 [2021-03-10 21:18:06,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:18:06,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:06,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:18:06,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:06,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:06,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:18:06,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058257007] [2021-03-10 21:18:06,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:18:06,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:06,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:18:06,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:18:06,155 INFO L87 Difference]: Start difference. First operand 14300 states and 53799 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:07,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:07,557 INFO L93 Difference]: Finished difference Result 17837 states and 63858 transitions. [2021-03-10 21:18:07,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 21:18:07,558 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:18:07,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:07,591 INFO L225 Difference]: With dead ends: 17837 [2021-03-10 21:18:07,591 INFO L226 Difference]: Without dead ends: 17809 [2021-03-10 21:18:07,592 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1041.8ms TimeCoverageRelationStatistics Valid=831, Invalid=2591, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 21:18:07,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17809 states. [2021-03-10 21:18:07,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17809 to 14629. [2021-03-10 21:18:07,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14629 states, 14628 states have (on average 3.7605961170358215) internal successors, (55010), 14628 states have internal predecessors, (55010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:07,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14629 states to 14629 states and 55010 transitions. [2021-03-10 21:18:07,931 INFO L78 Accepts]: Start accepts. Automaton has 14629 states and 55010 transitions. Word has length 25 [2021-03-10 21:18:07,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:07,931 INFO L480 AbstractCegarLoop]: Abstraction has 14629 states and 55010 transitions. [2021-03-10 21:18:07,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:07,931 INFO L276 IsEmpty]: Start isEmpty. Operand 14629 states and 55010 transitions. [2021-03-10 21:18:07,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:18:07,953 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:07,953 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:08,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-03-10 21:18:08,154 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:08,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:08,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1559764180, now seen corresponding path program 40 times [2021-03-10 21:18:08,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:08,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028459755] [2021-03-10 21:18:08,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:08,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028459755] [2021-03-10 21:18:08,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616432984] [2021-03-10 21:18:08,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:18:08,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:18:08,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:08,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:18:08,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:08,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:08,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:18:08,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634537311] [2021-03-10 21:18:08,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:18:08,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:08,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:18:08,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:18:08,358 INFO L87 Difference]: Start difference. First operand 14629 states and 55010 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-03-10 21:18:09,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:09,962 INFO L93 Difference]: Finished difference Result 18031 states and 64399 transitions. [2021-03-10 21:18:09,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-10 21:18:09,963 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-03-10 21:18:09,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:09,997 INFO L225 Difference]: With dead ends: 18031 [2021-03-10 21:18:09,997 INFO L226 Difference]: Without dead ends: 18031 [2021-03-10 21:18:09,997 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 1199.0ms TimeCoverageRelationStatistics Valid=1162, Invalid=3394, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 21:18:10,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18031 states. [2021-03-10 21:18:10,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18031 to 14473. [2021-03-10 21:18:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14473 states, 14472 states have (on average 3.7587064676616917) internal successors, (54396), 14472 states have internal predecessors, (54396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:10,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14473 states to 14473 states and 54396 transitions. [2021-03-10 21:18:10,292 INFO L78 Accepts]: Start accepts. Automaton has 14473 states and 54396 transitions. Word has length 25 [2021-03-10 21:18:10,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:10,292 INFO L480 AbstractCegarLoop]: Abstraction has 14473 states and 54396 transitions. [2021-03-10 21:18:10,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-03-10 21:18:10,292 INFO L276 IsEmpty]: Start isEmpty. Operand 14473 states and 54396 transitions. [2021-03-10 21:18:10,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:18:10,314 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:10,314 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:10,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-03-10 21:18:10,515 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:10,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:10,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1896120598, now seen corresponding path program 41 times [2021-03-10 21:18:10,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:10,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389815828] [2021-03-10 21:18:10,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:10,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389815828] [2021-03-10 21:18:10,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310194514] [2021-03-10 21:18:10,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:18:10,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:18:10,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:10,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:18:10,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:10,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:10,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:10,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:18:10,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953153062] [2021-03-10 21:18:10,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:18:10,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:10,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:18:10,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:18:10,701 INFO L87 Difference]: Start difference. First operand 14473 states and 54396 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:13,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:13,090 INFO L93 Difference]: Finished difference Result 35647 states and 127415 transitions. [2021-03-10 21:18:13,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-03-10 21:18:13,091 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:18:13,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:13,168 INFO L225 Difference]: With dead ends: 35647 [2021-03-10 21:18:13,168 INFO L226 Difference]: Without dead ends: 35617 [2021-03-10 21:18:13,169 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2985 ImplicationChecksByTransitivity, 1521.8ms TimeCoverageRelationStatistics Valid=1753, Invalid=6257, Unknown=0, NotChecked=0, Total=8010 [2021-03-10 21:18:13,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35617 states. [2021-03-10 21:18:13,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35617 to 18774. [2021-03-10 21:18:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18774 states, 18773 states have (on average 3.835082299046503) internal successors, (71996), 18773 states have internal predecessors, (71996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:13,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18774 states to 18774 states and 71996 transitions. [2021-03-10 21:18:13,651 INFO L78 Accepts]: Start accepts. Automaton has 18774 states and 71996 transitions. Word has length 25 [2021-03-10 21:18:13,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:13,651 INFO L480 AbstractCegarLoop]: Abstraction has 18774 states and 71996 transitions. [2021-03-10 21:18:13,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:13,652 INFO L276 IsEmpty]: Start isEmpty. Operand 18774 states and 71996 transitions. [2021-03-10 21:18:13,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:18:13,683 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:13,683 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:13,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:13,884 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:13,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:13,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1420289254, now seen corresponding path program 42 times [2021-03-10 21:18:13,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:13,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980886048] [2021-03-10 21:18:13,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:13,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980886048] [2021-03-10 21:18:13,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244041925] [2021-03-10 21:18:13,920 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 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 [2021-03-10 21:18:13,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:18:13,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:13,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:18:13,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:14,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:14,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:18:14,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614517175] [2021-03-10 21:18:14,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:18:14,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:14,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:18:14,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:18:14,087 INFO L87 Difference]: Start difference. First operand 18774 states and 71996 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:18:16,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:16,490 INFO L93 Difference]: Finished difference Result 41975 states and 148341 transitions. [2021-03-10 21:18:16,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-03-10 21:18:16,491 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-03-10 21:18:16,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:16,587 INFO L225 Difference]: With dead ends: 41975 [2021-03-10 21:18:16,588 INFO L226 Difference]: Without dead ends: 41947 [2021-03-10 21:18:16,588 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2445 ImplicationChecksByTransitivity, 1561.7ms TimeCoverageRelationStatistics Valid=1622, Invalid=5020, Unknown=0, NotChecked=0, Total=6642 [2021-03-10 21:18:16,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41947 states. [2021-03-10 21:18:17,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41947 to 17457. [2021-03-10 21:18:17,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17457 states, 17456 states have (on average 3.817942254812099) internal successors, (66646), 17456 states have internal predecessors, (66646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:17,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17457 states to 17457 states and 66646 transitions. [2021-03-10 21:18:17,116 INFO L78 Accepts]: Start accepts. Automaton has 17457 states and 66646 transitions. Word has length 25 [2021-03-10 21:18:17,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:17,116 INFO L480 AbstractCegarLoop]: Abstraction has 17457 states and 66646 transitions. [2021-03-10 21:18:17,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:18:17,116 INFO L276 IsEmpty]: Start isEmpty. Operand 17457 states and 66646 transitions. [2021-03-10 21:18:17,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:18:17,144 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:17,144 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:17,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-03-10 21:18:17,345 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:17,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:17,345 INFO L82 PathProgramCache]: Analyzing trace with hash 463223062, now seen corresponding path program 43 times [2021-03-10 21:18:17,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:17,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999747161] [2021-03-10 21:18:17,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:17,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999747161] [2021-03-10 21:18:17,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280699288] [2021-03-10 21:18:17,390 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 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 [2021-03-10 21:18:17,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:17,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:18:17,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:17,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:17,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:18:17,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198645135] [2021-03-10 21:18:17,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:18:17,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:17,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:18:17,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:18:17,534 INFO L87 Difference]: Start difference. First operand 17457 states and 66646 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:19,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:19,787 INFO L93 Difference]: Finished difference Result 36580 states and 131067 transitions. [2021-03-10 21:18:19,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-03-10 21:18:19,788 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:18:19,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:19,997 INFO L225 Difference]: With dead ends: 36580 [2021-03-10 21:18:19,997 INFO L226 Difference]: Without dead ends: 36556 [2021-03-10 21:18:19,997 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2617 ImplicationChecksByTransitivity, 1426.8ms TimeCoverageRelationStatistics Valid=1644, Invalid=5666, Unknown=0, NotChecked=0, Total=7310 [2021-03-10 21:18:20,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36556 states. [2021-03-10 21:18:20,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36556 to 18518. [2021-03-10 21:18:20,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18518 states, 18517 states have (on average 3.856510233839175) internal successors, (71411), 18517 states have internal predecessors, (71411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:20,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18518 states to 18518 states and 71411 transitions. [2021-03-10 21:18:20,472 INFO L78 Accepts]: Start accepts. Automaton has 18518 states and 71411 transitions. Word has length 25 [2021-03-10 21:18:20,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:20,472 INFO L480 AbstractCegarLoop]: Abstraction has 18518 states and 71411 transitions. [2021-03-10 21:18:20,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:20,472 INFO L276 IsEmpty]: Start isEmpty. Operand 18518 states and 71411 transitions. [2021-03-10 21:18:20,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:18:20,499 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:20,499 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:20,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:20,700 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:20,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:20,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1441780506, now seen corresponding path program 44 times [2021-03-10 21:18:20,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:20,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106251364] [2021-03-10 21:18:20,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:20,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106251364] [2021-03-10 21:18:20,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892137223] [2021-03-10 21:18:20,739 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 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 [2021-03-10 21:18:20,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:18:20,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:20,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:18:20,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:20,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:20,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:18:20,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914742455] [2021-03-10 21:18:20,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:18:20,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:20,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:18:20,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:18:20,884 INFO L87 Difference]: Start difference. First operand 18518 states and 71411 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:18:22,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:22,834 INFO L93 Difference]: Finished difference Result 41528 states and 148376 transitions. [2021-03-10 21:18:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-10 21:18:22,835 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-03-10 21:18:22,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:22,929 INFO L225 Difference]: With dead ends: 41528 [2021-03-10 21:18:22,929 INFO L226 Difference]: Without dead ends: 41528 [2021-03-10 21:18:22,929 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 1230.0ms TimeCoverageRelationStatistics Valid=1246, Invalid=3584, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 21:18:22,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41528 states. [2021-03-10 21:18:23,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41528 to 18785. [2021-03-10 21:18:23,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18785 states, 18784 states have (on average 3.8521081771720613) internal successors, (72358), 18784 states have internal predecessors, (72358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:23,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18785 states to 18785 states and 72358 transitions. [2021-03-10 21:18:23,584 INFO L78 Accepts]: Start accepts. Automaton has 18785 states and 72358 transitions. Word has length 25 [2021-03-10 21:18:23,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:23,584 INFO L480 AbstractCegarLoop]: Abstraction has 18785 states and 72358 transitions. [2021-03-10 21:18:23,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:18:23,584 INFO L276 IsEmpty]: Start isEmpty. Operand 18785 states and 72358 transitions. [2021-03-10 21:18:23,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:18:23,613 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:23,613 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:23,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-03-10 21:18:23,815 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:23,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:23,815 INFO L82 PathProgramCache]: Analyzing trace with hash -830468258, now seen corresponding path program 45 times [2021-03-10 21:18:23,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:23,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572441072] [2021-03-10 21:18:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:23,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572441072] [2021-03-10 21:18:23,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870580378] [2021-03-10 21:18:23,861 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 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 [2021-03-10 21:18:23,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:18:23,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:23,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:18:23,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:24,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:24,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:18:24,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124346130] [2021-03-10 21:18:24,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:18:24,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:24,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:18:24,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:18:24,035 INFO L87 Difference]: Start difference. First operand 18785 states and 72358 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:25,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:25,857 INFO L93 Difference]: Finished difference Result 27513 states and 99519 transitions. [2021-03-10 21:18:25,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-03-10 21:18:25,858 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:18:25,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:25,919 INFO L225 Difference]: With dead ends: 27513 [2021-03-10 21:18:25,919 INFO L226 Difference]: Without dead ends: 27489 [2021-03-10 21:18:25,920 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 1176.6ms TimeCoverageRelationStatistics Valid=1260, Invalid=4746, Unknown=0, NotChecked=0, Total=6006 [2021-03-10 21:18:25,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27489 states. [2021-03-10 21:18:26,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27489 to 18811. [2021-03-10 21:18:26,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18811 states, 18810 states have (on average 3.8517278043593834) internal successors, (72451), 18810 states have internal predecessors, (72451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:26,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18811 states to 18811 states and 72451 transitions. [2021-03-10 21:18:26,364 INFO L78 Accepts]: Start accepts. Automaton has 18811 states and 72451 transitions. Word has length 25 [2021-03-10 21:18:26,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:26,364 INFO L480 AbstractCegarLoop]: Abstraction has 18811 states and 72451 transitions. [2021-03-10 21:18:26,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:26,364 INFO L276 IsEmpty]: Start isEmpty. Operand 18811 states and 72451 transitions. [2021-03-10 21:18:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:18:26,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:26,393 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:26,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:26,593 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:26,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:26,593 INFO L82 PathProgramCache]: Analyzing trace with hash 470709726, now seen corresponding path program 46 times [2021-03-10 21:18:26,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:26,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557730240] [2021-03-10 21:18:26,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:26,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557730240] [2021-03-10 21:18:26,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347111765] [2021-03-10 21:18:26,631 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 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 [2021-03-10 21:18:26,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:18:26,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:26,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:18:26,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:26,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:26,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:18:26,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072860127] [2021-03-10 21:18:26,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:18:26,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:26,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:18:26,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:18:26,776 INFO L87 Difference]: Start difference. First operand 18811 states and 72451 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:28,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:28,210 INFO L93 Difference]: Finished difference Result 26218 states and 95948 transitions. [2021-03-10 21:18:28,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 21:18:28,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:18:28,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:28,268 INFO L225 Difference]: With dead ends: 26218 [2021-03-10 21:18:28,268 INFO L226 Difference]: Without dead ends: 26184 [2021-03-10 21:18:28,268 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 893.1ms TimeCoverageRelationStatistics Valid=755, Invalid=2551, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 21:18:28,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26184 states. [2021-03-10 21:18:28,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26184 to 18809. [2021-03-10 21:18:28,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18809 states, 18808 states have (on average 3.8517120374308806) internal successors, (72443), 18808 states have internal predecessors, (72443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:28,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18809 states to 18809 states and 72443 transitions. [2021-03-10 21:18:28,694 INFO L78 Accepts]: Start accepts. Automaton has 18809 states and 72443 transitions. Word has length 25 [2021-03-10 21:18:28,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:28,694 INFO L480 AbstractCegarLoop]: Abstraction has 18809 states and 72443 transitions. [2021-03-10 21:18:28,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:28,694 INFO L276 IsEmpty]: Start isEmpty. Operand 18809 states and 72443 transitions. [2021-03-10 21:18:28,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:18:28,722 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:28,722 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:28,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-03-10 21:18:28,923 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:28,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:28,923 INFO L82 PathProgramCache]: Analyzing trace with hash 472331746, now seen corresponding path program 47 times [2021-03-10 21:18:28,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:28,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958002406] [2021-03-10 21:18:28,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:28,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958002406] [2021-03-10 21:18:28,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279847335] [2021-03-10 21:18:28,961 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 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 [2021-03-10 21:18:28,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:18:28,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:28,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:18:28,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:29,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:29,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:18:29,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015379569] [2021-03-10 21:18:29,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:18:29,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:29,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:18:29,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:18:29,109 INFO L87 Difference]: Start difference. First operand 18809 states and 72443 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:18:31,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:31,153 INFO L93 Difference]: Finished difference Result 44899 states and 160666 transitions. [2021-03-10 21:18:31,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-10 21:18:31,154 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-03-10 21:18:31,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:31,258 INFO L225 Difference]: With dead ends: 44899 [2021-03-10 21:18:31,258 INFO L226 Difference]: Without dead ends: 44892 [2021-03-10 21:18:31,259 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 1344.8ms TimeCoverageRelationStatistics Valid=1348, Invalid=4054, Unknown=0, NotChecked=0, Total=5402 [2021-03-10 21:18:31,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44892 states. [2021-03-10 21:18:31,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44892 to 19185. [2021-03-10 21:18:31,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19185 states, 19184 states have (on average 3.875260633861551) internal successors, (74343), 19184 states have internal predecessors, (74343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:31,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19185 states to 19185 states and 74343 transitions. [2021-03-10 21:18:31,958 INFO L78 Accepts]: Start accepts. Automaton has 19185 states and 74343 transitions. Word has length 25 [2021-03-10 21:18:31,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:31,958 INFO L480 AbstractCegarLoop]: Abstraction has 19185 states and 74343 transitions. [2021-03-10 21:18:31,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:18:31,959 INFO L276 IsEmpty]: Start isEmpty. Operand 19185 states and 74343 transitions. [2021-03-10 21:18:31,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:18:31,990 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:31,990 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:32,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:32,191 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:32,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:32,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1647610214, now seen corresponding path program 48 times [2021-03-10 21:18:32,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:32,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371245977] [2021-03-10 21:18:32,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:32,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371245977] [2021-03-10 21:18:32,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857607783] [2021-03-10 21:18:32,238 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 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 [2021-03-10 21:18:32,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:18:32,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:32,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:18:32,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:32,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:32,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:18:32,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790298533] [2021-03-10 21:18:32,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:18:32,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:32,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:18:32,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:18:32,430 INFO L87 Difference]: Start difference. First operand 19185 states and 74343 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:34,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:34,247 INFO L93 Difference]: Finished difference Result 37958 states and 137798 transitions. [2021-03-10 21:18:34,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-10 21:18:34,248 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:18:34,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:34,334 INFO L225 Difference]: With dead ends: 37958 [2021-03-10 21:18:34,334 INFO L226 Difference]: Without dead ends: 37918 [2021-03-10 21:18:34,334 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 1143.0ms TimeCoverageRelationStatistics Valid=1088, Invalid=3604, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 21:18:34,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37918 states. [2021-03-10 21:18:34,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37918 to 19182. [2021-03-10 21:18:34,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19182 states, 19181 states have (on average 3.8743548303008186) internal successors, (74314), 19181 states have internal predecessors, (74314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:35,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19182 states to 19182 states and 74314 transitions. [2021-03-10 21:18:35,009 INFO L78 Accepts]: Start accepts. Automaton has 19182 states and 74314 transitions. Word has length 25 [2021-03-10 21:18:35,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:35,009 INFO L480 AbstractCegarLoop]: Abstraction has 19182 states and 74314 transitions. [2021-03-10 21:18:35,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:35,009 INFO L276 IsEmpty]: Start isEmpty. Operand 19182 states and 74314 transitions. [2021-03-10 21:18:35,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:18:35,042 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:35,042 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:35,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:35,242 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:35,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:35,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1462510574, now seen corresponding path program 49 times [2021-03-10 21:18:35,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:35,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342042001] [2021-03-10 21:18:35,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:35,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342042001] [2021-03-10 21:18:35,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612863984] [2021-03-10 21:18:35,295 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 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 [2021-03-10 21:18:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:35,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:18:35,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:35,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:35,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:18:35,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491779395] [2021-03-10 21:18:35,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:18:35,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:35,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:18:35,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:18:35,445 