/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 06:57:20,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 06:57:20,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 06:57:20,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 06:57:20,373 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 06:57:20,405 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 06:57:20,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 06:57:20,405 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 06:57:20,405 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 06:57:20,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 06:57:20,407 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 06:57:20,407 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 06:57:20,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 06:57:20,408 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 06:57:20,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 06:57:20,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 06:57:20,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 06:57:20,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 06:57:20,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 06:57:20,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 06:57:20,409 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 06:57:20,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 06:57:20,409 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 06:57:20,409 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 06:57:20,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 06:57:20,409 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 06:57:20,409 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 06:57:20,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 06:57:20,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:57:20,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 06:57:20,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 06:57:20,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 06:57:20,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 06:57:20,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 06:57:20,410 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 06:57:20,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 06:57:20,410 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 06:57:20,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 06:57:20,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 06:57:20,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 06:57:20,715 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 06:57:20,717 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 06:57:20,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl [2021-06-05 06:57:20,718 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl' [2021-06-05 06:57:20,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 06:57:20,761 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 06:57:20,762 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 06:57:20,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 06:57:20,763 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 06:57:20,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:57:20" (1/1) ... [2021-06-05 06:57:20,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:57:20" (1/1) ... [2021-06-05 06:57:20,782 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 06:57:20,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 06:57:20,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 06:57:20,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 06:57:20,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:57:20" (1/1) ... [2021-06-05 06:57:20,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:57:20" (1/1) ... [2021-06-05 06:57:20,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:57:20" (1/1) ... [2021-06-05 06:57:20,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:57:20" (1/1) ... [2021-06-05 06:57:20,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:57:20" (1/1) ... [2021-06-05 06:57:20,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:57:20" (1/1) ... [2021-06-05 06:57:20,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:57:20" (1/1) ... [2021-06-05 06:57:20,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 06:57:20,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 06:57:20,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 06:57:20,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 06:57:20,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:57:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:57:20,855 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 06:57:20,856 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 06:57:20,856 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 06:57:20,856 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 06:57:20,856 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 06:57:20,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 06:57:20,857 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 06:57:20,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 06:57:20,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 06:57:20,857 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 06:57:20,994 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 06:57:20,994 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 06:57:20,995 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:57:20 BoogieIcfgContainer [2021-06-05 06:57:20,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 06:57:20,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 06:57:20,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 06:57:20,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 06:57:20,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:57:20" (1/2) ... [2021-06-05 06:57:21,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52a7805a and model type nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:57:20, skipping insertion in model container [2021-06-05 06:57:21,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:57:20" (2/2) ... [2021-06-05 06:57:21,001 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-counter-alt2.wvr.bpl [2021-06-05 06:57:21,004 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 06:57:21,004 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 06:57:21,005 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 06:57:21,005 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 06:57:21,048 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 06:57:21,089 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 06:57:21,114 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 06:57:21,115 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 06:57:21,115 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 06:57:21,115 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 06:57:21,115 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 06:57:21,115 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 06:57:21,115 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 06:57:21,115 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 06:57:21,126 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-06-05 06:57:21,138 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:21,139 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:21,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 06:57:21,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:21,150 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:21,150 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:21,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:21,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1715863245, now seen corresponding path program 1 times [2021-06-05 06:57:21,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:21,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104574922] [2021-06-05 06:57:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:21,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:21,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104574922] [2021-06-05 06:57:21,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104574922] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:57:21,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:57:21,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 06:57:21,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968006289] [2021-06-05 06:57:21,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:57:21,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:21,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:57:21,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:57:21,311 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2021-06-05 06:57:21,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:21,362 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-06-05 06:57:21,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 06:57:21,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 [2021-06-05 06:57:21,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:21,368 INFO L225 Difference]: With dead ends: 43 [2021-06-05 06:57:21,368 INFO L226 Difference]: Without dead ends: 43 [2021-06-05 06:57:21,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:57:21,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-05 06:57:21,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-06-05 06:57:21,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:21,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-06-05 06:57:21,399 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-06-05 06:57:21,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:21,400 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-06-05 06:57:21,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2021-06-05 06:57:21,400 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-06-05 06:57:21,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 06:57:21,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:21,402 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:21,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 06:57:21,402 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:21,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:21,405 INFO L82 PathProgramCache]: Analyzing trace with hash -599854287, now seen corresponding path program 1 times [2021-06-05 06:57:21,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:21,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747508359] [2021-06-05 06:57:21,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:57:21,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:21,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747508359] [2021-06-05 