INFO L87 Difference]: Start difference. First operand 19182 states and 74314 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:18:38,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:38,065 INFO L93 Difference]: Finished difference Result 43788 states and 155142 transitions. [2021-03-10 21:18:38,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-03-10 21:18:38,067 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-03-10 21:18:38,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:38,168 INFO L225 Difference]: With dead ends: 43788 [2021-03-10 21:18:38,168 INFO L226 Difference]: Without dead ends: 43753 [2021-03-10 21:18:38,169 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 1721.1ms TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2021-03-10 21:18:38,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43753 states. [2021-03-10 21:18:38,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43753 to 22487. [2021-03-10 21:18:38,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22487 states, 22486 states have (on average 3.8633816596993684) internal successors, (86872), 22486 states have internal predecessors, (86872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22487 states to 22487 states and 86872 transitions. [2021-03-10 21:18:38,947 INFO L78 Accepts]: Start accepts. Automaton has 22487 states and 86872 transitions. Word has length 25 [2021-03-10 21:18:38,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:38,947 INFO L480 AbstractCegarLoop]: Abstraction has 22487 states and 86872 transitions. [2021-03-10 21:18:38,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:18:38,947 INFO L276 IsEmpty]: Start isEmpty. Operand 22487 states and 86872 transitions. [2021-03-10 21:18:38,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:18:38,982 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:38,982 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:39,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:39,183 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:39,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:39,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1491412058, now seen corresponding path program 50 times [2021-03-10 21:18:39,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:39,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881486199] [2021-03-10 21:18:39,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:39,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:39,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881486199] [2021-03-10 21:18:39,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991519166] [2021-03-10 21:18:39,228 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 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 [2021-03-10 21:18:39,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:18:39,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:39,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:18:39,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:39,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:39,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:39,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:18:39,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156519279] [2021-03-10 21:18:39,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:18:39,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:39,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:18:39,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:18:39,390 INFO L87 Difference]: Start difference. First operand 22487 states and 86872 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:18:40,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:40,917 INFO L93 Difference]: Finished difference Result 34933 states and 127285 transitions. [2021-03-10 21:18:40,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:18:40,919 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-03-10 21:18:40,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:41,004 INFO L225 Difference]: With dead ends: 34933 [2021-03-10 21:18:41,004 INFO L226 Difference]: Without dead ends: 34912 [2021-03-10 21:18:41,004 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1022.0ms TimeCoverageRelationStatistics Valid=517, Invalid=1835, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 21:18:41,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34912 states. [2021-03-10 21:18:41,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34912 to 22735. [2021-03-10 21:18:41,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22735 states, 22734 states have (on average 3.8544910706430895) internal successors, (87628), 22734 states have internal predecessors, (87628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:41,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22735 states to 22735 states and 87628 transitions. [2021-03-10 21:18:41,602 INFO L78 Accepts]: Start accepts. Automaton has 22735 states and 87628 transitions. Word has length 25 [2021-03-10 21:18:41,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:41,602 INFO L480 AbstractCegarLoop]: Abstraction has 22735 states and 87628 transitions. [2021-03-10 21:18:41,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:18:41,602 INFO L276 IsEmpty]: Start isEmpty. Operand 22735 states and 87628 transitions. [2021-03-10 21:18:41,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:18:41,635 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:41,636 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:41,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-03-10 21:18:41,836 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:41,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:41,836 INFO L82 PathProgramCache]: Analyzing trace with hash -340397470, now seen corresponding path program 51 times [2021-03-10 21:18:41,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:41,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509296393] [2021-03-10 21:18:41,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:41,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509296393] [2021-03-10 21:18:41,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131905555] [2021-03-10 21:18:41,880 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 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 [2021-03-10 21:18:41,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:18:41,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:41,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:18:41,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:42,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:42,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:18:42,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975590238] [2021-03-10 21:18:42,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:18:42,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:42,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:18:42,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:18:42,037 INFO L87 Difference]: Start difference. First operand 22735 states and 87628 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:18:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:43,059 INFO L93 Difference]: Finished difference Result 39052 states and 142123 transitions. [2021-03-10 21:18:43,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:18:43,060 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-03-10 21:18:43,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:43,148 INFO L225 Difference]: With dead ends: 39052 [2021-03-10 21:18:43,149 INFO L226 Difference]: Without dead ends: 39052 [2021-03-10 21:18:43,149 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 659.1ms TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:18:43,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-03-10 21:18:43,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 23152. [2021-03-10 21:18:44,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23152 states, 23151 states have (on average 3.8622089758541747) internal successors, (89414), 23151 states have internal predecessors, (89414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:44,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23152 states to 23152 states and 89414 transitions. [2021-03-10 21:18:44,065 INFO L78 Accepts]: Start accepts. Automaton has 23152 states and 89414 transitions. Word has length 25 [2021-03-10 21:18:44,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:44,065 INFO L480 AbstractCegarLoop]: Abstraction has 23152 states and 89414 transitions. [2021-03-10 21:18:44,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:18:44,066 INFO L276 IsEmpty]: Start isEmpty. Operand 23152 states and 89414 transitions. [2021-03-10 21:18:44,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:18:44,102 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:44,102 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:44,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:44,303 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:44,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:44,303 INFO L82 PathProgramCache]: Analyzing trace with hash 2136719838, now seen corresponding path program 52 times [2021-03-10 21:18:44,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:44,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32320212] [2021-03-10 21:18:44,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:44,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32320212] [2021-03-10 21:18:44,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049914542] [2021-03-10 21:18:44,377 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 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 [2021-03-10 21:18:44,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:18:44,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:44,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:18:44,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:44,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:44,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:18:44,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012529106] [2021-03-10 21:18:44,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:18:44,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:44,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:18:44,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:18:44,619 INFO L87 Difference]: Start difference. First operand 23152 states and 89414 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:45,209 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-03-10 21:18:47,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:47,004 INFO L93 Difference]: Finished difference Result 36484 states and 134220 transitions. [2021-03-10 21:18:47,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-03-10 21:18:47,005 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:18:47,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:47,088 INFO L225 Difference]: With dead ends: 36484 [2021-03-10 21:18:47,089 INFO L226 Difference]: Without dead ends: 36484 [2021-03-10 21:18:47,089 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 1599.3ms TimeCoverageRelationStatistics Valid=1100, Invalid=4302, Unknown=0, NotChecked=0, Total=5402 [2021-03-10 21:18:47,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36484 states. [2021-03-10 21:18:47,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36484 to 23276. [2021-03-10 21:18:47,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23276 states, 23275 states have (on average 3.866122448979592) internal successors, (89984), 23275 states have internal predecessors, (89984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:47,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23276 states to 23276 states and 89984 transitions. [2021-03-10 21:18:47,681 INFO L78 Accepts]: Start accepts. Automaton has 23276 states and 89984 transitions. Word has length 25 [2021-03-10 21:18:47,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:47,681 INFO L480 AbstractCegarLoop]: Abstraction has 23276 states and 89984 transitions. [2021-03-10 21:18:47,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:47,681 INFO L276 IsEmpty]: Start isEmpty. Operand 23276 states and 89984 transitions. [2021-03-10 21:18:47,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:18:47,719 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:47,719 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:47,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-03-10 21:18:47,919 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:47,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:47,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1764860382, now seen corresponding path program 53 times [2021-03-10 21:18:47,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:47,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7533453] [2021-03-10 21:18:47,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:47,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7533453] [2021-03-10 21:18:47,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902571232] [2021-03-10 21:18:47,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:47,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:18:47,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:47,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:18:47,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:48,253 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-03-10 21:18:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:48,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:48,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:18:48,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596958401] [2021-03-10 21:18:48,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:18:48,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:48,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:18:48,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:18:48,338 INFO L87 Difference]: Start difference. First operand 23276 states and 89984 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:50,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:50,494 INFO L93 Difference]: Finished difference Result 36924 states and 135962 transitions. [2021-03-10 21:18:50,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-10 21:18:50,495 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:18:50,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:50,572 INFO L225 Difference]: With dead ends: 36924 [2021-03-10 21:18:50,572 INFO L226 Difference]: Without dead ends: 36924 [2021-03-10 21:18:50,573 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 1436.0ms TimeCoverageRelationStatistics Valid=1145, Invalid=4555, Unknown=0, NotChecked=0, Total=5700 [2021-03-10 21:18:50,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36924 states. [2021-03-10 21:18:51,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36924 to 23342. [2021-03-10 21:18:51,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23342 states, 23341 states have (on average 3.8635876783342615) internal successors, (90180), 23341 states have internal predecessors, (90180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:51,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23342 states to 23342 states and 90180 transitions. [2021-03-10 21:18:51,168 INFO L78 Accepts]: Start accepts. Automaton has 23342 states and 90180 transitions. Word has length 25 [2021-03-10 21:18:51,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:51,168 INFO L480 AbstractCegarLoop]: Abstraction has 23342 states and 90180 transitions. [2021-03-10 21:18:51,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:51,169 INFO L276 IsEmpty]: Start isEmpty. Operand 23342 states and 90180 transitions. [2021-03-10 21:18:51,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:18:51,206 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:51,206 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:51,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-03-10 21:18:51,407 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:51,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:51,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1834627866, now seen corresponding path program 54 times [2021-03-10 21:18:51,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:51,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665121920] [2021-03-10 21:18:51,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:51,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665121920] [2021-03-10 21:18:51,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998272989] [2021-03-10 21:18:51,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:51,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:18:51,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:51,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:18:51,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:51,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:51,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:18:51,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788105228] [2021-03-10 21:18:51,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:18:51,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:51,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:18:51,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:18:51,609 INFO L87 Difference]: Start difference. First operand 23342 states and 90180 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:52,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:52,833 INFO L93 Difference]: Finished difference Result 36712 states and 134265 transitions. [2021-03-10 21:18:52,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:18:52,834 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:18:52,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:53,052 INFO L225 Difference]: With dead ends: 36712 [2021-03-10 21:18:53,052 INFO L226 Difference]: Without dead ends: 36694 [2021-03-10 21:18:53,052 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 675.9ms TimeCoverageRelationStatistics Valid=366, Invalid=1356, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:18:53,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36694 states. [2021-03-10 21:18:53,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36694 to 23302. [2021-03-10 21:18:53,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23302 states, 23301 states have (on average 3.860478091069053) internal successors, (89953), 23301 states have internal predecessors, (89953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:53,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23302 states to 23302 states and 89953 transitions. [2021-03-10 21:18:53,601 INFO L78 Accepts]: Start accepts. Automaton has 23302 states and 89953 transitions. Word has length 25 [2021-03-10 21:18:53,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:53,601 INFO L480 AbstractCegarLoop]: Abstraction has 23302 states and 89953 transitions. [2021-03-10 21:18:53,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:53,601 INFO L276 IsEmpty]: Start isEmpty. Operand 23302 states and 89953 transitions. [2021-03-10 21:18:53,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:18:53,635 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:53,635 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:53,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:53,843 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:53,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:53,843 INFO L82 PathProgramCache]: Analyzing trace with hash 2007733018, now seen corresponding path program 55 times [2021-03-10 21:18:53,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:53,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709076673] [2021-03-10 21:18:53,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:53,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709076673] [2021-03-10 21:18:53,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871750441] [2021-03-10 21:18:53,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:53,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:18:53,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:54,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:54,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:18:54,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687759761] [2021-03-10 21:18:54,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:18:54,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:54,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:18:54,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:18:54,123 INFO L87 Difference]: Start difference. First operand 23302 states and 89953 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:56,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:18:56,584 INFO L93 Difference]: Finished difference Result 30537 states and 112209 transitions. [2021-03-10 21:18:56,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-10 21:18:56,585 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:18:56,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:18:56,661 INFO L225 Difference]: With dead ends: 30537 [2021-03-10 21:18:56,661 INFO L226 Difference]: Without dead ends: 30533 [2021-03-10 21:18:56,662 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 1649.1ms TimeCoverageRelationStatistics Valid=1261, Invalid=4439, Unknown=0, NotChecked=0, Total=5700 [2021-03-10 21:18:56,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30533 states. [2021-03-10 21:18:57,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30533 to 23633. [2021-03-10 21:18:57,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23633 states, 23632 states have (on average 3.8681872037914693) internal successors, (91413), 23632 states have internal predecessors, (91413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:57,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23633 states to 23633 states and 91413 transitions. [2021-03-10 21:18:57,349 INFO L78 Accepts]: Start accepts. Automaton has 23633 states and 91413 transitions. Word has length 25 [2021-03-10 21:18:57,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:18:57,349 INFO L480 AbstractCegarLoop]: Abstraction has 23633 states and 91413 transitions. [2021-03-10 21:18:57,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:57,350 INFO L276 IsEmpty]: Start isEmpty. Operand 23633 states and 91413 transitions. [2021-03-10 21:18:57,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:18:57,390 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:18:57,390 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:18:57,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:18:57,595 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:18:57,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:18:57,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1250552554, now seen corresponding path program 56 times [2021-03-10 21:18:57,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:18:57,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618360069] [2021-03-10 21:18:57,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:18:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:18:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:57,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618360069] [2021-03-10 21:18:57,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650493873] [2021-03-10 21:18:57,645 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 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 [2021-03-10 21:18:57,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:18:57,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:18:57,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:18:57,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:18:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:18:57,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:18:57,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:18:57,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103977094] [2021-03-10 21:18:57,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:18:57,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:18:57,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:18:57,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:18:57,833 INFO L87 Difference]: Start difference. First operand 23633 states and 91413 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:18:58,944 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-03-10 21:19:00,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:00,006 INFO L93 Difference]: Finished difference Result 30537 states and 112384 transitions. [2021-03-10 21:19:00,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-03-10 21:19:00,007 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:19:00,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:00,077 INFO L225 Difference]: With dead ends: 30537 [2021-03-10 21:19:00,078 INFO L226 Difference]: Without dead ends: 30531 [2021-03-10 21:19:00,078 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 1474.2ms TimeCoverageRelationStatistics Valid=1160, Invalid=4096, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 21:19:00,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30531 states. [2021-03-10 21:19:00,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30531 to 23624. [2021-03-10 21:19:00,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23624 states, 23623 states have (on average 3.866274393599458) internal successors, (91333), 23623 states have internal predecessors, (91333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23624 states to 23624 states and 91333 transitions. [2021-03-10 21:19:00,757 INFO L78 Accepts]: Start accepts. Automaton has 23624 states and 91333 transitions. Word has length 25 [2021-03-10 21:19:00,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:00,757 INFO L480 AbstractCegarLoop]: Abstraction has 23624 states and 91333 transitions. [2021-03-10 21:19:00,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:00,757 INFO L276 IsEmpty]: Start isEmpty. Operand 23624 states and 91333 transitions. [2021-03-10 21:19:00,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:19:00,798 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:00,798 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:00,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-03-10 21:19:00,999 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:00,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:00,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1799330538, now seen corresponding path program 57 times [2021-03-10 21:19:00,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:00,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180370260] [2021-03-10 21:19:00,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:01,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180370260] [2021-03-10 21:19:01,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424554624] [2021-03-10 21:19:01,048 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 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 [2021-03-10 21:19:01,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:19:01,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:01,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:19:01,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:01,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:01,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:01,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:19:01,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860393765] [2021-03-10 21:19:01,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:19:01,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:01,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:19:01,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:19:01,242 INFO L87 Difference]: Start difference. First operand 23624 states and 91333 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:03,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:03,031 INFO L93 Difference]: Finished difference Result 26398 states and 99464 transitions. [2021-03-10 21:19:03,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-10 21:19:03,032 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:19:03,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:03,093 INFO L225 Difference]: With dead ends: 26398 [2021-03-10 21:19:03,093 INFO L226 Difference]: Without dead ends: 26377 [2021-03-10 21:19:03,093 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 1061.3ms TimeCoverageRelationStatistics Valid=814, Invalid=3092, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 21:19:03,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26377 states. [2021-03-10 21:19:03,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26377 to 23720. [2021-03-10 21:19:03,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23720 states, 23719 states have (on average 3.8643281757241033) internal successors, (91658), 23719 states have internal predecessors, (91658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:03,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23720 states to 23720 states and 91658 transitions. [2021-03-10 21:19:03,731 INFO L78 Accepts]: Start accepts. Automaton has 23720 states and 91658 transitions. Word has length 25 [2021-03-10 21:19:03,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:03,731 INFO L480 AbstractCegarLoop]: Abstraction has 23720 states and 91658 transitions. [2021-03-10 21:19:03,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:03,731 INFO L276 IsEmpty]: Start isEmpty. Operand 23720 states and 91658 transitions. [2021-03-10 21:19:03,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:19:03,771 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:03,771 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:03,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:03,971 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:03,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:03,972 INFO L82 PathProgramCache]: Analyzing trace with hash -694735846, now seen corresponding path program 58 times [2021-03-10 21:19:03,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:03,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850957609] [2021-03-10 21:19:03,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:04,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850957609] [2021-03-10 21:19:04,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822119047] [2021-03-10 21:19:04,037 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 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 [2021-03-10 21:19:04,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:19:04,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:04,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:19:04,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:04,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:04,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:19:04,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051398810] [2021-03-10 21:19:04,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:19:04,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:04,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:19:04,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:19:04,232 INFO L87 Difference]: Start difference. First operand 23720 states and 91658 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-03-10 21:19:06,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:06,374 INFO L93 Difference]: Finished difference Result 26773 states and 100488 transitions. [2021-03-10 21:19:06,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-10 21:19:06,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-03-10 21:19:06,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:06,447 INFO L225 Difference]: With dead ends: 26773 [2021-03-10 21:19:06,447 INFO L226 Difference]: Without dead ends: 26767 [2021-03-10 21:19:06,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 1369.6ms TimeCoverageRelationStatistics Valid=1157, Invalid=4245, Unknown=0, NotChecked=0, Total=5402 [2021-03-10 21:19:06,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26767 states. [2021-03-10 21:19:06,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26767 to 23647. [2021-03-10 21:19:06,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23647 states, 23646 states have (on average 3.8645859764865094) internal successors, (91382), 23646 states have internal predecessors, (91382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:07,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23647 states to 23647 states and 91382 transitions. [2021-03-10 21:19:07,018 INFO L78 Accepts]: Start accepts. Automaton has 23647 states and 91382 transitions. Word has length 25 [2021-03-10 21:19:07,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:07,019 INFO L480 AbstractCegarLoop]: Abstraction has 23647 states and 91382 transitions. [2021-03-10 21:19:07,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-03-10 21:19:07,019 INFO L276 IsEmpty]: Start isEmpty. Operand 23647 states and 91382 transitions. [2021-03-10 21:19:07,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:19:07,058 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:07,058 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:07,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:07,258 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:07,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:07,259 INFO L82 PathProgramCache]: Analyzing trace with hash -715975424, now seen corresponding path program 59 times [2021-03-10 21:19:07,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:07,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304046397] [2021-03-10 21:19:07,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:07,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304046397] [2021-03-10 21:19:07,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903127215] [2021-03-10 21:19:07,311 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 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 [2021-03-10 21:19:07,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:19:07,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:07,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:19:07,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:07,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:07,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:19:07,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879513972] [2021-03-10 21:19:07,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:19:07,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:07,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:19:07,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:19:07,495 INFO L87 Difference]: Start difference. First operand 23647 states and 91382 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:08,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:08,566 INFO L93 Difference]: Finished difference Result 34026 states and 126260 transitions. [2021-03-10 21:19:08,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:19:08,567 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:19:08,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:08,642 