06:57:21,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747508359] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:57:21,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:57:21,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 06:57:21,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499414456] [2021-06-05 06:57:21,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:57:21,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:21,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:57:21,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:57:21,486 INFO L87 Difference]: Start difference. First operand 38 states and 67 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) [2021-06-05 06:57:21,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:21,517 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-06-05 06:57:21,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 06:57:21,518 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 [2021-06-05 06:57:21,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:21,520 INFO L225 Difference]: With dead ends: 50 [2021-06-05 06:57:21,520 INFO L226 Difference]: Without dead ends: 50 [2021-06-05 06:57:21,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:57:21,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-05 06:57:21,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-06-05 06:57:21,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:21,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-06-05 06:57:21,529 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-06-05 06:57:21,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:21,529 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-06-05 06:57:21,529 INFO L483 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) [2021-06-05 06:57:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-06-05 06:57:21,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 06:57:21,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:21,530 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:21,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 06:57:21,530 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:21,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:21,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1329802641, now seen corresponding path program 1 times [2021-06-05 06:57:21,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:21,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084832254] [2021-06-05 06:57:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:21,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:21,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084832254] [2021-06-05 06:57:21,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084832254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:21,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250659500] [2021-06-05 06:57:21,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:21,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:57:21,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:21,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250659500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:21,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:21,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:57:21,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190939702] [2021-06-05 06:57:21,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:57:21,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:21,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:57:21,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:57:21,981 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-06-05 06:57:22,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:22,067 INFO L93 Difference]: Finished difference Result 144 states and 274 transitions. [2021-06-05 06:57:22,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:57:22,067 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 19 [2021-06-05 06:57:22,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:22,068 INFO L225 Difference]: With dead ends: 144 [2021-06-05 06:57:22,068 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 06:57:22,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:57:22,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 06:57:22,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 55. [2021-06-05 06:57:22,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:22,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2021-06-05 06:57:22,074 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2021-06-05 06:57:22,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:22,074 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2021-06-05 06:57:22,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-06-05 06:57:22,074 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2021-06-05 06:57:22,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:57:22,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:22,075 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:22,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 06:57:22,291 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:22,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:22,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1564465709, now seen corresponding path program 2 times [2021-06-05 06:57:22,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:22,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609099195] [2021-06-05 06:57:22,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:22,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:22,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:22,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609099195] [2021-06-05 06:57:22,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609099195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:22,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907448211] [2021-06-05 06:57:22,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:22,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:57:22,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:22,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:57:22,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:22,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907448211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:22,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:22,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 06:57:22,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984809080] [2021-06-05 06:57:22,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:57:22,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:22,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:57:22,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:57:22,523 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:22,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:22,793 INFO L93 Difference]: Finished difference Result 167 states and 307 transitions. [2021-06-05 06:57:22,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:57:22,795 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 06:57:22,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:22,796 INFO L225 Difference]: With dead ends: 167 [2021-06-05 06:57:22,796 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 06:57:22,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 240.2ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:57:22,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 06:57:22,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 75. [2021-06-05 06:57:22,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:22,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 149 transitions. [2021-06-05 06:57:22,801 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 149 transitions. Word has length 21 [2021-06-05 06:57:22,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:22,802 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 149 transitions. [2021-06-05 06:57:22,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:22,802 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 149 transitions. [2021-06-05 06:57:22,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:57:22,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:22,803 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:23,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:23,017 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:23,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:23,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1814278047, now seen corresponding path program 3 times [2021-06-05 06:57:23,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:23,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195371373] [2021-06-05 06:57:23,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:23,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:23,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195371373] [2021-06-05 06:57:23,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195371373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:23,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939417527] [2021-06-05 06:57:23,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:23,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:57:23,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:23,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:57:23,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:23,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939417527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:23,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:23,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 06:57:23,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943388806] [2021-06-05 06:57:23,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:57:23,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:23,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:57:23,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:57:23,201 INFO L87 Difference]: Start difference. First operand 75 states and 149 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) [2021-06-05 06:57:23,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:23,429 INFO L93 Difference]: Finished difference Result 141 states and 267 transitions. [2021-06-05 06:57:23,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:57:23,430 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 [2021-06-05 06:57:23,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:23,431 INFO L225 Difference]: With dead ends: 141 [2021-06-05 06:57:23,431 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 06:57:23,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:57:23,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 06:57:23,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 77. [2021-06-05 06:57:23,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:23,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2021-06-05 