INFO L225 Difference]: With dead ends: 34026 [2021-03-10 21:19:08,643 INFO L226 Difference]: Without dead ends: 33998 [2021-03-10 21:19:08,643 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 793.6ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:19:08,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33998 states. [2021-03-10 21:19:09,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33998 to 23641. [2021-03-10 21:19:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23641 states, 23640 states have (on average 3.8629441624365484) internal successors, (91320), 23640 states have internal predecessors, (91320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:09,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23641 states to 23641 states and 91320 transitions. [2021-03-10 21:19:09,240 INFO L78 Accepts]: Start accepts. Automaton has 23641 states and 91320 transitions. Word has length 25 [2021-03-10 21:19:09,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:09,240 INFO L480 AbstractCegarLoop]: Abstraction has 23641 states and 91320 transitions. [2021-03-10 21:19:09,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:09,240 INFO L276 IsEmpty]: Start isEmpty. Operand 23641 states and 91320 transitions. [2021-03-10 21:19:09,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:19:09,274 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:09,275 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:09,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:09,476 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:09,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:09,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1721582306, now seen corresponding path program 60 times [2021-03-10 21:19:09,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:09,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464120168] [2021-03-10 21:19:09,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:09,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464120168] [2021-03-10 21:19:09,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25460581] [2021-03-10 21:19:09,529 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 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 [2021-03-10 21:19:09,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:19:09,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:09,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:19:09,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:09,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:09,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:19:09,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058957206] [2021-03-10 21:19:09,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:19:09,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:09,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:19:09,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:19:09,716 INFO L87 Difference]: Start difference. First operand 23641 states and 91320 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:10,561 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-10 21:19:11,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:11,257 INFO L93 Difference]: Finished difference Result 27117 states and 102184 transitions. [2021-03-10 21:19:11,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 21:19:11,258 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:19:11,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:11,329 INFO L225 Difference]: With dead ends: 27117 [2021-03-10 21:19:11,329 INFO L226 Difference]: Without dead ends: 27075 [2021-03-10 21:19:11,329 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1043.1ms TimeCoverageRelationStatistics Valid=595, Invalid=2161, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 21:19:11,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27075 states. [2021-03-10 21:19:11,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27075 to 23872. [2021-03-10 21:19:11,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23872 states, 23871 states have (on average 3.8621339700892294) internal successors, (92193), 23871 states have internal predecessors, (92193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:11,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23872 states to 23872 states and 92193 transitions. [2021-03-10 21:19:11,865 INFO L78 Accepts]: Start accepts. Automaton has 23872 states and 92193 transitions. Word has length 25 [2021-03-10 21:19:11,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:11,865 INFO L480 AbstractCegarLoop]: Abstraction has 23872 states and 92193 transitions. [2021-03-10 21:19:11,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:11,865 INFO L276 IsEmpty]: Start isEmpty. Operand 23872 states and 92193 transitions. [2021-03-10 21:19:11,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:19:11,899 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:11,899 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:12,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-03-10 21:19:12,103 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:12,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:12,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1187692774, now seen corresponding path program 61 times [2021-03-10 21:19:12,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:12,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452852177] [2021-03-10 21:19:12,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:12,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452852177] [2021-03-10 21:19:12,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085904589] [2021-03-10 21:19:12,159 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 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 [2021-03-10 21:19:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:12,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:19:12,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:12,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:12,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:12,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:19:12,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322001875] [2021-03-10 21:19:12,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:19:12,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:12,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:19:12,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:19:12,354 INFO L87 Difference]: Start difference. First operand 23872 states and 92193 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:14,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:14,133 INFO L93 Difference]: Finished difference Result 28292 states and 105726 transitions. [2021-03-10 21:19:14,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 21:19:14,134 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:19:14,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:14,211 INFO L225 Difference]: With dead ends: 28292 [2021-03-10 21:19:14,211 INFO L226 Difference]: Without dead ends: 28257 [2021-03-10 21:19:14,211 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1206.4ms TimeCoverageRelationStatistics Valid=714, Invalid=2478, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 21:19:14,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28257 states. [2021-03-10 21:19:14,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28257 to 24245. [2021-03-10 21:19:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24245 states, 24244 states have (on average 3.8590166639168455) internal successors, (93558), 24244 states have internal predecessors, (93558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:14,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24245 states to 24245 states and 93558 transitions. [2021-03-10 21:19:14,857 INFO L78 Accepts]: Start accepts. Automaton has 24245 states and 93558 transitions. Word has length 25 [2021-03-10 21:19:14,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:14,857 INFO L480 AbstractCegarLoop]: Abstraction has 24245 states and 93558 transitions. [2021-03-10 21:19:14,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:14,857 INFO L276 IsEmpty]: Start isEmpty. Operand 24245 states and 93558 transitions. [2021-03-10 21:19:14,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:19:14,899 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:14,899 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:15,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-03-10 21:19:15,101 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:15,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:15,101 INFO L82 PathProgramCache]: Analyzing trace with hash -83098082, now seen corresponding path program 62 times [2021-03-10 21:19:15,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:15,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147713742] [2021-03-10 21:19:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:15,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147713742] [2021-03-10 21:19:15,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440435941] [2021-03-10 21:19:15,158 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 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 [2021-03-10 21:19:15,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:19:15,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:15,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:19:15,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:15,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:15,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:19:15,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185213456] [2021-03-10 21:19:15,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:19:15,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:15,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:19:15,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:19:15,365 INFO L87 Difference]: Start difference. First operand 24245 states and 93558 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-03-10 21:19:16,147 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 12 [2021-03-10 21:19:17,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:17,353 INFO L93 Difference]: Finished difference Result 28749 states and 107022 transitions. [2021-03-10 21:19:17,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-10 21:19:17,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-03-10 21:19:17,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:17,414 INFO L225 Difference]: With dead ends: 28749 [2021-03-10 21:19:17,414 INFO L226 Difference]: Without dead ends: 28749 [2021-03-10 21:19:17,415 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1374.6ms TimeCoverageRelationStatistics Valid=915, Invalid=2991, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 21:19:17,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28749 states. [2021-03-10 21:19:17,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28749 to 24026. [2021-03-10 21:19:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24026 states, 24025 states have (on average 3.861893860561915) internal successors, (92782), 24025 states have internal predecessors, (92782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:18,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24026 states to 24026 states and 92782 transitions. [2021-03-10 21:19:18,009 INFO L78 Accepts]: Start accepts. Automaton has 24026 states and 92782 transitions. Word has length 25 [2021-03-10 21:19:18,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:18,009 INFO L480 AbstractCegarLoop]: Abstraction has 24026 states and 92782 transitions. [2021-03-10 21:19:18,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-03-10 21:19:18,009 INFO L276 IsEmpty]: Start isEmpty. Operand 24026 states and 92782 transitions. [2021-03-10 21:19:18,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:19:18,050 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:18,050 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:18,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-03-10 21:19:18,256 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:18,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:18,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1085733342, now seen corresponding path program 63 times [2021-03-10 21:19:18,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:18,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734796798] [2021-03-10 21:19:18,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:18,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734796798] [2021-03-10 21:19:18,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899274818] [2021-03-10 21:19:18,328 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 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 [2021-03-10 21:19:18,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:19:18,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:18,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:19:18,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:18,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:18,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:19:18,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784750937] [2021-03-10 21:19:18,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:19:18,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:18,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:19:18,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:19:18,536 INFO L87 Difference]: Start difference. First operand 24026 states and 92782 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:18,835 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-03-10 21:19:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:20,726 INFO L93 Difference]: Finished difference Result 29221 states and 108781 transitions. [2021-03-10 21:19:20,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 21:19:20,727 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:19:20,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:20,797 INFO L225 Difference]: With dead ends: 29221 [2021-03-10 21:19:20,797 INFO L226 Difference]: Without dead ends: 29217 [2021-03-10 21:19:20,798 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 1450.8ms TimeCoverageRelationStatistics Valid=804, Invalid=2502, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 21:19:20,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29217 states. [2021-03-10 21:19:21,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29217 to 24082. [2021-03-10 21:19:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24082 states, 24081 states have (on average 3.8637099788214777) internal successors, (93042), 24081 states have internal predecessors, (93042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:21,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24082 states to 24082 states and 93042 transitions. [2021-03-10 21:19:21,399 INFO L78 Accepts]: Start accepts. Automaton has 24082 states and 93042 transitions. Word has length 25 [2021-03-10 21:19:21,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:21,400 INFO L480 AbstractCegarLoop]: Abstraction has 24082 states and 93042 transitions. [2021-03-10 21:19:21,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:21,400 INFO L276 IsEmpty]: Start isEmpty. Operand 24082 states and 93042 transitions. [2021-03-10 21:19:21,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:19:21,440 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:21,440 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:21,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-03-10 21:19:21,641 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:21,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:21,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2122415066, now seen corresponding path program 64 times [2021-03-10 21:19:21,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:21,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230220918] [2021-03-10 21:19:21,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:21,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:19:21,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230220918] [2021-03-10 21:19:21,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364851039] [2021-03-10 21:19:21,693 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 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 [2021-03-10 21:19:21,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:19:21,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:21,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:19:21,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:21,972 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-03-10 21:19:22,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:22,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:22,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:19:22,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419736994] [2021-03-10 21:19:22,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:19:22,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:22,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:19:22,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:19:22,038 INFO L87 Difference]: Start difference. First operand 24082 states and 93042 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:23,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:23,874 INFO L93 Difference]: Finished difference Result 29744 states and 110313 transitions. [2021-03-10 21:19:23,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 21:19:23,875 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:19:23,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:24,061 INFO L225 Difference]: With dead ends: 29744 [2021-03-10 21:19:24,061 INFO L226 Difference]: Without dead ends: 29744 [2021-03-10 21:19:24,062 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1339.7ms TimeCoverageRelationStatistics Valid=793, Invalid=2513, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 21:19:24,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29744 states. [2021-03-10 21:19:24,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29744 to 24037. [2021-03-10 21:19:24,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24037 states, 24036 states have (on average 3.8625395240472624) internal successors, (92840), 24036 states have internal predecessors, (92840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:24,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24037 states to 24037 states and 92840 transitions. [2021-03-10 21:19:24,508 INFO L78 Accepts]: Start accepts. Automaton has 24037 states and 92840 transitions. Word has length 25 [2021-03-10 21:19:24,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:24,508 INFO L480 AbstractCegarLoop]: Abstraction has 24037 states and 92840 transitions. [2021-03-10 21:19:24,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:24,508 INFO L276 IsEmpty]: Start isEmpty. Operand 24037 states and 92840 transitions. [2021-03-10 21:19:24,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:19:24,549 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:24,549 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:24,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-03-10 21:19:24,750 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:24,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:24,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1922178658, now seen corresponding path program 65 times [2021-03-10 21:19:24,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:24,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139960848] [2021-03-10 21:19:24,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:24,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139960848] [2021-03-10 21:19:24,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156318241] [2021-03-10 21:19:24,800 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 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 [2021-03-10 21:19:24,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:19:24,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:24,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:19:24,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:25,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:25,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:19:25,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741027003] [2021-03-10 21:19:25,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:19:25,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:25,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:19:25,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:19:25,081 INFO L87 Difference]: Start difference. First operand 24037 states and 92840 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:26,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:26,123 INFO L93 Difference]: Finished difference Result 27264 states and 102651 transitions. [2021-03-10 21:19:26,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:19:26,124 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:19:26,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:26,193 INFO L225 Difference]: With dead ends: 27264 [2021-03-10 21:19:26,194 INFO L226 Difference]: Without dead ends: 27186 [2021-03-10 21:19:26,194 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 729.9ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:19:26,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27186 states. [2021-03-10 21:19:26,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27186 to 24037. [2021-03-10 21:19:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24037 states, 24036 states have (on average 3.8620402729239474) internal successors, (92828), 24036 states have internal predecessors, (92828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24037 states to 24037 states and 92828 transitions. [2021-03-10 21:19:26,734 INFO L78 Accepts]: Start accepts. Automaton has 24037 states and 92828 transitions. Word has length 25 [2021-03-10 21:19:26,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:26,734 INFO L480 AbstractCegarLoop]: Abstraction has 24037 states and 92828 transitions. [2021-03-10 21:19:26,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:26,734 INFO L276 IsEmpty]: Start isEmpty. Operand 24037 states and 92828 transitions. [2021-03-10 21:19:26,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:19:26,769 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:26,769 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:26,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:26,970 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:26,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:26,970 INFO L82 PathProgramCache]: Analyzing trace with hash -516161122, now seen corresponding path program 66 times [2021-03-10 21:19:26,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:26,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211095910] [2021-03-10 21:19:26,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:27,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211095910] [2021-03-10 21:19:27,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475256219] [2021-03-10 21:19:27,020 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 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 [2021-03-10 21:19:27,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:19:27,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:27,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:19:27,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:27,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:27,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:19:27,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948022110] [2021-03-10 21:19:27,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:19:27,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:27,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:19:27,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:19:27,212 INFO L87 Difference]: Start difference. First operand 24037 states and 92828 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:28,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:28,420 INFO L93 Difference]: Finished difference Result 27092 states and 102183 transitions. [2021-03-10 21:19:28,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:19:28,421 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:19:28,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:28,494 INFO L225 Difference]: With dead ends: 27092 [2021-03-10 21:19:28,494 INFO L226 Difference]: Without dead ends: 27014 [2021-03-10 21:19:28,494 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 760.3ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:19:28,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27014 states. [2021-03-10 21:19:28,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27014 to 24197. [2021-03-10 21:19:29,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24197 states, 24196 states have (on average 3.8581997024301535) internal successors, (93353), 24196 states have internal predecessors, (93353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:29,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24197 states to 24197 states and 93353 transitions. [2021-03-10 21:19:29,091 INFO L78 Accepts]: Start accepts. Automaton has 24197 states and 93353 transitions. Word has length 25 [2021-03-10 21:19:29,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:29,091 INFO L480 AbstractCegarLoop]: Abstraction has 24197 states and 93353 transitions. [2021-03-10 21:19:29,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:29,091 INFO L276 IsEmpty]: Start isEmpty. Operand 24197 states and 93353 transitions. [2021-03-10 21:19:29,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:19:29,129 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:29,130 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:29,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-03-10 21:19:29,330 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:29,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:29,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1450570906, now seen corresponding path program 67 times [2021-03-10 21:19:29,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:29,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656963711] [2021-03-10 21:19:29,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:29,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656963711] [2021-03-10 21:19:29,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109689939] [2021-03-10 21:19:29,378 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 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 [2021-03-10 21:19:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:29,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:19:29,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:29,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:29,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:19:29,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320584640] [2021-03-10 21:19:29,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:19:29,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:29,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:19:29,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:19:29,577 INFO L87 Difference]: Start difference. First operand 24197 states and 93353 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:31,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:31,140 INFO L93 Difference]: Finished difference Result 29237 states and 108599 transitions. [2021-03-10 21:19:31,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:19:31,142 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:19:31,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:31,217 INFO L225 Difference]: With dead ends: 29237 [2021-03-10 21:19:31,217 INFO L226 Difference]: Without dead ends: 29132 [2021-03-10 21:19:31,218 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 964.8ms TimeCoverageRelationStatistics Valid=632, Invalid=2020, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 21:19:31,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29132 states. [2021-03-10 21:19:31,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29132 to 24578. [2021-03-10 21:19:31,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24578 states, 24577 states have (on average 3.8505920169263947) internal successors, (94636), 24577 states have internal predecessors, (94636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:31,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24578 states to 24578 states and 94636 transitions. [2021-03-10 21:19:31,914 INFO L78 Accepts]: Start accepts. Automaton has 24578 states and 94636 transitions. Word has length 25 [2021-03-10 21:19:31,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:31,914 INFO L480 AbstractCegarLoop]: Abstraction has 24578 states and 94636 transitions. [2021-03-10 21:19:31,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:31,914 INFO L276 IsEmpty]: Start isEmpty. Operand 24578 states and 94636 transitions. [2021-03-10 21:19:31,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:19:31,958 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:31,958 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:32,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-03-10 21:19:32,158 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:32,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:32,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1651929958, now seen corresponding path program 68 times [2021-03-10 21:19:32,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:32,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881854129] [2021-03-10 21:19:32,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:32,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881854129] [2021-03-10 21:19:32,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786677185] [2021-03-10 21:19:32,212 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 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 [2021-03-10 21:19:32,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:19:32,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:32,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:19:32,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:32,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:32,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:19:32,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981810686] [2021-03-10 21:19:32,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:19:32,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:32,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:19:32,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:19:32,410 INFO L87 Difference]: Start difference. First operand 24578 states and 94636 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:34,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:34,230 INFO L93 Difference]: Finished difference Result 30260 states and 111728 transitions. [2021-03-10 21:19:34,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 21:19:34,232 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:19:34,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:34,301 INFO L225 Difference]: With dead ends: 30260 [2021-03-10 21:19:34,301 INFO L226 Difference]: Without dead ends: 30225 [2021-03-10 21:19:34,302 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 1193.6ms TimeCoverageRelationStatistics Valid=856, Invalid=2566, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 21:19:34,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30225 states. [2021-03-10 21:19:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30225 to 25387. [2021-03-10 21:19:34,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25387 states, 25386 states have (on average 3.8439691168360515) internal successors, (97583), 25386 states have internal predecessors, (97583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:34,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25387 states to 25387 states and 97583 transitions. [2021-03-10 21:19:34,991 INFO L78 Accepts]: Start accepts. Automaton has 25387 states and 97583 transitions. Word has length 25 [2021-03-10 21:19:34,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:34,991 INFO L480 AbstractCegarLoop]: Abstraction has 25387 states and 97583 transitions. [2021-03-10 21:19:34,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:34,991 INFO L276 IsEmpty]: Start isEmpty. Operand 25387 states and 97583 transitions. [2021-03-10 21:19:35,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:19:35,039 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:35,039 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:35,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:35,240 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:35,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:35,240 INFO L82 PathProgramCache]: Analyzing trace with hash -547335266, now seen corresponding path program 69 times [2021-03-10 21:19:35,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:35,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755701961] [2021-03-10 21:19:35,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:35,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755701961] [2021-03-10 21:19:35,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785227692] [2021-03-10 21:19:35,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:19:35,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:19:35,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:35,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:19:35,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:35,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:35,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:19:35,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006109194] [2021-03-10 21:19:35,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:19:35,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:35,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:19:35,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:19:35,511 INFO L87 Difference]: Start difference. First operand 25387 states and 97583 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-03-10 21:19:37,027 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2021-03-10 21:19:37,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:37,618 INFO L93 Difference]: Finished difference Result 30555 states and 112516 transitions. [2021-03-10 21:19:37,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-10 21:19:37,619 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-03-10 21:19:37,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:37,684 INFO L225 Difference]: With dead ends: 30555 [2021-03-10 21:19:37,684 INFO L226 Difference]: Without dead ends: 30555 [2021-03-10 21:19:37,684 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 1539.1ms TimeCoverageRelationStatistics Valid=1072, Invalid=2960, Unknown=0, NotChecked=0, Total=4032 [2021-03-10 21:19:37,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30555 states. [2021-03-10 