06:57:23,435 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 21 [2021-06-05 06:57:23,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:23,435 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2021-06-05 06:57:23,435 INFO L483 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) [2021-06-05 06:57:23,435 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2021-06-05 06:57:23,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:57:23,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:23,436 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:23,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 06:57:23,653 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:23,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:23,653 INFO L82 PathProgramCache]: Analyzing trace with hash -709724757, now seen corresponding path program 4 times [2021-06-05 06:57:23,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:23,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036590670] [2021-06-05 06:57:23,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:23,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:23,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036590670] [2021-06-05 06:57:23,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036590670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:23,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586633290] [2021-06-05 06:57:23,779 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:23,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:57:23,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:23,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:57:23,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:24,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586633290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:24,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:24,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 06:57:24,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725857654] [2021-06-05 06:57:24,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:57:24,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:24,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:57:24,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:57:24,111 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:24,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:24,594 INFO L93 Difference]: Finished difference Result 350 states and 689 transitions. [2021-06-05 06:57:24,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:57:24,594 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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 23 [2021-06-05 06:57:24,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:24,596 INFO L225 Difference]: With dead ends: 350 [2021-06-05 06:57:24,596 INFO L226 Difference]: Without dead ends: 293 [2021-06-05 06:57:24,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 504.7ms TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:57:24,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-06-05 06:57:24,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 93. [2021-06-05 06:57:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.010869565217391) internal successors, (185), 92 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:24,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 185 transitions. [2021-06-05 06:57:24,601 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 185 transitions. Word has length 23 [2021-06-05 06:57:24,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:24,601 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 185 transitions. [2021-06-05 06:57:24,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:24,602 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 185 transitions. [2021-06-05 06:57:24,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:57:24,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:24,602 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:24,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:24,817 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:24,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:24,817 INFO L82 PathProgramCache]: Analyzing trace with hash -923989763, now seen corresponding path program 5 times [2021-06-05 06:57:24,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:24,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779507388] [2021-06-05 06:57:24,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:24,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:24,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779507388] [2021-06-05 06:57:24,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779507388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:24,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212574127] [2021-06-05 06:57:24,965 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:24,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:57:24,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:24,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:57:24,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:25,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212574127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:25,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:25,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 06:57:25,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752568220] [2021-06-05 06:57:25,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:57:25,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:25,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:57:25,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:57:25,269 INFO L87 Difference]: Start difference. First operand 93 states and 185 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:25,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:25,919 INFO L93 Difference]: Finished difference Result 326 states and 652 transitions. [2021-06-05 06:57:25,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:57:25,920 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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 23 [2021-06-05 06:57:25,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:25,921 INFO L225 Difference]: With dead ends: 326 [2021-06-05 06:57:25,921 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 06:57:25,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 594.7ms TimeCoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:57:25,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 06:57:25,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 120. [2021-06-05 06:57:25,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0672268907563027) internal successors, (246), 119 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:25,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 246 transitions. [2021-06-05 06:57:25,926 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 246 transitions. Word has length 23 [2021-06-05 06:57:25,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:25,926 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 246 transitions. [2021-06-05 06:57:25,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:25,927 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 246 transitions. [2021-06-05 06:57:25,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:57:25,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:25,927 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:26,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 06:57:26,141 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:26,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:26,141 INFO L82 PathProgramCache]: Analyzing trace with hash 656818999, now seen corresponding path program 6 times [2021-06-05 06:57:26,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:26,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811943808] [2021-06-05 06:57:26,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:26,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:26,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811943808] [2021-06-05 06:57:26,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811943808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:26,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693019365] [2021-06-05 06:57:26,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:26,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:57:26,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:26,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:57:26,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:26,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693019365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:26,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:26,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 06:57:26,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302795478] [2021-06-05 06:57:26,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:57:26,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:26,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:57:26,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:57:26,562 INFO L87 Difference]: Start difference. First operand 120 states and 246 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:27,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:27,599 INFO L93 Difference]: Finished difference Result 387 states and 768 transitions. [2021-06-05 06:57:27,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:57:27,600 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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 23 [2021-06-05 06:57:27,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:27,601 INFO L225 Difference]: With dead ends: 387 [2021-06-05 06:57:27,601 INFO L226 Difference]: Without dead ends: 341 [2021-06-05 06:57:27,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 976.1ms TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:57:27,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-06-05 06:57:27,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 124. [2021-06-05 06:57:27,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.073170731707317) internal successors, (255), 123 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:27,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 255 transitions. [2021-06-05 06:57:27,607 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 255 transitions. Word has length 23 [2021-06-05 06:57:27,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:27,607 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 255 transitions. [2021-06-05 06:57:27,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:27,607 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 255 transitions. [2021-06-05 06:57:27,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 06:57:27,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:27,608 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:27,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:27,821 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:27,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:27,821 INFO L82 PathProgramCache]: Analyzing trace with hash -73546911, now seen corresponding path program 7 times [2021-06-05 06:57:27,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:27,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773009018] [2021-06-05 06:57:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:27,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:27,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773009018] [2021-06-05 06:57:27,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773009018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:27,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743459698] [2021-06-05 06:57:27,922 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:27,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 06:57:27,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:57:28,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743459698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:28,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:28,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 06:57:28,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597814742] [2021-06-05 06:57:28,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:57:28,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:28,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:57:28,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:57:28,139 INFO L87 Difference]: Start difference. First operand 124 states and 255 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:28,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:28,620 INFO L93 Difference]: Finished difference Result 302 states and 585 transitions. [2021-06-05 06:57:28,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:57:28,621 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 06:57:28,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:28,626 INFO L225 Difference]: With dead ends: 302 [2021-06-05 06:57:28,626 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 06:57:28,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 425.6ms TimeCoverageRelationStatistics Valid=301, Invalid=1031, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:57:28,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 06:57:28,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 161. [2021-06-05 06:57:28,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2) internal successors, (352), 160 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:28,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 352 transitions. [2021-06-05 06:57:28,631 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 352 transitions. Word has length 23 [2021-06-05 06:57:28,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:28,631 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 352 transitions. [2021-06-05 06:57:28,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:28,632 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 352 transitions. [2021-06-05 06:57:28,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:57:28,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:28,632 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:28,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 06:57:28,851 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:28,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:28,851 INFO L82 PathProgramCache]: Analyzing trace with hash -170955159, now seen corresponding path program 8 times [2021-06-05 06:57:28,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:28,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361042491] [2021-06-05 06:57:28,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:28,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:28,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361042491] [2021-06-05 06:57:28,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361042491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:28,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661784907] [2021-06-05 06:57:28,912 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:28,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:57:28,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:28,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:57:28,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:29,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661784907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:29,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:29,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 06:57:29,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869595977] [2021-06-05 06:57:29,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:57:29,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:29,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:57:29,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:57:29,065 INFO L87 Difference]: Start difference. First operand 161 states and 352 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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) [2021-06-05 06:57:29,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:29,498 INFO L93 Difference]: Finished difference Result 404 states and 806 transitions. [2021-06-05 06:57:29,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:57:29,502 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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 25 [2021-06-05 06:57:29,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:29,503 INFO L225 Difference]: With dead ends: 404 [2021-06-05 06:57:29,503 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 06:57:29,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 369.9ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:57:29,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 06:57:29,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 175. [2021-06-05 06:57:29,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2011494252873565) internal successors, (383), 174 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 383 transitions. [2021-06-05 06:57:29,508 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 383 transitions. Word has length 25 [2021-06-05 06:57:29,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:29,508 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 383 transitions. [2021-06-05 06:57:29,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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) [2021-06-05 06:57:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 383 transitions. [2021-06-05 06:57:29,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 06:57:29,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:29,509 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:29,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 06:57:29,717 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:29,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:29,717 INFO L82 PathProgramCache]: Analyzing trace with hash 465222687, now seen corresponding path program 9 times [2021-06-05 06:57:29,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:29,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349288358] [2021-06-05 06:57:29,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:29,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:29,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349288358] [2021-06-05 06:57:29,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349288358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:29,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449269614] [2021-06-05 06:57:29,759 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:29,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:57:29,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:29,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:57:29,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:29,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449269614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:29,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:29,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-06-05 06:57:29,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925101110] [2021-06-05 06:57:29,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:57:29,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:29,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:57:29,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:57:29,939 INFO L87 Difference]: Start difference. First operand 175 states and 383 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) [2021-06-05 06:57:30,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:30,473 INFO L93 Difference]: Finished difference Result 308 states and 630 transitions. [2021-06-05 06:57:30,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:57:30,481 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 [2021-06-05 06:57:30,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:30,482 INFO L225 Difference]: With dead ends: 308 [2021-06-05 06:57:30,482 INFO L226 Difference]: Without dead ends: 306 [2021-06-05 06:57:30,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 480.1ms TimeCoverageRelationStatistics Valid=493, Invalid=1399, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:57:30,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-06-05 06:57:30,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 175. [2021-06-05 06:57:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1954022988505746) internal successors, (382), 174 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:30,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 382 transitions. [2021-06-05 06:57:30,487 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 382 transitions. Word has length 25 [2021-06-05 06:57:30,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:30,487 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 382 transitions. [2021-06-05 06:57:30,487 INFO L483 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) [2021-06-05 06:57:30,487 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 382 transitions. [2021-06-05 06:57:30,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:57:30,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:30,488 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:30,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:30,703 