21:19:38,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30555 to 24735. [2021-03-10 21:19:38,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24735 states, 24734 states have (on average 3.8523894234656746) internal successors, (95285), 24734 states have internal predecessors, (95285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:38,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24735 states to 24735 states and 95285 transitions. [2021-03-10 21:19:38,315 INFO L78 Accepts]: Start accepts. Automaton has 24735 states and 95285 transitions. Word has length 25 [2021-03-10 21:19:38,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:38,315 INFO L480 AbstractCegarLoop]: Abstraction has 24735 states and 95285 transitions. [2021-03-10 21:19:38,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-03-10 21:19:38,315 INFO L276 IsEmpty]: Start isEmpty. Operand 24735 states and 95285 transitions. [2021-03-10 21:19:38,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:19:38,353 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:38,353 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:38,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:38,554 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:38,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:38,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1344648230, now seen corresponding path program 70 times [2021-03-10 21:19:38,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:38,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415920460] [2021-03-10 21:19:38,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:38,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415920460] [2021-03-10 21:19:38,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256801513] [2021-03-10 21:19:38,623 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 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 [2021-03-10 21:19:38,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:19:38,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:38,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:19:38,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:38,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:38,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:19:38,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113289183] [2021-03-10 21:19:38,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:19:38,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:38,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:19:38,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:19:38,818 INFO L87 Difference]: Start difference. First operand 24735 states and 95285 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:40,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:40,342 INFO L93 Difference]: Finished difference Result 29274 states and 109319 transitions. [2021-03-10 21:19:40,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 21:19:40,344 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:19:40,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:40,410 INFO L225 Difference]: With dead ends: 29274 [2021-03-10 21:19:40,410 INFO L226 Difference]: Without dead ends: 29190 [2021-03-10 21:19:40,411 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 890.5ms TimeCoverageRelationStatistics Valid=554, Invalid=1996, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:19:40,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29190 states. [2021-03-10 21:19:41,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29190 to 24885. [2021-03-10 21:19:41,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24885 states, 24884 states have (on average 3.8572174891496545) internal successors, (95983), 24884 states have internal predecessors, (95983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:41,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24885 states to 24885 states and 95983 transitions. [2021-03-10 21:19:41,157 INFO L78 Accepts]: Start accepts. Automaton has 24885 states and 95983 transitions. Word has length 25 [2021-03-10 21:19:41,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:41,157 INFO L480 AbstractCegarLoop]: Abstraction has 24885 states and 95983 transitions. [2021-03-10 21:19:41,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:41,157 INFO L276 IsEmpty]: Start isEmpty. Operand 24885 states and 95983 transitions. [2021-03-10 21:19:41,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:19:41,206 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:41,206 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:41,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:41,407 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:41,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:41,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1878537762, now seen corresponding path program 71 times [2021-03-10 21:19:41,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:41,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690519542] [2021-03-10 21:19:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:41,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690519542] [2021-03-10 21:19:41,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338151429] [2021-03-10 21:19:41,469 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 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 [2021-03-10 21:19:41,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:19:41,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:41,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:19:41,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:41,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:41,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:19:41,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634682652] [2021-03-10 21:19:41,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:19:41,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:41,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:19:41,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:19:41,711 INFO L87 Difference]: Start difference. First operand 24885 states and 95983 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:43,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:43,617 INFO L93 Difference]: Finished difference Result 30288 states and 112309 transitions. [2021-03-10 21:19:43,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 21:19:43,618 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:19:43,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:43,693 INFO L225 Difference]: With dead ends: 30288 [2021-03-10 21:19:43,693 INFO L226 Difference]: Without dead ends: 30239 [2021-03-10 21:19:43,693 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 1157.2ms TimeCoverageRelationStatistics Valid=763, Invalid=2659, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 21:19:43,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30239 states. [2021-03-10 21:19:44,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30239 to 25177. [2021-03-10 21:19:44,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25177 states, 25176 states have (on average 3.852240228789323) internal successors, (96984), 25176 states have internal predecessors, (96984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:44,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25177 states to 25177 states and 96984 transitions. [2021-03-10 21:19:44,466 INFO L78 Accepts]: Start accepts. Automaton has 25177 states and 96984 transitions. Word has length 25 [2021-03-10 21:19:44,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:44,466 INFO L480 AbstractCegarLoop]: Abstraction has 25177 states and 96984 transitions. [2021-03-10 21:19:44,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:44,467 INFO L276 IsEmpty]: Start isEmpty. Operand 25177 states and 96984 transitions. [2021-03-10 21:19:44,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:19:44,512 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:44,512 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:44,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:44,727 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:44,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:44,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1311834842, now seen corresponding path program 72 times [2021-03-10 21:19:44,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:44,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430735017] [2021-03-10 21:19:44,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:44,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430735017] [2021-03-10 21:19:44,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684811706] [2021-03-10 21:19:44,780 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 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 [2021-03-10 21:19:44,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:19:44,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:44,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:19:44,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:44,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:44,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:19:44,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519344272] [2021-03-10 21:19:44,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:19:44,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:44,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:19:44,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:19:44,977 INFO L87 Difference]: Start difference. First operand 25177 states and 96984 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-03-10 21:19:47,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:47,089 INFO L93 Difference]: Finished difference Result 30750 states and 113565 transitions. [2021-03-10 21:19:47,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-10 21:19:47,090 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-03-10 21:19:47,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:47,171 INFO L225 Difference]: With dead ends: 30750 [2021-03-10 21:19:47,171 INFO L226 Difference]: Without dead ends: 30750 [2021-03-10 21:19:47,172 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 1340.6ms TimeCoverageRelationStatistics Valid=1000, Invalid=3290, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 21:19:47,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30750 states. [2021-03-10 21:19:47,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30750 to 24767. [2021-03-10 21:19:47,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24767 states, 24766 states have (on average 3.85887910845514) internal successors, (95569), 24766 states have internal predecessors, (95569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:47,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24767 states to 24767 states and 95569 transitions. [2021-03-10 21:19:47,925 INFO L78 Accepts]: Start accepts. Automaton has 24767 states and 95569 transitions. Word has length 25 [2021-03-10 21:19:47,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:47,925 INFO L480 AbstractCegarLoop]: Abstraction has 24767 states and 95569 transitions. [2021-03-10 21:19:47,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-03-10 21:19:47,925 INFO L276 IsEmpty]: Start isEmpty. Operand 24767 states and 95569 transitions. [2021-03-10 21:19:47,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:19:47,968 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:47,968 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:48,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-03-10 21:19:48,168 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:48,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:48,169 INFO L82 PathProgramCache]: Analyzing trace with hash -118473758, now seen corresponding path program 73 times [2021-03-10 21:19:48,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:48,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983761342] [2021-03-10 21:19:48,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:48,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:48,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983761342] [2021-03-10 21:19:48,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674243413] [2021-03-10 21:19:48,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:48,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:19:48,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:48,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:48,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:19:48,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607916735] [2021-03-10 21:19:48,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:19:48,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:48,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:19:48,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:19:48,460 INFO L87 Difference]: Start difference. First operand 24767 states and 95569 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:50,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:50,711 INFO L93 Difference]: Finished difference Result 29361 states and 109742 transitions. [2021-03-10 21:19:50,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-10 21:19:50,712 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:19:50,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:50,779 INFO L225 Difference]: With dead ends: 29361 [2021-03-10 21:19:50,779 INFO L226 Difference]: Without dead ends: 29361 [2021-03-10 21:19:50,779 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 1376.8ms TimeCoverageRelationStatistics Valid=933, Invalid=2973, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 21:19:50,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29361 states. [2021-03-10 21:19:51,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29361 to 25043. [2021-03-10 21:19:51,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25043 states, 25042 states have (on average 3.864188163884674) internal successors, (96767), 25042 states have internal predecessors, (96767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:51,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25043 states to 25043 states and 96767 transitions. [2021-03-10 21:19:51,331 INFO L78 Accepts]: Start accepts. Automaton has 25043 states and 96767 transitions. Word has length 25 [2021-03-10 21:19:51,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:51,331 INFO L480 AbstractCegarLoop]: Abstraction has 25043 states and 96767 transitions. [2021-03-10 21:19:51,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:51,331 INFO L276 IsEmpty]: Start isEmpty. Operand 25043 states and 96767 transitions. [2021-03-10 21:19:51,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:19:51,524 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:51,524 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:51,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-03-10 21:19:51,725 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:51,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:51,725 INFO L82 PathProgramCache]: Analyzing trace with hash -245349406, now seen corresponding path program 74 times [2021-03-10 21:19:51,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:51,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426541784] [2021-03-10 21:19:51,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:51,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426541784] [2021-03-10 21:19:51,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531785911] [2021-03-10 21:19:51,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:19:51,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:19:51,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:51,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:19:51,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:51,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:51,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:19:51,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359884823] [2021-03-10 21:19:51,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:19:52,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:52,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:19:52,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:19:52,000 INFO L87 Difference]: Start difference. First operand 25043 states and 96767 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:53,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:53,676 INFO L93 Difference]: Finished difference Result 28982 states and 108706 transitions. [2021-03-10 21:19:53,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:19:53,677 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:19:53,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:53,749 INFO L225 Difference]: With dead ends: 28982 [2021-03-10 21:19:53,750 INFO L226 Difference]: Without dead ends: 28947 [2021-03-10 21:19:53,750 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 941.6ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:19:53,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28947 states. [2021-03-10 21:19:54,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28947 to 25033. [2021-03-10 21:19:54,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25033 states, 25032 states have (on average 3.8635346756152127) internal successors, (96712), 25032 states have internal predecessors, (96712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:54,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25033 states to 25033 states and 96712 transitions. [2021-03-10 21:19:54,401 INFO L78 Accepts]: Start accepts. Automaton has 25033 states and 96712 transitions. Word has length 25 [2021-03-10 21:19:54,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:54,401 INFO L480 AbstractCegarLoop]: Abstraction has 25033 states and 96712 transitions. [2021-03-10 21:19:54,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:54,401 INFO L276 IsEmpty]: Start isEmpty. Operand 25033 states and 96712 transitions. [2021-03-10 21:19:54,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:19:54,451 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:54,451 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:54,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-03-10 21:19:54,652 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:54,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:54,652 INFO L82 PathProgramCache]: Analyzing trace with hash 540103142, now seen corresponding path program 75 times [2021-03-10 21:19:54,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:54,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677421226] [2021-03-10 21:19:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:54,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:54,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677421226] [2021-03-10 21:19:54,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918851614] [2021-03-10 21:19:54,708 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 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 [2021-03-10 21:19:54,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:19:54,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:54,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:19:54,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:54,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:54,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:19:54,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714338866] [2021-03-10 21:19:54,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:19:54,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:54,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:19:54,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:19:54,921 INFO L87 Difference]: Start difference. First operand 25033 states and 96712 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:57,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:19:57,422 INFO L93 Difference]: Finished difference Result 33306 states and 122305 transitions. [2021-03-10 21:19:57,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 21:19:57,424 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:19:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:19:57,502 INFO L225 Difference]: With dead ends: 33306 [2021-03-10 21:19:57,502 INFO L226 Difference]: Without dead ends: 33306 [2021-03-10 21:19:57,503 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 1437.3ms TimeCoverageRelationStatistics Valid=914, Invalid=2868, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 21:19:57,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33306 states. [2021-03-10 21:19:58,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33306 to 25063. [2021-03-10 21:19:58,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25063 states, 25062 states have (on average 3.864855159205171) internal successors, (96861), 25062 states have internal predecessors, (96861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:58,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25063 states to 25063 states and 96861 transitions. [2021-03-10 21:19:58,185 INFO L78 Accepts]: Start accepts. Automaton has 25063 states and 96861 transitions. Word has length 25 [2021-03-10 21:19:58,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:19:58,185 INFO L480 AbstractCegarLoop]: Abstraction has 25063 states and 96861 transitions. [2021-03-10 21:19:58,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:19:58,185 INFO L276 IsEmpty]: Start isEmpty. Operand 25063 states and 96861 transitions. [2021-03-10 21:19:58,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:19:58,227 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:19:58,227 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:19:58,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-03-10 21:19:58,443 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:19:58,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:19:58,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1576784866, now seen corresponding path program 76 times [2021-03-10 21:19:58,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:19:58,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161775771] [2021-03-10 21:19:58,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:19:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:19:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:58,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161775771] [2021-03-10 21:19:58,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016742087] [2021-03-10 21:19:58,502 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 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 [2021-03-10 21:19:58,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:19:58,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:19:58,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:19:58,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:19:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:19:58,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:19:58,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:19:58,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999054462] [2021-03-10 21:19:58,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:19:58,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:19:58,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:19:58,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:19:58,735 INFO L87 Difference]: Start difference. First operand 25063 states and 96861 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:01,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:01,201 INFO L93 Difference]: Finished difference Result 33343 states and 122559 transitions. [2021-03-10 21:20:01,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 21:20:01,203 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:20:01,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:01,284 INFO L225 Difference]: With dead ends: 33343 [2021-03-10 21:20:01,284 INFO L226 Difference]: Without dead ends: 33343 [2021-03-10 21:20:01,285 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 1312.8ms TimeCoverageRelationStatistics Valid=851, Invalid=2809, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 21:20:01,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33343 states. [2021-03-10 21:20:01,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33343 to 25038. [2021-03-10 21:20:01,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25038 states, 25037 states have (on average 3.8631625194711825) internal successors, (96722), 25037 states have internal predecessors, (96722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:01,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25038 states to 25038 states and 96722 transitions. [2021-03-10 21:20:01,938 INFO L78 Accepts]: Start accepts. Automaton has 25038 states and 96722 transitions. Word has length 25 [2021-03-10 21:20:01,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:01,938 INFO L480 AbstractCegarLoop]: Abstraction has 25038 states and 96722 transitions. [2021-03-10 21:20:01,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:01,939 INFO L276 IsEmpty]: Start isEmpty. Operand 25038 states and 96722 transitions. [2021-03-10 21:20:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:20:01,981 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:01,981 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:02,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-03-10 21:20:02,182 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:02,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:02,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1028006882, now seen corresponding path program 77 times [2021-03-10 21:20:02,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:02,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368899579] [2021-03-10 21:20:02,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:02,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368899579] [2021-03-10 21:20:02,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858254831] [2021-03-10 21:20:02,244 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 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 [2021-03-10 21:20:02,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:20:02,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:02,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:20:02,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:02,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:02,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:20:02,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659987498] [2021-03-10 21:20:02,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:20:02,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:02,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:20:02,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:20:02,477 INFO L87 Difference]: Start difference. First operand 25038 states and 96722 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:03,081 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 14 [2021-03-10 21:20:04,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:04,240 INFO L93 Difference]: Finished difference Result 29062 states and 108937 transitions. [2021-03-10 21:20:04,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:20:04,242 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:20:04,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:04,307 INFO L225 Difference]: With dead ends: 29062 [2021-03-10 21:20:04,308 INFO L226 Difference]: Without dead ends: 29027 [2021-03-10 21:20:04,308 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1135.7ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:20:04,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29027 states. [2021-03-10 21:20:04,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29027 to 25065. [2021-03-10 21:20:04,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25065 states, 25064 states have (on average 3.8628311522502394) internal successors, (96818), 25064 states have internal predecessors, (96818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25065 states to 25065 states and 96818 transitions. [2021-03-10 21:20:04,942 INFO L78 Accepts]: Start accepts. Automaton has 25065 states and 96818 transitions. Word has length 25 [2021-03-10 21:20:04,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:04,942 INFO L480 AbstractCegarLoop]: Abstraction has 25065 states and 96818 transitions. [2021-03-10 21:20:04,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:04,943 INFO L276 IsEmpty]: Start isEmpty. Operand 25065 states and 96818 transitions. [2021-03-10 21:20:04,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:20:04,987 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:04,987 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:05,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-03-10 21:20:05,188 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:05,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:05,188 INFO L82 PathProgramCache]: Analyzing trace with hash 2132601574, now seen corresponding path program 78 times [2021-03-10 21:20:05,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:05,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369561838] [2021-03-10 21:20:05,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:05,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:05,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369561838] [2021-03-10 21:20:05,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584114718] [2021-03-10 21:20:05,249 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 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 [2021-03-10 21:20:05,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:20:05,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:05,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:20:05,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:05,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:05,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:20:05,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310969913] [2021-03-10 21:20:05,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:20:05,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:05,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:20:05,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:20:05,555 INFO L87 Difference]: Start difference. First operand 25065 states and 96818 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-03-10 21:20:07,240 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-03-10 21:20:07,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:07,889 INFO L93 Difference]: Finished difference Result 29427 states and 110008 transitions. [2021-03-10 21:20:07,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 21:20:07,891 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-03-10 21:20:07,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:07,955 INFO L225 Difference]: With dead ends: 29427 [2021-03-10 21:20:07,955 INFO L226 Difference]: Without dead ends: 29427 [2021-03-10 21:20:07,955 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1570.3ms TimeCoverageRelationStatistics Valid=879, Invalid=2903, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 21:20:07,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29427 states. [2021-03-10 21:20:08,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29427 to 25026. [2021-03-10 21:20:08,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25026 states, 25025 states have (on average 3.863256743256743) internal successors, (96678), 25025 states have internal predecessors, (96678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25026 states to 25026 states and 96678 transitions. [2021-03-10 21:20:08,641 INFO L78 Accepts]: Start accepts. Automaton has 25026 states and 96678 transitions. Word has length 25 [2021-03-10 21:20:08,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:08,642 INFO L480 AbstractCegarLoop]: Abstraction has 25026 states and 96678 transitions. [2021-03-10 21:20:08,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-03-10 21:20:08,642 INFO L276 IsEmpty]: Start isEmpty. Operand 25026 states and 96678 transitions. [2021-03-10 21:20:08,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:20:08,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:08,692 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:08,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:08,893 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:08,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:08,893 INFO L82 PathProgramCache]: Analyzing trace with hash 2042881808, now seen corresponding path program 47 times [2021-03-10 21:20:08,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:08,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131029721] [2021-03-10 21:20:08,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:08,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131029721] [2021-03-10 21:20:08,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145228649] [2021-03-10 21:20:08,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:08,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:20:08,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:08,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:20:08,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:20:09,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:09,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-03-10 21:20:09,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643256394] [2021-03-10 21:20:09,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:20:09,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:09,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:20:09,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:20:09,101 INFO L87 Difference]: Start difference. First operand 25026 states and 96678 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:09,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:09,694 INFO L93 Difference]: Finished difference Result 35828 states and 129668 transitions. [2021-03-10 21:20:09,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:20:09,696 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:20:09,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:09,789 INFO L225 Difference]: With dead ends: 35828 [2021-03-10 21:20:09,789 INFO L226 Difference]: Without dead ends: 35821 [2021-03-10 21:20:09,789 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 310.9ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:20:09,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35821 states. [2021-03-10 21:20:10,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35821 to 24552. [2021-03-10 21:20:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24552 states, 24551 states have (on average 3.8637937354893896) internal successors, (94860), 24551 states have internal predecessors, (94860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24552 states to 24552 states and 94860 transitions. [2021-03-10 21:20:10,561 INFO L78 Accepts]: Start accepts. Automaton has 24552 states and 94860 transitions. Word has length 25 [2021-03-10 21:20:10,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:10,561 INFO L480 AbstractCegarLoop]: Abstraction has 24552 states and 94860 transitions. [2021-03-10 21:20:10,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:10,562 INFO L276 IsEmpty]: Start isEmpty. Operand 24552 states and 94860 transitions. [2021-03-10 21:20:10,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:20:10,603 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:10,603 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:10,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:10,807 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:10,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:10,807 INFO L82 PathProgramCache]: Analyzing trace with hash -630380332, now seen corresponding path program 48 times [2021-03-10 21:20:10,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:10,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305415865] [2021-03-10 21:20:10,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:10,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305415865] [2021-03-10 21:20:10,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890581147] [2021-03-10 21:20:10,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:10,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:20:10,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:10,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:20:10,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:20:11,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:11,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 21:20:11,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464184901] [2021-03-10 21:20:11,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:20:11,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:11,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:20:11,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:20:11,007 INFO L87 Difference]: Start difference. First operand 24552 states and 94860 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:11,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:11,754 INFO L93 Difference]: Finished difference Result 44652 states and 164681 transitions. [2021-03-10 21:20:11,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:20:11,756 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:20:11,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:11,884 INFO L225 Difference]: With dead ends: 44652 [2021-03-10 21:20:11,884 INFO L226 Difference]: Without dead ends: 44652 [2021-03-10 21:20:11,884 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:20:11,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44652 states. [2021-03-10 21:20:12,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44652 to 32844. [2021-03-10 21:20:12,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32844 states, 32843 states have (on average 3.910117833328259) internal successors, (128420), 32843 states have internal predecessors, (128420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:12,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32844 states to 32844 states and 128420 transitions. [2021-03-10 21:20:12,915 INFO L78 Accepts]: Start accepts. Automaton has 32844 states and 128420 transitions. Word has length 25 [2021-03-10 21:20:12,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:12,915 INFO L480 AbstractCegarLoop]: Abstraction has 32844 states and 128420 transitions. [2021-03-10 21:20:12,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:12,915 INFO L276 IsEmpty]: Start isEmpty. Operand 32844 states and 128420 transitions. [2021-03-10 21:20:12,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:20:12,976 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:12,977 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:13,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:13,177 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:13,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:13,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1477189716, now seen corresponding path program 49 times [2021-03-10 21:20:13,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:13,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624460246] [2021-03-10 21:20:13,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:13,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624460246] [2021-03-10 21:20:13,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668970209] [2021-03-10 21:20:13,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:13,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:20:13,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:13,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:13,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:20:13,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818068303] [2021-03-10 21:20:13,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:20:13,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:13,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:20:13,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:20:13,480 INFO L87 Difference]: Start difference. First operand 32844 states and 128420 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:14,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:14,793 INFO L93 Difference]: Finished difference Result 33629 states and 130552 transitions. [2021-03-10 21:20:14,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:20:14,795 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:20:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:14,872 INFO L225 Difference]: With dead ends: 33629 [2021-03-10 21:20:14,872 INFO L226 Difference]: Without dead ends: 33615 [2021-03-10 21:20:14,872 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 723.0ms TimeCoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:20:14,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33615 states. [2021-03-10 21:20:15,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33615 to 33084. [2021-03-10 21:20:15,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33084 states, 33083 states have (on average 3.9054499289665388) internal successors, (129204), 33083 states have internal predecessors, (129204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:15,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33084 states to 33084 states and 129204 transitions. [2021-03-10 21:20:15,712 INFO L78 Accepts]: Start accepts. Automaton has 33084 states and 129204 transitions. Word has length 25 [2021-03-10 21:20:15,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:15,713 INFO L480 AbstractCegarLoop]: Abstraction has 33084 states and 129204 transitions. [2021-03-10 21:20:15,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:15,713 INFO L276 IsEmpty]: Start isEmpty. Operand 33084 states and 129204 transitions. [2021-03-10 21:20:15,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:20:15,767 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:15,767 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:15,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:15,968 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:15,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:15,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1713182888, now seen corresponding path program 50 times [2021-03-10 21:20:15,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:15,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099525067] [2021-03-10 21:20:15,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:16,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099525067] [2021-03-10 21:20:16,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335262143] [2021-03-10 21:20:16,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:16,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:20:16,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:16,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:20:16,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:16,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:16,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:20:16,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732547732] [2021-03-10 21:20:16,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:20:16,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:16,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:20:16,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:20:16,273 INFO L87 Difference]: Start difference. First operand 33084 states and 129204 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-03-10 21:20:17,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:17,458 INFO L93 Difference]: Finished difference Result 33760 states and 130979 transitions. [2021-03-10 21:20:17,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:20:17,459 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-03-10 21:20:17,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:17,798 INFO L225 Difference]: With dead ends: 33760 [2021-03-10 21:20:17,799 INFO L226 Difference]: Without dead ends: 33754 [2021-03-10 21:20:17,799 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 843.4ms TimeCoverageRelationStatistics Valid=369, Invalid=1271, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:20:17,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33754 states. [2021-03-10 21:20:18,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33754 to 33087. [2021-03-10 21:20:18,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33087 states, 33086 states have (on average 3.9052469322372) internal successors, (129209), 33086 states have internal predecessors, (129209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33087 states to 33087 states and 129209 transitions. [2021-03-10 21:20:18,811 INFO L78 Accepts]: Start accepts. Automaton has 33087 states and 129209 transitions. Word has length 25 [2021-03-10 21:20:18,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:18,811 INFO L480 AbstractCegarLoop]: Abstraction has 33087 states and 129209 transitions. [2021-03-10 21:20:18,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-03-10 21:20:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 33087 states and 129209 transitions. [2021-03-10 21:20:18,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:20:18,883 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:18,883 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:19,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:19,084 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:19,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:19,084 INFO L82 PathProgramCache]: Analyzing trace with hash 889676572, now seen corresponding path program 51 times [2021-03-10 21:20:19,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:19,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698205305] [2021-03-10 21:20:19,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:20:19,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698205305] [2021-03-10 21:20:19,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526719242] [2021-03-10 21:20:19,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:19,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:20:19,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:19,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:20:19,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:20:19,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:19,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-03-10 21:20:19,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789264665] [2021-03-10 21:20:19,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:20:19,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:19,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:20:19,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:20:19,295 INFO L87 Difference]: Start difference. First operand 33087 states and 129209 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:19,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:19,718 INFO L93 Difference]: Finished difference Result 41266 states and 153993 transitions. [2021-03-10 21:20:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:20:19,720 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:20:19,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:19,818 INFO L225 Difference]: With dead ends: 41266 [2021-03-10 21:20:19,818 INFO L226 Difference]: Without dead ends: 41260 [2021-03-10 21:20:19,818 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:20:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41260 states. [2021-03-10 21:20:20,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41260 to 33073. [2021-03-10 21:20:20,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33073 states, 33072 states have (on average 3.904360183841316) internal successors, (129125), 33072 states have internal predecessors, (129125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33073 states to 33073 states and 129125 transitions. [2021-03-10 21:20:20,830 INFO L78 Accepts]: Start accepts. Automaton has 33073 states and 129125 transitions. Word has length 25 [2021-03-10 21:20:20,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:20,831 INFO L480 AbstractCegarLoop]: Abstraction has 33073 states and 129125 transitions. [2021-03-10 21:20:20,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:20,831 INFO L276 IsEmpty]: Start isEmpty. Operand 33073 states and 129125 transitions. [2021-03-10 21:20:20,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:20:20,896 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:20,896 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:21,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-03-10 21:20:21,096 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:21,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:21,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1922155786, now seen corresponding path program 52 times [2021-03-10 21:20:21,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:21,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416028764] [2021-03-10 21:20:21,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:20:21,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416028764] [2021-03-10 21:20:21,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489375390] [2021-03-10 21:20:21,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:21,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:20:21,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:21,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:20:21,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:20:21,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:21,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-03-10 21:20:21,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650693891] [2021-03-10 21:20:21,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:20:21,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:21,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:20:21,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:20:21,273 INFO L87 Difference]: Start difference. First operand 33073 states and 129125 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:21,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:21,947 INFO L93 Difference]: Finished difference Result 41324 states and 154127 transitions. [2021-03-10 21:20:21,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:20:21,949 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:20:21,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:22,063 INFO L225 Difference]: With dead ends: 41324 [2021-03-10 21:20:22,063 INFO L226 Difference]: Without dead ends: 41306 [2021-03-10 21:20:22,063 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:20:22,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41306 states. [2021-03-10 21:20:22,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41306 to 33052. [2021-03-10 21:20:22,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33052 states, 33051 states have (on average 3.903543009288675) internal successors, (129016), 33051 states have internal predecessors, (129016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:23,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33052 states to 33052 states and 129016 transitions. [2021-03-10 21:20:23,025 INFO L78 Accepts]: Start accepts. Automaton has 33052 states and 129016 transitions. Word has length 25 [2021-03-10 21:20:23,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:23,025 INFO L480 AbstractCegarLoop]: Abstraction has 33052 states and 129016 transitions. [2021-03-10 21:20:23,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:23,025 INFO L276 IsEmpty]: Start isEmpty. Operand 33052 states and 129016 transitions. [2021-03-10 21:20:23,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:20:23,087 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:23,087 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:23,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-03-10 21:20:23,288 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:23,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:23,288 INFO L82 PathProgramCache]: Analyzing trace with hash -376083974, now seen corresponding path program 53 times [2021-03-10 21:20:23,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:23,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164812887] [2021-03-10 21:20:23,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:23,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164812887] [2021-03-10 21:20:23,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491559046] [2021-03-10 21:20:23,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:23,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:20:23,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:23,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:20:23,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:23,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:23,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-03-10 21:20:23,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441840620] [2021-03-10 21:20:23,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:20:23,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:23,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:20:23,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:20:23,491 INFO L87 Difference]: Start difference. First operand 33052 states and 129016 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-03-10 21:20:24,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:24,024 INFO L93 Difference]: Finished difference Result 41161 states and 153593 transitions. [2021-03-10 21:20:24,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:20:24,025 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-03-10 21:20:24,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:24,143 INFO L225 Difference]: With dead ends: 41161 [2021-03-10 21:20:24,143 INFO L226 Difference]: Without dead ends: 41131 [2021-03-10 21:20:24,144 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:20:24,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41131 states. [2021-03-10 21:20:25,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41131 to 33160. [2021-03-10 21:20:25,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33160 states, 33159 states have (on average 3.900660454175337) internal successors, (129342), 33159 states have internal predecessors, (129342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:25,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33160 states to 33160 states and 129342 transitions. [2021-03-10 21:20:25,241 INFO L78 Accepts]: Start accepts. Automaton has 33160 states and 129342 transitions. Word has length 25 [2021-03-10 21:20:25,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:25,241 INFO L480 AbstractCegarLoop]: Abstraction has 33160 states and 129342 transitions. [2021-03-10 21:20:25,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-03-10 21:20:25,241 INFO L276 IsEmpty]: Start isEmpty. Operand 33160 states and 129342 transitions. [2021-03-10 21:20:25,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:20:25,300 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:25,300 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:25,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-03-10 21:20:25,501 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:25,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:25,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1609809744, now seen corresponding path program 79 times [2021-03-10 21:20:25,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:25,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676891296] [2021-03-10 21:20:25,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:25,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676891296] [2021-03-10 21:20:25,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350610821] [2021-03-10 21:20:25,556 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 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 [2021-03-10 21:20:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:25,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:20:25,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:25,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:25,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:20:25,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902609266] [2021-03-10 21:20:25,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:20:25,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:25,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:20:25,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:20:25,761 INFO L87 Difference]: Start difference. First operand 33160 states and 129342 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:29,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:29,124 INFO L93 Difference]: Finished difference Result 66239 states and 248356 transitions. [2021-03-10 21:20:29,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-03-10 21:20:29,126 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:20:29,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:29,326 INFO L225 Difference]: With dead ends: 66239 [2021-03-10 21:20:29,326 INFO L226 Difference]: Without dead ends: 66187 [2021-03-10 21:20:29,327 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 2115.1ms TimeCoverageRelationStatistics Valid=1425, Invalid=5055, Unknown=0, NotChecked=0, Total=6480 [2021-03-10 21:20:29,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66187 states. [2021-03-10 21:20:30,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66187 to 38023. [2021-03-10 21:20:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38023 states, 38022 states have (on average 3.936904949765925) internal successors, (149689), 38022 states have internal predecessors, (149689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:30,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38023 states to 38023 states and 149689 transitions. [2021-03-10 21:20:30,605 INFO L78 Accepts]: Start accepts. Automaton has 38023 states and 149689 transitions. Word has length 25 [2021-03-10 21:20:30,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:30,605 INFO L480 AbstractCegarLoop]: Abstraction has 38023 states and 149689 transitions. [2021-03-10 21:20:30,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:30,605 INFO L276 IsEmpty]: Start isEmpty. Operand 38023 states and 149689 transitions. [2021-03-10 21:20:30,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:20:30,678 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:30,678 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:30,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-03-10 21:20:30,879 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:30,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:30,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1706600108, now seen corresponding path program 80 times [2021-03-10 21:20:30,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:30,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522434221] [2021-03-10 21:20:30,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:30,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:30,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522434221] [2021-03-10 21:20:30,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683465593] [2021-03-10 21:20:30,937 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 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 [2021-03-10 21:20:30,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:20:30,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:30,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:20:30,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:31,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:31,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:20:31,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785044170] [2021-03-10 21:20:31,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:20:31,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:31,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:20:31,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:20:31,152 INFO L87 Difference]: Start difference. First operand 38023 states and 149689 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:20:33,175 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2021-03-10 21:20:34,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:34,262 INFO L93 Difference]: Finished difference Result 74432 states and 275104 transitions. [2021-03-10 21:20:34,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-10 21:20:34,263 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-03-10 21:20:34,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:34,467 INFO L225 Difference]: With dead ends: 74432 [2021-03-10 21:20:34,467 INFO L226 Difference]: Without dead ends: 74390 [2021-03-10 21:20:34,468 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 2013.3ms TimeCoverageRelationStatistics Valid=1103, Invalid=3727, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 21:20:34,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74390 states. [2021-03-10 21:20:35,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74390 to 35919. [2021-03-10 21:20:35,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35919 states, 35918 states have (on average 3.9112422740687123) internal successors, (140484), 35918 states have internal predecessors, (140484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:36,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35919 states to 35919 states and 140484 transitions. [2021-03-10 21:20:36,127 INFO L78 Accepts]: Start accepts. Automaton has 35919 states and 140484 transitions. Word has length 25 [2021-03-10 21:20:36,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:36,127 INFO L480 AbstractCegarLoop]: Abstraction has 35919 states and 140484 transitions. [2021-03-10 21:20:36,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:20:36,127 INFO L276 IsEmpty]: Start isEmpty. Operand 35919 states and 140484 transitions. [2021-03-10 21:20:36,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:20:36,216 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:36,216 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:36,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:36,417 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:36,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:36,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1176199720, now seen corresponding path program 81 times [2021-03-10 21:20:36,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:36,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360051288] [2021-03-10 21:20:36,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:36,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360051288] [2021-03-10 21:20:36,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675851186] [2021-03-10 21:20:36,474 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 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 [2021-03-10 21:20:36,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:20:36,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:36,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:20:36,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:36,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:36,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:20:36,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734677809] [2021-03-10 21:20:36,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:20:36,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:36,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:20:36,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:20:36,686 INFO L87 Difference]: Start difference. First operand 35919 states and 140484 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:20:39,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:39,085 INFO L93 Difference]: Finished difference Result 61858 states and 228818 transitions. [2021-03-10 21:20:39,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 21:20:39,087 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-03-10 21:20:39,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:39,540 INFO L225 Difference]: With dead ends: 61858 [2021-03-10 21:20:39,540 INFO L226 Difference]: Without dead ends: 61830 [2021-03-10 21:20:39,540 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1466.4ms TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 21:20:39,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61830 states. [2021-03-10 21:20:40,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61830 to 38738. [2021-03-10 21:20:40,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38738 states, 38737 states have (on average 3.9098794434261817) internal successors, (151457), 38737 states have internal predecessors, (151457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:40,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38738 states to 38738 states and 151457 transitions. [2021-03-10 21:20:40,888 INFO L78 Accepts]: Start accepts. Automaton has 38738 states and 151457 transitions. Word has length 25 [2021-03-10 21:20:40,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:40,888 INFO L480 AbstractCegarLoop]: Abstraction has 38738 states and 151457 transitions. [2021-03-10 21:20:40,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:20:40,888 INFO L276 IsEmpty]: Start isEmpty. Operand 38738 states and 151457 transitions. [2021-03-10 21:20:40,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:20:40,953 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:40,953 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:41,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:41,154 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:41,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:41,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1107955728, now seen corresponding path program 82 times [2021-03-10 21:20:41,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:41,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368736248] [2021-03-10 21:20:41,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:41,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368736248] [2021-03-10 21:20:41,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60236301] [2021-03-10 21:20:41,227 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:20:41,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:20:41,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:41,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:20:41,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:41,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:41,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:20:41,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957349543] [2021-03-10 21:20:41,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:20:41,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:41,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:20:41,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:20:41,444 INFO L87 Difference]: Start difference. First operand 38738 states and 151457 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:20:44,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:44,316 INFO L93 Difference]: Finished difference Result 77268 states and 287634 transitions. [2021-03-10 21:20:44,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-10 21:20:44,318 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-03-10 21:20:44,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:44,559 INFO L225 Difference]: With dead ends: 77268 [2021-03-10 21:20:44,560 INFO L226 Difference]: Without dead ends: 77240 [2021-03-10 21:20:44,560 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1658.1ms TimeCoverageRelationStatistics Valid=961, Invalid=3199, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 21:20:44,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77240 states. [2021-03-10 21:20:45,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77240 to 45925. [2021-03-10 21:20:45,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45925 states, 45924 states have (on average 3.9262477136137965) internal successors, (180309), 45924 states have internal predecessors, (180309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:46,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45925 states to 45925 states and 180309 transitions. [2021-03-10 21:20:46,113 INFO L78 Accepts]: Start accepts. Automaton has 45925 states and 180309 transitions. Word has length 25 [2021-03-10 21:20:46,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:46,113 INFO L480 AbstractCegarLoop]: Abstraction has 45925 states and 180309 transitions. [2021-03-10 21:20:46,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:20:46,113 INFO L276 IsEmpty]: Start isEmpty. Operand 45925 states and 180309 transitions. [2021-03-10 21:20:46,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:20:46,200 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:46,200 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:46,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-03-10 21:20:46,401 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:46,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:46,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1067069608, now seen corresponding path program 83 times [2021-03-10 21:20:46,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:46,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491095226] [2021-03-10 21:20:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:46,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491095226] [2021-03-10 21:20:46,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074836754] [2021-03-10 21:20:46,455 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 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 [2021-03-10 21:20:46,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:20:46,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:46,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:20:46,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:46,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:46,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:20:46,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503075490] [2021-03-10 21:20:46,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:20:46,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:46,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:20:46,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:20:46,950 INFO L87 Difference]: Start difference. First operand 45925 states and 180309 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:49,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:49,301 INFO L93 Difference]: Finished difference Result 66048 states and 249082 transitions. [2021-03-10 21:20:49,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 21:20:49,303 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:20:49,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:49,512 INFO L225 Difference]: With dead ends: 66048 [2021-03-10 21:20:49,512 INFO L226 Difference]: Without dead ends: 65996 [2021-03-10 21:20:49,513 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 1393.7ms TimeCoverageRelationStatistics Valid=733, Invalid=2689, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 21:20:49,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65996 states. [2021-03-10 21:20:50,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65996 to 40933. [2021-03-10 21:20:50,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40933 states, 40932 states have (on average 3.9125378676829863) internal successors, (160148), 40932 states have internal predecessors, (160148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40933 states to 40933 states and 160148 transitions. [2021-03-10 21:20:51,081 INFO L78 Accepts]: Start accepts. Automaton has 40933 states and 160148 transitions. Word has length 25 [2021-03-10 21:20:51,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:51,081 INFO L480 AbstractCegarLoop]: Abstraction has 40933 states and 160148 transitions. [2021-03-10 21:20:51,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:51,081 INFO L276 IsEmpty]: Start isEmpty. Operand 40933 states and 160148 transitions. [2021-03-10 21:20:51,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:20:51,150 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:51,150 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:51,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:51,351 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:51,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:51,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1363443692, now seen corresponding path program 84 times [2021-03-10 21:20:51,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:51,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295883713] [2021-03-10 21:20:51,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:51,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295883713] [2021-03-10 21:20:51,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399851115] [2021-03-10 21:20:51,421 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 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 [2021-03-10 21:20:51,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:20:51,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:20:51,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:20:51,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:51,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:51,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:20:51,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701952653] [2021-03-10 21:20:51,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:20:51,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:51,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:20:51,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:20:51,634 INFO L87 Difference]: Start difference. First operand 40933 states and 160148 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:54,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:54,112 INFO L93 Difference]: Finished difference Result 67539 states and 253876 transitions. [2021-03-10 21:20:54,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-10 21:20:54,112 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:20:54,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:54,327 INFO L225 Difference]: With dead ends: 67539 [2021-03-10 21:20:54,327 INFO L226 Difference]: Without dead ends: 67515 [2021-03-10 21:20:54,328 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1465.7ms TimeCoverageRelationStatistics Valid=844, Invalid=2816, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 21:20:54,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67515 states. [2021-03-10 21:20:55,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67515 to 42889. [2021-03-10 21:20:55,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42889 states, 42888 states have (on average 3.9317524715538146) internal successors, (168625), 42888 states have internal predecessors, (168625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:55,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42889 states to 42889 states and 168625 transitions. [2021-03-10 21:20:55,584 INFO L78 Accepts]: Start accepts. Automaton has 42889 states and 168625 transitions. Word has length 25 [2021-03-10 21:20:55,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:20:55,584 INFO L480 AbstractCegarLoop]: Abstraction has 42889 states and 168625 transitions. [2021-03-10 21:20:55,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:20:55,584 INFO L276 IsEmpty]: Start isEmpty. Operand 42889 states and 168625 transitions. [2021-03-10 21:20:55,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:20:55,661 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:20:55,661 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:20:55,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:20:55,863 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:20:55,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:20:55,864 INFO L82 PathProgramCache]: Analyzing trace with hash -384886248, now seen corresponding path program 85 times [2021-03-10 21:20:55,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:20:55,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034388173] [2021-03-10 21:20:55,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:20:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:55,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034388173] [2021-03-10 21:20:55,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097165722] [2021-03-10 21:20:55,931 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 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 [2021-03-10 21:20:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:20:55,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:20:55,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:20:56,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:20:56,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:20:56,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:20:56,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695031775] [2021-03-10 21:20:56,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:20:56,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:20:56,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:20:56,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:20:56,145 INFO L87 Difference]: Start difference. First operand 42889 states and 168625 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:20:58,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:20:58,449 INFO L93 Difference]: Finished difference Result 73498 states and 274895 transitions. [2021-03-10 21:20:58,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 21:20:58,450 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-03-10 21:20:58,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:20:58,654 INFO L225 Difference]: With dead ends: 73498 [2021-03-10 21:20:58,654 INFO L226 Difference]: Without dead ends: 73498 [2021-03-10 21:20:58,655 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1163.8ms TimeCoverageRelationStatistics Valid=619, Invalid=1931, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:20:58,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73498 states. [2021-03-10 21:20:59,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73498 to 42843. [2021-03-10 21:20:59,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42843 states, 42842 states have (on average 3.928574763082956) internal successors, (168308), 42842 states have internal predecessors, (168308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:00,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42843 states to 42843 states and 168308 transitions. [2021-03-10 21:21:00,027 INFO L78 Accepts]: Start accepts. Automaton has 42843 states and 168308 transitions. Word has length 25 [2021-03-10 21:21:00,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:00,027 INFO L480 AbstractCegarLoop]: Abstraction has 42843 states and 168308 transitions. [2021-03-10 21:21:00,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:21:00,027 INFO L276 IsEmpty]: Start isEmpty. Operand 42843 states and 168308 transitions. [2021-03-10 21:21:00,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:21:00,100 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:00,100 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:00,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:00,303 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:00,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:00,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1231072, now seen corresponding path program 54 times [2021-03-10 21:21:00,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:00,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749353977] [2021-03-10 21:21:00,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:00,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749353977] [2021-03-10 21:21:00,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138640531] [2021-03-10 21:21:00,381 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 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 [2021-03-10 21:21:00,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:21:00,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:00,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:21:00,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:00,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:00,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:21:00,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110515416] [2021-03-10 21:21:00,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:21:00,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:00,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:21:00,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:21:00,617 INFO L87 Difference]: Start difference. First operand 42843 states and 168308 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:02,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:02,233 INFO L93 Difference]: Finished difference Result 48257 states and 184838 transitions. [2021-03-10 21:21:02,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:21:02,235 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:21:02,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:02,348 INFO L225 Difference]: With dead ends: 48257 [2021-03-10 21:21:02,349 INFO L226 Difference]: Without dead ends: 48257 [2021-03-10 21:21:02,349 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 701.2ms TimeCoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:21:02,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48257 states. [2021-03-10 21:21:03,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48257 to 42793. [2021-03-10 21:21:03,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42793 states, 42792 states have (on average 3.928608151056272) internal successors, (168113), 42792 states have internal predecessors, (168113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:03,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42793 states to 42793 states and 168113 transitions. [2021-03-10 21:21:03,565 INFO L78 Accepts]: Start accepts. Automaton has 42793 states and 168113 transitions. Word has length 25 [2021-03-10 21:21:03,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:03,565 INFO L480 AbstractCegarLoop]: Abstraction has 42793 states and 168113 transitions. [2021-03-10 21:21:03,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:03,566 INFO L276 IsEmpty]: Start isEmpty. Operand 42793 states and 168113 transitions. [2021-03-10 21:21:03,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:21:03,672 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:03,672 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:03,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-03-10 21:21:03,895 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:03,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:03,895 INFO L82 PathProgramCache]: Analyzing trace with hash -772027368, now seen corresponding path program 55 times [2021-03-10 21:21:03,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:03,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267368018] [2021-03-10 21:21:03,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:04,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267368018] [2021-03-10 21:21:04,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667843895] [2021-03-10 21:21:04,000 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 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 [2021-03-10 21:21:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:04,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:21:04,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:04,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:04,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:21:04,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849015450] [2021-03-10 21:21:04,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:21:04,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:04,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:21:04,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:21:04,253 INFO L87 Difference]: Start difference. First operand 42793 states and 168113 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:05,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:05,547 INFO L93 Difference]: Finished difference Result 44296 states and 172371 transitions. [2021-03-10 21:21:05,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:21:05,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:21:05,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:05,664 INFO L225 Difference]: With dead ends: 44296 [2021-03-10 21:21:05,664 INFO L226 Difference]: Without dead ends: 44282 [2021-03-10 21:21:05,664 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 729.9ms TimeCoverageRelationStatistics Valid=337, Invalid=1303, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:21:05,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44282 states. [2021-03-10 21:21:06,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44282 to 43170. [2021-03-10 21:21:06,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43170 states, 43169 states have (on average 3.922814982973893) internal successors, (169344), 43169 states have internal predecessors, (169344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:06,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43170 states to 43170 states and 169344 transitions. [2021-03-10 21:21:06,765 INFO L78 Accepts]: Start accepts. Automaton has 43170 states and 169344 transitions. Word has length 25 [2021-03-10 21:21:06,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:06,765 INFO L480 AbstractCegarLoop]: Abstraction has 43170 states and 169344 transitions. [2021-03-10 21:21:06,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:06,765 INFO L276 IsEmpty]: Start isEmpty. Operand 43170 states and 169344 transitions. [2021-03-10 21:21:06,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:21:06,839 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:06,839 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:07,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-03-10 21:21:07,040 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:07,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:07,040 INFO L82 PathProgramCache]: Analyzing trace with hash 332567324, now seen corresponding path program 56 times [2021-03-10 21:21:07,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:07,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147464083] [2021-03-10 21:21:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:07,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147464083] [2021-03-10 21:21:07,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761977640] [2021-03-10 21:21:07,110 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 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 [2021-03-10 21:21:07,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:21:07,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:07,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:21:07,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:07,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:07,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:21:07,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554863893] [2021-03-10 21:21:07,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:21:07,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:07,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:21:07,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:21:07,358 INFO L87 Difference]: Start difference. First operand 43170 states and 169344 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-03-10 21:21:09,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:09,093 INFO L93 Difference]: Finished difference Result 44660 states and 173461 transitions. [2021-03-10 21:21:09,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 21:21:09,095 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-03-10 21:21:09,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:09,204 INFO L225 Difference]: With dead ends: 44660 [2021-03-10 21:21:09,205 INFO L226 Difference]: Without dead ends: 44654 [2021-03-10 21:21:09,205 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 866.3ms TimeCoverageRelationStatistics Valid=472, Invalid=1784, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:21:09,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44654 states. [2021-03-10 21:21:10,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44654 to 42990. [2021-03-10 21:21:10,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42990 states, 42989 states have (on average 3.9254925678661983) internal successors, (168753), 42989 states have internal predecessors, (168753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:10,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42990 states to 42990 states and 168753 transitions. [2021-03-10 21:21:10,215 INFO L78 Accepts]: Start accepts. Automaton has 42990 states and 168753 transitions. Word has length 25 [2021-03-10 21:21:10,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:10,215 INFO L480 AbstractCegarLoop]: Abstraction has 42990 states and 168753 transitions. [2021-03-10 21:21:10,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-03-10 21:21:10,215 INFO L276 IsEmpty]: Start isEmpty. Operand 42990 states and 168753 transitions. [2021-03-10 21:21:10,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:21:10,293 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:10,293 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:10,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-03-10 21:21:10,493 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:10,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:10,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1637832284, now seen corresponding path program 86 times [2021-03-10 21:21:10,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:10,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699490966] [2021-03-10 21:21:10,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:10,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699490966] [2021-03-10 21:21:10,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908201179] [2021-03-10 21:21:10,575 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 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 [2021-03-10 21:21:10,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:21:10,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:10,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:21:10,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:10,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:10,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:21:10,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171955555] [2021-03-10 21:21:10,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:21:10,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:10,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:21:10,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:21:10,863 INFO L87 Difference]: Start difference. First operand 42990 states and 168753 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:13,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:13,453 INFO L93 Difference]: Finished difference Result 60797 states and 230049 transitions. [2021-03-10 21:21:13,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 21:21:13,454 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:21:13,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:13,619 INFO L225 Difference]: With dead ends: 60797 [2021-03-10 21:21:13,620 INFO L226 Difference]: Without dead ends: 60773 [2021-03-10 21:21:13,620 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1675.8ms TimeCoverageRelationStatistics Valid=674, Invalid=2296, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 21:21:13,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60773 states. [2021-03-10 21:21:14,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60773 to 43024. [2021-03-10 21:21:14,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43024 states, 43023 states have (on average 3.925342258791809) internal successors, (168880), 43023 states have internal predecessors, (168880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:14,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43024 states to 43024 states and 168880 transitions. [2021-03-10 21:21:14,853 INFO L78 Accepts]: Start accepts. Automaton has 43024 states and 168880 transitions. Word has length 25 [2021-03-10 21:21:14,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:14,853 INFO L480 AbstractCegarLoop]: Abstraction has 43024 states and 168880 transitions. [2021-03-10 21:21:14,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:14,853 INFO L276 IsEmpty]: Start isEmpty. Operand 43024 states and 168880 transitions. [2021-03-10 21:21:14,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:21:14,922 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:14,922 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:15,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-03-10 21:21:15,122 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:15,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:15,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1355957028, now seen corresponding path program 87 times [2021-03-10 21:21:15,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:15,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108433897] [2021-03-10 21:21:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:15,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108433897] [2021-03-10 21:21:15,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391267307] [2021-03-10 21:21:15,207 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 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 [2021-03-10 21:21:15,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:21:15,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:15,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:21:15,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:15,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:15,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:21:15,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721308106] [2021-03-10 21:21:15,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:21:15,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:15,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:21:15,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:21:15,427 INFO L87 Difference]: Start difference. First operand 43024 states and 168880 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:17,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:17,394 INFO L93 Difference]: Finished difference Result 59275 states and 225591 transitions. [2021-03-10 21:21:17,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 21:21:17,395 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:21:17,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:17,547 INFO L225 Difference]: With dead ends: 59275 [2021-03-10 21:21:17,547 INFO L226 Difference]: Without dead ends: 59251 [2021-03-10 21:21:17,547 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1034.3ms TimeCoverageRelationStatistics Valid=464, Invalid=1516, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:21:17,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59251 states. [2021-03-10 21:21:18,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59251 to 42990. [2021-03-10 21:21:18,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42990 states, 42989 states have (on average 3.925469306101561) internal successors, (168752), 42989 states have internal predecessors, (168752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:18,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42990 states to 42990 states and 168752 transitions. [2021-03-10 21:21:18,722 INFO L78 Accepts]: Start accepts. Automaton has 42990 states and 168752 transitions. Word has length 25 [2021-03-10 21:21:18,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:18,722 INFO L480 AbstractCegarLoop]: Abstraction has 42990 states and 168752 transitions. [2021-03-10 21:21:18,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:18,722 INFO L276 IsEmpty]: Start isEmpty. Operand 42990 states and 168752 transitions. [2021-03-10 21:21:18,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:21:18,793 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:18,793 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:18,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-03-10 21:21:18,994 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:18,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:18,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1354335008, now seen corresponding path program 88 times [2021-03-10 21:21:18,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:18,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738536842] [2021-03-10 21:21:18,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:19,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738536842] [2021-03-10 21:21:19,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115828660] [2021-03-10 21:21:19,059 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 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 [2021-03-10 21:21:19,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:21:19,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:19,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:21:19,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:19,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:19,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:21:19,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872969255] [2021-03-10 21:21:19,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:21:19,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:19,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:21:19,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:21:19,287 INFO L87 Difference]: Start difference. First operand 42990 states and 168752 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:21:21,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:21,470 INFO L93 Difference]: Finished difference Result 75858 states and 282972 transitions. [2021-03-10 21:21:21,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 21:21:21,470 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-03-10 21:21:21,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:21,671 INFO L225 Difference]: With dead ends: 75858 [2021-03-10 21:21:21,671 INFO L226 Difference]: Without dead ends: 75858 [2021-03-10 21:21:21,671 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1435.7ms TimeCoverageRelationStatistics Valid=598, Invalid=1852, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 21:21:21,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75858 states. [2021-03-10 21:21:22,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75858 to 43007. [2021-03-10 21:21:22,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43007 states, 43006 states have (on average 3.9260103241408175) internal successors, (168842), 43006 states have internal predecessors, (168842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:23,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43007 states to 43007 states and 168842 transitions. [2021-03-10 21:21:23,046 INFO L78 Accepts]: Start accepts. Automaton has 43007 states and 168842 transitions. Word has length 25 [2021-03-10 21:21:23,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:23,047 INFO L480 AbstractCegarLoop]: Abstraction has 43007 states and 168842 transitions. [2021-03-10 21:21:23,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:21:23,047 INFO L276 IsEmpty]: Start isEmpty. Operand 43007 states and 168842 transitions. [2021-03-10 21:21:23,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:21:23,116 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:23,116 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:23,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-03-10 21:21:23,316 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:23,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:23,317 INFO L82 PathProgramCache]: Analyzing trace with hash 820690328, now seen corresponding path program 89 times [2021-03-10 21:21:23,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:23,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283394806] [2021-03-10 21:21:23,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:23,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:23,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283394806] [2021-03-10 21:21:23,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393477814] [2021-03-10 21:21:23,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:23,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:21:23,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:23,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:21:23,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:23,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:23,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:21:23,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57129248] [2021-03-10 21:21:23,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:21:23,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:23,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:21:23,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:21:23,604 INFO L87 Difference]: Start difference. First operand 43007 states and 168842 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:24,479 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-03-10 21:21:25,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:25,772 INFO L93 Difference]: Finished difference Result 70213 states and 263905 transitions. [2021-03-10 21:21:25,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 21:21:25,773 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:21:25,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:25,958 INFO L225 Difference]: With dead ends: 70213 [2021-03-10 21:21:25,958 INFO L226 Difference]: Without dead ends: 70191 [2021-03-10 21:21:25,958 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1441.7ms TimeCoverageRelationStatistics Valid=596, Invalid=1954, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:21:26,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70191 states. [2021-03-10 21:21:27,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70191 to 42956. [2021-03-10 21:21:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42956 states, 42955 states have (on average 3.924967989756722) internal successors, (168597), 42955 states have internal predecessors, (168597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42956 states to 42956 states and 168597 transitions. [2021-03-10 21:21:27,253 INFO L78 Accepts]: Start accepts. Automaton has 42956 states and 168597 transitions. Word has length 25 [2021-03-10 21:21:27,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:27,253 INFO L480 AbstractCegarLoop]: Abstraction has 42956 states and 168597 transitions. [2021-03-10 21:21:27,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:27,253 INFO L276 IsEmpty]: Start isEmpty. Operand 42956 states and 168597 transitions. [2021-03-10 21:21:27,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:21:27,322 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:27,323 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:27,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:27,523 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:27,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:27,523 INFO L82 PathProgramCache]: Analyzing trace with hash -121458378, now seen corresponding path program 90 times [2021-03-10 21:21:27,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:27,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907912348] [2021-03-10 21:21:27,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:27,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907912348] [2021-03-10 21:21:27,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170096493] [2021-03-10 21:21:27,598 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 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 [2021-03-10 21:21:27,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:21:27,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:27,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:21:27,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:27,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:27,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:21:27,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150655801] [2021-03-10 21:21:27,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:21:27,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:27,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:21:27,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:21:27,839 INFO L87 Difference]: Start difference. First operand 42956 states and 168597 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:29,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:29,490 INFO L93 Difference]: Finished difference Result 56698 states and 216274 transitions. [2021-03-10 21:21:29,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:21:29,492 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:21:29,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:29,642 INFO L225 Difference]: With dead ends: 56698 [2021-03-10 21:21:29,642 INFO L226 Difference]: Without dead ends: 56674 [2021-03-10 21:21:29,642 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 891.2ms TimeCoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:21:29,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56674 states. [2021-03-10 21:21:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56674 to 42976. [2021-03-10 21:21:30,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42976 states, 42975 states have (on average 3.9249098312972657) internal successors, (168673), 42975 states have internal predecessors, (168673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42976 states to 42976 states and 168673 transitions. [2021-03-10 21:21:30,774 INFO L78 Accepts]: Start accepts. Automaton has 42976 states and 168673 transitions. Word has length 25 [2021-03-10 21:21:30,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:30,774 INFO L480 AbstractCegarLoop]: Abstraction has 42976 states and 168673 transitions. [2021-03-10 21:21:30,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:30,774 INFO L276 IsEmpty]: Start isEmpty. Operand 42976 states and 168673 transitions. [2021-03-10 21:21:30,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:21:30,845 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:30,845 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:31,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:31,046 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:31,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:31,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1179719606, now seen corresponding path program 91 times [2021-03-10 21:21:31,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:31,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538243226] [2021-03-10 21:21:31,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:31,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538243226] [2021-03-10 21:21:31,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216499842] [2021-03-10 21:21:31,115 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 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 [2021-03-10 21:21:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:31,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:21:31,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:31,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:31,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:21:31,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110212056] [2021-03-10 21:21:31,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:21:31,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:31,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:21:31,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:21:31,359 INFO L87 Difference]: Start difference. First operand 42976 states and 168673 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:32,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:32,769 INFO L93 Difference]: Finished difference Result 55282 states and 212006 transitions. [2021-03-10 21:21:32,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:21:32,770 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:21:32,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:32,914 INFO L225 Difference]: With dead ends: 55282 [2021-03-10 21:21:32,915 INFO L226 Difference]: Without dead ends: 55258 [2021-03-10 21:21:32,915 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 694.2ms TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:21:32,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55258 states. [2021-03-10 21:21:33,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55258 to 42948. [2021-03-10 21:21:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42948 states, 42947 states have (on average 3.9250937201667173) internal successors, (168571), 42947 states have internal predecessors, (168571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:34,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42948 states to 42948 states and 168571 transitions. [2021-03-10 21:21:34,054 INFO L78 Accepts]: Start accepts. Automaton has 42948 states and 168571 transitions. Word has length 25 [2021-03-10 21:21:34,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:34,054 INFO L480 AbstractCegarLoop]: Abstraction has 42948 states and 168571 transitions. [2021-03-10 21:21:34,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:34,054 INFO L276 IsEmpty]: Start isEmpty. Operand 42948 states and 168571 transitions. [2021-03-10 21:21:34,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:21:34,129 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:34,129 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:34,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:34,330 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:34,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:34,330 INFO L82 PathProgramCache]: Analyzing trace with hash -366696404, now seen corresponding path program 92 times [2021-03-10 21:21:34,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:34,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339044210] [2021-03-10 21:21:34,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:34,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339044210] [2021-03-10 21:21:34,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603673242] [2021-03-10 21:21:34,406 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 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 [2021-03-10 21:21:34,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:21:34,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:34,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:21:34,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:34,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:34,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:21:34,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212861910] [2021-03-10 21:21:34,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:21:34,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:34,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:21:34,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:21:34,649 INFO L87 Difference]: Start difference. First operand 42948 states and 168571 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:35,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:35,765 INFO L93 Difference]: Finished difference Result 55613 states and 213184 transitions. [2021-03-10 21:21:35,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:21:35,767 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:21:35,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:35,910 INFO L225 Difference]: With dead ends: 55613 [2021-03-10 21:21:35,910 INFO L226 Difference]: Without dead ends: 55585 [2021-03-10 21:21:35,910 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 720.7ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:21:35,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55585 states. [2021-03-10 21:21:36,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55585 to 42946. [2021-03-10 21:21:37,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42946 states, 42945 states have (on average 3.9251833740831295) internal successors, (168567), 42945 states have internal predecessors, (168567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:37,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42946 states to 42946 states and 168567 transitions. [2021-03-10 21:21:37,165 INFO L78 Accepts]: Start accepts. Automaton has 42946 states and 168567 transitions. Word has length 25 [2021-03-10 21:21:37,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:37,165 INFO L480 AbstractCegarLoop]: Abstraction has 42946 states and 168567 transitions. [2021-03-10 21:21:37,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:37,165 INFO L276 IsEmpty]: Start isEmpty. Operand 42946 states and 168567 transitions. [2021-03-10 21:21:37,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:21:37,236 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:37,236 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:37,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:37,436 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:37,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:37,436 INFO L82 PathProgramCache]: Analyzing trace with hash -2130720980, now seen corresponding path program 93 times [2021-03-10 21:21:37,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:37,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531171003] [2021-03-10 21:21:37,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:37,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531171003] [2021-03-10 21:21:37,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961834661] [2021-03-10 21:21:37,520 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 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 [2021-03-10 21:21:37,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:21:37,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:37,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:21:37,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:38,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:38,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:21:38,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268540051] [2021-03-10 21:21:38,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:21:38,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:38,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:21:38,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:21:38,046 INFO L87 Difference]: Start difference. First operand 42946 states and 168567 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:21:40,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:40,363 INFO L93 Difference]: Finished difference Result 74999 states and 282718 transitions. [2021-03-10 21:21:40,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 21:21:40,365 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-03-10 21:21:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:40,579 INFO L225 Difference]: With dead ends: 74999 [2021-03-10 21:21:40,579 INFO L226 Difference]: Without dead ends: 74999 [2021-03-10 21:21:40,579 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1527.4ms TimeCoverageRelationStatistics Valid=599, Invalid=2157, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 21:21:40,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74999 states. [2021-03-10 21:21:41,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74999 to 42943. [2021-03-10 21:21:41,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42943 states, 42942 states have (on average 3.9248521261236085) internal successors, (168541), 42942 states have internal predecessors, (168541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42943 states to 42943 states and 168541 transitions. [2021-03-10 21:21:42,201 INFO L78 Accepts]: Start accepts. Automaton has 42943 states and 168541 transitions. Word has length 25 [2021-03-10 21:21:42,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:42,201 INFO L480 AbstractCegarLoop]: Abstraction has 42943 states and 168541 transitions. [2021-03-10 21:21:42,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:21:42,201 INFO L276 IsEmpty]: Start isEmpty. Operand 42943 states and 168541 transitions. [2021-03-10 21:21:42,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:21:42,274 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:42,274 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:42,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:42,474 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:42,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:42,475 INFO L82 PathProgramCache]: Analyzing trace with hash 44304356, now seen corresponding path program 94 times [2021-03-10 21:21:42,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:42,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039212555] [2021-03-10 21:21:42,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:42,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039212555] [2021-03-10 21:21:42,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285869174] [2021-03-10 21:21:42,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:42,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:21:42,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:42,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:21:42,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:42,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:42,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:21:42,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600202237] [2021-03-10 21:21:42,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:21:42,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:42,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:21:42,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:21:42,786 INFO L87 Difference]: Start difference. First operand 42943 states and 168541 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:44,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:44,974 INFO L93 Difference]: Finished difference Result 72540 states and 274174 transitions. [2021-03-10 21:21:44,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 21:21:44,976 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:21:44,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:45,165 INFO L225 Difference]: With dead ends: 72540 [2021-03-10 21:21:45,165 INFO L226 Difference]: Without dead ends: 72522 [2021-03-10 21:21:45,166 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1513.4ms TimeCoverageRelationStatistics Valid=593, Invalid=2269, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 21:21:45,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72522 states. [2021-03-10 21:21:46,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72522 to 42930. [2021-03-10 21:21:46,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42930 states, 42929 states have (on average 3.92459642665797) internal successors, (168479), 42929 states have internal predecessors, (168479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:46,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42930 states to 42930 states and 168479 transitions. [2021-03-10 21:21:46,741 INFO L78 Accepts]: Start accepts. Automaton has 42930 states and 168479 transitions. Word has length 25 [2021-03-10 21:21:46,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:46,741 INFO L480 AbstractCegarLoop]: Abstraction has 42930 states and 168479 transitions. [2021-03-10 21:21:46,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:46,742 INFO L276 IsEmpty]: Start isEmpty. Operand 42930 states and 168479 transitions. [2021-03-10 21:21:46,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:21:46,816 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:46,816 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:47,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:47,016 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:47,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:47,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1788668362, now seen corresponding path program 95 times [2021-03-10 21:21:47,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:47,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190597223] [2021-03-10 21:21:47,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:47,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190597223] [2021-03-10 21:21:47,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86284393] [2021-03-10 21:21:47,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:47,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:21:47,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:47,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:21:47,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:47,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:47,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:21:47,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382940566] [2021-03-10 21:21:47,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:21:47,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:47,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:21:47,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:21:47,334 INFO L87 Difference]: Start difference. First operand 42930 states and 168479 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:49,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:49,109 INFO L93 Difference]: Finished difference Result 59679 states and 226607 transitions. [2021-03-10 21:21:49,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 21:21:49,110 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:21:49,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:49,276 INFO L225 Difference]: With dead ends: 59679 [2021-03-10 21:21:49,276 INFO L226 Difference]: Without dead ends: 59653 [2021-03-10 21:21:49,276 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1272.1ms TimeCoverageRelationStatistics Valid=456, Invalid=1614, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:21:49,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59653 states. [2021-03-10 21:21:50,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59653 to 42909. [2021-03-10 21:21:50,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42909 states, 42908 states have (on average 3.9246993567633077) internal successors, (168401), 42908 states have internal predecessors, (168401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:50,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42909 states to 42909 states and 168401 transitions. [2021-03-10 21:21:50,504 INFO L78 Accepts]: Start accepts. Automaton has 42909 states and 168401 transitions. Word has length 25 [2021-03-10 21:21:50,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:50,504 INFO L480 AbstractCegarLoop]: Abstraction has 42909 states and 168401 transitions. [2021-03-10 21:21:50,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:50,504 INFO L276 IsEmpty]: Start isEmpty. Operand 42909 states and 168401 transitions. [2021-03-10 21:21:50,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:21:50,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:50,805 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:51,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-03-10 21:21:51,005 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:51,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:51,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1822725736, now seen corresponding path program 96 times [2021-03-10 21:21:51,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:51,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611936904] [2021-03-10 21:21:51,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:51,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611936904] [2021-03-10 21:21:51,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903883601] [2021-03-10 21:21:51,083 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 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 [2021-03-10 21:21:51,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:21:51,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:21:51,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:21:51,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:51,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:51,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:21:51,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187426388] [2021-03-10 21:21:51,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:21:51,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:51,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:21:51,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:21:51,323 INFO L87 Difference]: Start difference. First operand 42909 states and 168401 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:21:53,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:53,731 INFO L93 Difference]: Finished difference Result 70768 states and 265935 transitions. [2021-03-10 21:21:53,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 21:21:53,733 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-03-10 21:21:53,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:53,917 INFO L225 Difference]: With dead ends: 70768 [2021-03-10 21:21:53,917 INFO L226 Difference]: Without dead ends: 70747 [2021-03-10 21:21:53,918 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1507.3ms TimeCoverageRelationStatistics Valid=545, Invalid=2005, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:21:53,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70747 states. [2021-03-10 21:21:55,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70747 to 46142. [2021-03-10 21:21:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46142 states, 46141 states have (on average 3.9316226349667325) internal successors, (181409), 46141 states have internal predecessors, (181409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46142 states to 46142 states and 181409 transitions. [2021-03-10 21:21:55,462 INFO L78 Accepts]: Start accepts. Automaton has 46142 states and 181409 transitions. Word has length 25 [2021-03-10 21:21:55,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:21:55,463 INFO L480 AbstractCegarLoop]: Abstraction has 46142 states and 181409 transitions. [2021-03-10 21:21:55,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-03-10 21:21:55,463 INFO L276 IsEmpty]: Start isEmpty. Operand 46142 states and 181409 transitions. [2021-03-10 21:21:55,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:21:55,536 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:21:55,537 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:21:55,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:55,737 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:21:55,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:21:55,737 INFO L82 PathProgramCache]: Analyzing trace with hash -547677804, now seen corresponding path program 97 times [2021-03-10 21:21:55,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:21:55,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580820513] [2021-03-10 21:21:55,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:21:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:55,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:55,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580820513] [2021-03-10 21:21:55,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120253878] [2021-03-10 21:21:55,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:21:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:21:55,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:21:55,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:21:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:21:56,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:21:56,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-03-10 21:21:56,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208256630] [2021-03-10 21:21:56,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:21:56,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:21:56,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:21:56,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:21:56,062 INFO L87 Difference]: Start difference. First operand 46142 states and 181409 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:21:58,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:21:58,368 INFO L93 Difference]: Finished difference Result 70061 states and 263721 transitions. [2021-03-10 21:21:58,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 21:21:58,370 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:21:58,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:21:58,847 INFO L225 Difference]: With dead ends: 70061 [2021-03-10 21:21:58,847 INFO L226 Difference]: Without dead ends: 70061 [2021-03-10 21:21:58,847 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1575.2ms TimeCoverageRelationStatistics Valid=637, Invalid=2333, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 21:21:58,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70061 states. [2021-03-10 21:21:59,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70061 to 46133. [2021-03-10 21:21:59,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46133 states, 46132 states have (on average 3.931414202722622) internal successors, (181364), 46132 states have internal predecessors, (181364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:00,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46133 states to 46133 states and 181364 transitions. [2021-03-10 21:22:00,080 INFO L78 Accepts]: Start accepts. Automaton has 46133 states and 181364 transitions. Word has length 25 [2021-03-10 21:22:00,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:00,080 INFO L480 AbstractCegarLoop]: Abstraction has 46133 states and 181364 transitions. [2021-03-10 21:22:00,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:00,080 INFO L276 IsEmpty]: Start isEmpty. Operand 46133 states and 181364 transitions. [2021-03-10 21:22:00,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:22:00,156 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:00,156 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:00,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-03-10 21:22:00,356 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:00,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:00,357 INFO L82 PathProgramCache]: Analyzing trace with hash -61873700, now seen corresponding path program 98 times [2021-03-10 21:22:00,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:00,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958600971] [2021-03-10 21:22:00,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:00,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958600971] [2021-03-10 21:22:00,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103004608] [2021-03-10 21:22:00,448 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 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 [2021-03-10 21:22:00,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:22:00,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:00,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:22:00,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:00,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:00,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-03-10 21:22:00,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023645645] [2021-03-10 21:22:00,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:22:00,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:00,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:22:00,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:22:00,685 INFO L87 Difference]: Start difference. First operand 46133 states and 181364 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:03,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:03,393 INFO L93 Difference]: Finished difference Result 66793 states and 252387 transitions. [2021-03-10 21:22:03,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 21:22:03,396 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:22:03,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:03,587 INFO L225 Difference]: With dead ends: 66793 [2021-03-10 21:22:03,587 INFO L226 Difference]: Without dead ends: 66779 [2021-03-10 21:22:03,587 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 1629.8ms TimeCoverageRelationStatistics Valid=643, Invalid=2549, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 21:22:03,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66779 states. [2021-03-10 21:22:04,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66779 to 46121. [2021-03-10 21:22:04,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46121 states, 46120 states have (on average 3.9313313096270597) internal successors, (181313), 46120 states have internal predecessors, (181313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:04,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46121 states to 46121 states and 181313 transitions. [2021-03-10 21:22:04,829 INFO L78 Accepts]: Start accepts. Automaton has 46121 states and 181313 transitions. Word has length 25 [2021-03-10 21:22:04,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:04,829 INFO L480 AbstractCegarLoop]: Abstraction has 46121 states and 181313 transitions. [2021-03-10 21:22:04,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:04,829 INFO L276 IsEmpty]: Start isEmpty. Operand 46121 states and 181313 transitions. [2021-03-10 21:22:04,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:22:04,908 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:04,908 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:05,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:05,108 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:05,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:05,109 INFO L82 PathProgramCache]: Analyzing trace with hash -698340554, now seen corresponding path program 99 times [2021-03-10 21:22:05,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:05,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421584016] [2021-03-10 21:22:05,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:05,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421584016] [2021-03-10 21:22:05,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044354148] [2021-03-10 21:22:05,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:22:05,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:22:05,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:05,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:22:05,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:05,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:05,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-03-10 21:22:05,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259582270] [2021-03-10 21:22:05,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:22:05,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:05,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:22:05,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:22:05,476 INFO L87 Difference]: Start difference. First operand 46121 states and 181313 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:07,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:07,300 INFO L93 Difference]: Finished difference Result 61745 states and 236680 transitions. [2021-03-10 21:22:07,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:22:07,301 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:22:07,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:07,840 INFO L225 Difference]: With dead ends: 61745 [2021-03-10 21:22:07,840 INFO L226 Difference]: Without dead ends: 61721 [2021-03-10 21:22:07,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1313.0ms TimeCoverageRelationStatistics Valid=445, Invalid=1717, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 21:22:07,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61721 states. [2021-03-10 21:22:08,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61721 to 46081. [2021-03-10 21:22:08,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46081 states, 46080 states have (on average 3.931640625) internal successors, (181170), 46080 states have internal predecessors, (181170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:09,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46081 states to 46081 states and 181170 transitions. [2021-03-10 21:22:09,095 INFO L78 Accepts]: Start accepts. Automaton has 46081 states and 181170 transitions. Word has length 25 [2021-03-10 21:22:09,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:09,095 INFO L480 AbstractCegarLoop]: Abstraction has 46081 states and 181170 transitions. [2021-03-10 21:22:09,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:09,095 INFO L276 IsEmpty]: Start isEmpty. Operand 46081 states and 181170 transitions. [2021-03-10 21:22:09,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:22:09,170 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:09,170 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:09,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:09,371 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:09,371 INFO L82 PathProgramCache]: Analyzing trace with hash -901130092, now seen corresponding path program 57 times [2021-03-10 21:22:09,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:09,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706969241] [2021-03-10 21:22:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:09,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706969241] [2021-03-10 21:22:09,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473036434] [2021-03-10 21:22:09,457 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 [2021-03-10 21:22:09,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:22:09,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:09,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:22:09,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:09,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:09,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:22:09,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574697039] [2021-03-10 21:22:09,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:22:09,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:09,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:22:09,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:22:09,724 INFO L87 Difference]: Start difference. First operand 46081 states and 181170 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:10,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:10,771 INFO L93 Difference]: Finished difference Result 47008 states and 183685 transitions. [2021-03-10 21:22:10,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:22:10,773 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:22:10,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:10,895 INFO L225 Difference]: With dead ends: 47008 [2021-03-10 21:22:10,896 INFO L226 Difference]: Without dead ends: 47001 [2021-03-10 21:22:10,896 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 605.4ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:22:10,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47001 states. [2021-03-10 21:22:11,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47001 to 46162. [2021-03-10 21:22:11,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46162 states, 46161 states have (on average 3.9308507181386885) internal successors, (181452), 46161 states have internal predecessors, (181452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:12,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46162 states to 46162 states and 181452 transitions. [2021-03-10 21:22:12,074 INFO L78 Accepts]: Start accepts. Automaton has 46162 states and 181452 transitions. Word has length 25 [2021-03-10 21:22:12,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:12,074 INFO L480 AbstractCegarLoop]: Abstraction has 46162 states and 181452 transitions. [2021-03-10 21:22:12,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:12,074 INFO L276 IsEmpty]: Start isEmpty. Operand 46162 states and 181452 transitions. [2021-03-10 21:22:12,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:22:12,148 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:12,148 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:12,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-03-10 21:22:12,348 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:12,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:12,348 INFO L82 PathProgramCache]: Analyzing trace with hash 203464600, now seen corresponding path program 58 times [2021-03-10 21:22:12,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:12,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981527436] [2021-03-10 21:22:12,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:12,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981527436] [2021-03-10 21:22:12,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928778159] [2021-03-10 21:22:12,433 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 [2021-03-10 21:22:12,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:22:12,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:12,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:22:12,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:12,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:12,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:22:12,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532524307] [2021-03-10 21:22:12,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:22:12,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:12,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:22:12,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:22:12,698 INFO L87 Difference]: Start difference. First operand 46162 states and 181452 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-03-10 21:22:14,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:14,166 INFO L93 Difference]: Finished difference Result 47173 states and 184209 transitions. [2021-03-10 21:22:14,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:22:14,168 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-03-10 21:22:14,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:14,283 INFO L225 Difference]: With dead ends: 47173 [2021-03-10 21:22:14,283 INFO L226 Difference]: Without dead ends: 47173 [2021-03-10 21:22:14,283 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 694.0ms TimeCoverageRelationStatistics Valid=262, Invalid=928, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:22:14,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47173 states. [2021-03-10 21:22:15,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47173 to 46027. [2021-03-10 21:22:15,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46027 states, 46026 states have (on average 3.932733672272194) internal successors, (181008), 46026 states have internal predecessors, (181008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:15,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46027 states to 46027 states and 181008 transitions. [2021-03-10 21:22:15,428 INFO L78 Accepts]: Start accepts. Automaton has 46027 states and 181008 transitions. Word has length 25 [2021-03-10 21:22:15,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:15,428 INFO L480 AbstractCegarLoop]: Abstraction has 46027 states and 181008 transitions. [2021-03-10 21:22:15,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-03-10 21:22:15,428 INFO L276 IsEmpty]: Start isEmpty. Operand 46027 states and 181008 transitions. [2021-03-10 21:22:15,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:22:15,500 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:15,500 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:15,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:15,701 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:15,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:15,701 INFO L82 PathProgramCache]: Analyzing trace with hash 118243368, now seen corresponding path program 16 times [2021-03-10 21:22:15,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:15,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506456114] [2021-03-10 21:22:15,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:15,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506456114] [2021-03-10 21:22:15,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687368934] [2021-03-10 21:22:15,773 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 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 [2021-03-10 21:22:15,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:22:15,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:15,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:22:15,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:16,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:16,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-03-10 21:22:16,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661568247] [2021-03-10 21:22:16,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:22:16,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:16,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:22:16,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:22:16,048 INFO L87 Difference]: Start difference. First operand 46027 states and 181008 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:17,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:17,361 INFO L93 Difference]: Finished difference Result 46443 states and 182086 transitions. [2021-03-10 21:22:17,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:22:17,363 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:22:17,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:17,476 INFO L225 Difference]: With dead ends: 46443 [2021-03-10 21:22:17,477 INFO L226 Difference]: Without dead ends: 46443 [2021-03-10 21:22:17,477 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 891.9ms TimeCoverageRelationStatistics Valid=321, Invalid=1319, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:22:17,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46443 states. [2021-03-10 21:22:18,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46443 to 46095. [2021-03-10 21:22:18,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46095 states, 46094 states have (on average 3.9314878292185536) internal successors, (181218), 46094 states have internal predecessors, (181218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46095 states to 46095 states and 181218 transitions. [2021-03-10 21:22:18,634 INFO L78 Accepts]: Start accepts. Automaton has 46095 states and 181218 transitions. Word has length 25 [2021-03-10 21:22:18,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:18,635 INFO L480 AbstractCegarLoop]: Abstraction has 46095 states and 181218 transitions. [2021-03-10 21:22:18,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:18,635 INFO L276 IsEmpty]: Start isEmpty. Operand 46095 states and 181218 transitions. [2021-03-10 21:22:18,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:22:18,729 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:18,729 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:18,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:18,943 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:18,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:18,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1002298468, now seen corresponding path program 17 times [2021-03-10 21:22:18,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:18,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239482849] [2021-03-10 21:22:18,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:18,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239482849] [2021-03-10 21:22:18,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131093131] [2021-03-10 21:22:18,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:19,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:22:19,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:19,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:22:19,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:19,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:19,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 21:22:19,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282036345] [2021-03-10 21:22:19,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:22:19,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:19,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:22:19,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:22:19,150 INFO L87 Difference]: Start difference. First operand 46095 states and 181218 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:20,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:20,117 INFO L93 Difference]: Finished difference Result 73392 states and 283504 transitions. [2021-03-10 21:22:20,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:22:20,119 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:22:20,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:20,313 INFO L225 Difference]: With dead ends: 73392 [2021-03-10 21:22:20,313 INFO L226 Difference]: Without dead ends: 73366 [2021-03-10 21:22:20,313 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 215.5ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:22:20,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73366 states. [2021-03-10 21:22:21,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73366 to 61230. [2021-03-10 21:22:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61230 states, 61229 states have (on average 3.9815446928742917) internal successors, (243786), 61229 states have internal predecessors, (243786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:21,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61230 states to 61230 states and 243786 transitions. [2021-03-10 21:22:21,934 INFO L78 Accepts]: Start accepts. Automaton has 61230 states and 243786 transitions. Word has length 25 [2021-03-10 21:22:21,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:21,934 INFO L480 AbstractCegarLoop]: Abstraction has 61230 states and 243786 transitions. [2021-03-10 21:22:21,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:21,935 INFO L276 IsEmpty]: Start isEmpty. Operand 61230 states and 243786 transitions. [2021-03-10 21:22:22,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:22:22,048 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:22,048 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:22,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:22,248 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:22,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:22,248 INFO L82 PathProgramCache]: Analyzing trace with hash -170939552, now seen corresponding path program 18 times [2021-03-10 21:22:22,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:22,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050065441] [2021-03-10 21:22:22,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:22,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050065441] [2021-03-10 21:22:22,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765895190] [2021-03-10 21:22:22,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:22,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:22:22,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:22,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:22:22,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:22,846 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-03-10 21:22:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:22,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:22,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:22:22,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969427395] [2021-03-10 21:22:22,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:22:22,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:22,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:22:22,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:22:22,953 INFO L87 Difference]: Start difference. First operand 61230 states and 243786 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:24,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:24,403 INFO L93 Difference]: Finished difference Result 62484 states and 247025 transitions. [2021-03-10 21:22:24,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:22:24,405 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:22:24,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:24,572 INFO L225 Difference]: With dead ends: 62484 [2021-03-10 21:22:24,572 INFO L226 Difference]: Without dead ends: 62484 [2021-03-10 21:22:24,573 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1250.1ms TimeCoverageRelationStatistics Valid=316, Invalid=1166, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:22:24,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62484 states. [2021-03-10 21:22:25,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62484 to 61380. [2021-03-10 21:22:25,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61380 states, 61379 states have (on average 3.9795858518385767) internal successors, (244263), 61379 states have internal predecessors, (244263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:25,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61380 states to 61380 states and 244263 transitions. [2021-03-10 21:22:25,984 INFO L78 Accepts]: Start accepts. Automaton has 61380 states and 244263 transitions. Word has length 25 [2021-03-10 21:22:25,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:25,984 INFO L480 AbstractCegarLoop]: Abstraction has 61380 states and 244263 transitions. [2021-03-10 21:22:25,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:25,984 INFO L276 IsEmpty]: Start isEmpty. Operand 61380 states and 244263 transitions. [2021-03-10 21:22:26,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:22:26,090 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:26,091 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:26,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:26,291 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:26,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:26,291 INFO L82 PathProgramCache]: Analyzing trace with hash -604049820, now seen corresponding path program 19 times [2021-03-10 21:22:26,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:26,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755795908] [2021-03-10 21:22:26,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:26,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755795908] [2021-03-10 21:22:26,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993741848] [2021-03-10 21:22:26,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:26,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:22:26,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:22:26,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:26,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 21:22:26,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336988757] [2021-03-10 21:22:26,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:22:26,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:26,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:22:26,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:22:26,502 INFO L87 Difference]: Start difference. First operand 61380 states and 244263 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:27,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:27,565 INFO L93 Difference]: Finished difference Result 82749 states and 315087 transitions. [2021-03-10 21:22:27,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:22:27,567 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:22:27,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:27,784 INFO L225 Difference]: With dead ends: 82749 [2021-03-10 21:22:27,784 INFO L226 Difference]: Without dead ends: 82749 [2021-03-10 21:22:27,784 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 315.9ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:22:27,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82749 states. [2021-03-10 21:22:29,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82749 to 59640. [2021-03-10 21:22:29,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59640 states, 59639 states have (on average 3.970220828652392) internal successors, (236780), 59639 states have internal predecessors, (236780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:29,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59640 states to 59640 states and 236780 transitions. [2021-03-10 21:22:29,845 INFO L78 Accepts]: Start accepts. Automaton has 59640 states and 236780 transitions. Word has length 25 [2021-03-10 21:22:29,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:29,845 INFO L480 AbstractCegarLoop]: Abstraction has 59640 states and 236780 transitions. [2021-03-10 21:22:29,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:29,845 INFO L276 IsEmpty]: Start isEmpty. Operand 59640 states and 236780 transitions. [2021-03-10 21:22:30,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:22:30,011 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:30,011 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:30,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:30,212 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:30,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:30,212 INFO L82 PathProgramCache]: Analyzing trace with hash -297815200, now seen corresponding path program 20 times [2021-03-10 21:22:30,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:30,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122420450] [2021-03-10 21:22:30,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:30,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122420450] [2021-03-10 21:22:30,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888454967] [2021-03-10 21:22:30,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:22:30,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:22:30,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:30,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:22:30,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:30,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:30,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:22:30,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115284958] [2021-03-10 21:22:30,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:22:30,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:30,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:22:30,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:22:30,553 INFO L87 Difference]: Start difference. First operand 59640 states and 236780 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:31,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:31,985 INFO L93 Difference]: Finished difference Result 60378 states and 238589 transitions. [2021-03-10 21:22:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:22:31,987 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:22:31,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:32,157 INFO L225 Difference]: With dead ends: 60378 [2021-03-10 21:22:32,157 INFO L226 Difference]: Without dead ends: 60371 [2021-03-10 21:22:32,157 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 828.1ms TimeCoverageRelationStatistics Valid=282, Invalid=1124, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:22:32,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60371 states. [2021-03-10 21:22:33,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60371 to 59640. [2021-03-10 21:22:33,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59640 states, 59639 states have (on average 3.970187293549523) internal successors, (236778), 59639 states have internal predecessors, (236778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:33,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59640 states to 59640 states and 236778 transitions. [2021-03-10 21:22:33,582 INFO L78 Accepts]: Start accepts. Automaton has 59640 states and 236778 transitions. Word has length 25 [2021-03-10 21:22:33,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:33,582 INFO L480 AbstractCegarLoop]: Abstraction has 59640 states and 236778 transitions. [2021-03-10 21:22:33,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:33,582 INFO L276 IsEmpty]: Start isEmpty. Operand 59640 states and 236778 transitions. [2021-03-10 21:22:33,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:22:33,979 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:33,979 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:34,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:34,195 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:34,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:34,195 INFO L82 PathProgramCache]: Analyzing trace with hash 2110520852, now seen corresponding path program 21 times [2021-03-10 21:22:34,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:34,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897797681] [2021-03-10 21:22:34,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:34,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897797681] [2021-03-10 21:22:34,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120272384] [2021-03-10 21:22:34,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:34,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:22:34,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:34,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:22:34,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:34,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:34,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:22:34,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248089502] [2021-03-10 21:22:34,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:22:34,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:34,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:22:34,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:22:34,560 INFO L87 Difference]: Start difference. First operand 59640 states and 236778 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:36,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:36,292 INFO L93 Difference]: Finished difference Result 61587 states and 241992 transitions. [2021-03-10 21:22:36,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 21:22:36,293 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:22:36,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:36,462 INFO L225 Difference]: With dead ends: 61587 [2021-03-10 21:22:36,462 INFO L226 Difference]: Without dead ends: 61587 [2021-03-10 21:22:36,463 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1130.8ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:22:36,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61587 states. [2021-03-10 21:22:37,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61587 to 59994. [2021-03-10 21:22:37,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59994 states, 59993 states have (on average 3.9657460037004317) internal successors, (237917), 59993 states have internal predecessors, (237917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:37,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59994 states to 59994 states and 237917 transitions. [2021-03-10 21:22:37,870 INFO L78 Accepts]: Start accepts. Automaton has 59994 states and 237917 transitions. Word has length 25 [2021-03-10 21:22:37,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:37,871 INFO L480 AbstractCegarLoop]: Abstraction has 59994 states and 237917 transitions. [2021-03-10 21:22:37,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:37,871 INFO L276 IsEmpty]: Start isEmpty. Operand 59994 states and 237917 transitions. [2021-03-10 21:22:38,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:22:38,245 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:38,245 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:38,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-03-10 21:22:38,459 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:38,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:38,459 INFO L82 PathProgramCache]: Analyzing trace with hash 698853140, now seen corresponding path program 22 times [2021-03-10 21:22:38,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:38,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175144191] [2021-03-10 21:22:38,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:38,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:38,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175144191] [2021-03-10 21:22:38,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113645812] [2021-03-10 21:22:38,515 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 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 [2021-03-10 21:22:38,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:22:38,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:38,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:22:38,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:22:38,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:38,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-03-10 21:22:38,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687879275] [2021-03-10 21:22:38,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:22:38,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:38,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:22:38,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:22:38,658 INFO L87 Difference]: Start difference. First operand 59994 states and 237917 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:39,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:39,370 INFO L93 Difference]: Finished difference Result 81683 states and 316037 transitions. [2021-03-10 21:22:39,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:22:39,372 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:22:39,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:39,595 INFO L225 Difference]: With dead ends: 81683 [2021-03-10 21:22:39,595 INFO L226 Difference]: Without dead ends: 81677 [2021-03-10 21:22:39,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 227.4ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:22:39,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81677 states. [2021-03-10 21:22:41,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81677 to 66665. [2021-03-10 21:22:41,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66665 states, 66664 states have (on average 3.9792541701668065) internal successors, (265273), 66664 states have internal predecessors, (265273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:41,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66665 states to 66665 states and 265273 transitions. [2021-03-10 21:22:41,754 INFO L78 Accepts]: Start accepts. Automaton has 66665 states and 265273 transitions. Word has length 25 [2021-03-10 21:22:41,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:41,754 INFO L480 AbstractCegarLoop]: Abstraction has 66665 states and 265273 transitions. [2021-03-10 21:22:41,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:41,754 INFO L276 IsEmpty]: Start isEmpty. Operand 66665 states and 265273 transitions. [2021-03-10 21:22:41,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:22:41,869 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:41,869 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:42,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-03-10 21:22:42,071 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:42,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:42,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1677410584, now seen corresponding path program 23 times [2021-03-10 21:22:42,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:42,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052412819] [2021-03-10 21:22:42,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:22:42,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052412819] [2021-03-10 21:22:42,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097367366] [2021-03-10 21:22:42,116 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 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 [2021-03-10 21:22:42,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:22:42,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:42,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:22:42,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:22:42,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:42,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 21:22:42,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813726326] [2021-03-10 21:22:42,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:22:42,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:42,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:22:42,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:22:42,316 INFO L87 Difference]: Start difference. First operand 66665 states and 265273 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:43,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:43,133 INFO L93 Difference]: Finished difference Result 88628 states and 338516 transitions. [2021-03-10 21:22:43,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:22:43,135 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:22:43,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:43,370 INFO L225 Difference]: With dead ends: 88628 [2021-03-10 21:22:43,370 INFO L226 Difference]: Without dead ends: 88621 [2021-03-10 21:22:43,370 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 345.9ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:22:43,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88621 states. [2021-03-10 21:22:45,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88621 to 65399. [2021-03-10 21:22:45,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65399 states, 65398 states have (on average 3.972644423376862) internal successors, (259803), 65398 states have internal predecessors, (259803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:45,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65399 states to 65399 states and 259803 transitions. [2021-03-10 21:22:45,490 INFO L78 Accepts]: Start accepts. Automaton has 65399 states and 259803 transitions. Word has length 25 [2021-03-10 21:22:45,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:45,490 INFO L480 AbstractCegarLoop]: Abstraction has 65399 states and 259803 transitions. [2021-03-10 21:22:45,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:45,491 INFO L276 IsEmpty]: Start isEmpty. Operand 65399 states and 259803 transitions. [2021-03-10 21:22:45,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:22:45,601 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:45,601 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:45,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-03-10 21:22:45,803 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:45,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:45,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1983645204, now seen corresponding path program 24 times [2021-03-10 21:22:45,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:45,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164652067] [2021-03-10 21:22:45,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:22:45,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164652067] [2021-03-10 21:22:45,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200207705] [2021-03-10 21:22:45,871 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 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 [2021-03-10 21:22:45,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:22:45,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:22:45,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:22:45,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:22:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:46,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:22:46,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:22:46,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768795042] [2021-03-10 21:22:46,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:22:46,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:22:46,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:22:46,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:22:46,152 INFO L87 Difference]: Start difference. First operand 65399 states and 259803 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:48,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:22:48,158 INFO L93 Difference]: Finished difference Result 66631 states and 262831 transitions. [2021-03-10 21:22:48,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:22:48,160 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:22:48,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:22:48,430 INFO L225 Difference]: With dead ends: 66631 [2021-03-10 21:22:48,430 INFO L226 Difference]: Without dead ends: 66610 [2021-03-10 21:22:48,430 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 952.7ms TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:22:48,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66610 states. [2021-03-10 21:22:49,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66610 to 65301. [2021-03-10 21:22:49,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65301 states, 65300 states have (on average 3.9736600306278715) internal successors, (259480), 65300 states have internal predecessors, (259480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:50,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65301 states to 65301 states and 259480 transitions. [2021-03-10 21:22:50,265 INFO L78 Accepts]: Start accepts. Automaton has 65301 states and 259480 transitions. Word has length 25 [2021-03-10 21:22:50,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:22:50,265 INFO L480 AbstractCegarLoop]: Abstraction has 65301 states and 259480 transitions. [2021-03-10 21:22:50,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:22:50,266 INFO L276 IsEmpty]: Start isEmpty. Operand 65301 states and 259480 transitions. [2021-03-10 21:22:50,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:22:50,404 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:22:50,404 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:22:50,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:22:50,623 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:22:50,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:22:50,624 INFO L82 PathProgramCache]: Analyzing trace with hash -403061012, now seen corresponding path program 25 times [2021-03-10 21:22:50,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:22:50,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938767549] [2021-03-10 21:22:50,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:22:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:22:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:22:50,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938767549] [2021-03-10 21:22:50,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669183703] [2021-03-10 21:22:50,678 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)