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:30,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:30,704 INFO L82 PathProgramCache]: Analyzing trace with hash -2001868057, now seen corresponding path program 10 times [2021-06-05 06:57:30,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:30,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427084333] [2021-06-05 06:57:30,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:30,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:30,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427084333] [2021-06-05 06:57:30,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427084333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:30,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854857993] [2021-06-05 06:57:30,849 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:30,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:57:30,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:30,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:57:30,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:31,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854857993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:31,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:31,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:57:31,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310659113] [2021-06-05 06:57:31,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:57:31,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:31,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:57:31,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:57:31,270 INFO L87 Difference]: Start difference. First operand 175 states and 382 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:32,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:32,084 INFO L93 Difference]: Finished difference Result 609 states and 1253 transitions. [2021-06-05 06:57:32,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:57:32,084 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:57:32,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:32,088 INFO L225 Difference]: With dead ends: 609 [2021-06-05 06:57:32,088 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 06:57:32,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 830.7ms TimeCoverageRelationStatistics Valid=364, Invalid=1892, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:57:32,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 06:57:32,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 229. [2021-06-05 06:57:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.219298245614035) internal successors, (506), 228 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:32,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 506 transitions. [2021-06-05 06:57:32,096 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 506 transitions. Word has length 27 [2021-06-05 06:57:32,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:32,096 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 506 transitions. [2021-06-05 06:57:32,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:32,096 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 506 transitions. [2021-06-05 06:57:32,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:57:32,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:32,097 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:32,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 06:57:32,305 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:32,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:32,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1752108615, now seen corresponding path program 11 times [2021-06-05 06:57:32,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:32,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132888228] [2021-06-05 06:57:32,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:32,504 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:32,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:32,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132888228] [2021-06-05 06:57:32,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132888228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:32,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065301871] [2021-06-05 06:57:32,505 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:32,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:57:32,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:32,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:57:32,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:32,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065301871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:32,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:32,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:57:32,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76389864] [2021-06-05 06:57:32,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:57:32,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:32,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:57:32,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:57:32,883 INFO L87 Difference]: Start difference. First operand 229 states and 506 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:33,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:33,769 INFO L93 Difference]: Finished difference Result 588 states and 1219 transitions. [2021-06-05 06:57:33,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:57:33,769 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:57:33,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:33,771 INFO L225 Difference]: With dead ends: 588 [2021-06-05 06:57:33,771 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 06:57:33,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 872.0ms TimeCoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:57:33,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 06:57:33,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 248. [2021-06-05 06:57:33,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.210526315789474) internal successors, (546), 247 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) [2021-06-05 06:57:33,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 546 transitions. [2021-06-05 06:57:33,777 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 546 transitions. Word has length 27 [2021-06-05 06:57:33,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:33,777 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 546 transitions. [2021-06-05 06:57:33,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:33,777 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 546 transitions. [2021-06-05 06:57:33,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:57:33,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:33,778 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:33,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 06:57:33,985 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:33,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:33,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1644513465, now seen corresponding path program 12 times [2021-06-05 06:57:33,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:33,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656317910] [2021-06-05 06:57:33,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:34,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:34,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656317910] [2021-06-05 06:57:34,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656317910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:34,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862189358] [2021-06-05 06:57:34,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:34,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:57:34,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:34,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:57:34,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:34,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862189358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:34,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:34,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:57:34,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054521458] [2021-06-05 06:57:34,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:57:34,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:34,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:57:34,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:57:34,515 INFO L87 Difference]: Start difference. First operand 248 states and 546 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:35,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:35,541 INFO L93 Difference]: Finished difference Result 592 states and 1236 transitions. [2021-06-05 06:57:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:57:35,542 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:57:35,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:35,544 INFO L225 Difference]: With dead ends: 592 [2021-06-05 06:57:35,544 INFO L226 Difference]: Without dead ends: 559 [2021-06-05 06:57:35,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 945.4ms TimeCoverageRelationStatistics Valid=425, Invalid=2125, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:57:35,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-05 06:57:35,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 272. [2021-06-05 06:57:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.206642066420664) internal successors, (598), 271 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:35,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 598 transitions. [2021-06-05 06:57:35,555 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 598 transitions. Word has length 27 [2021-06-05 06:57:35,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:35,555 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 598 transitions. [2021-06-05 06:57:35,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:35,556 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 598 transitions. [2021-06-05 06:57:35,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:57:35,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:35,556 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:35,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:35,772 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:35,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:35,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1281656179, now seen corresponding path program 13 times [2021-06-05 06:57:35,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:35,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207816898] [2021-06-05 06:57:35,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:35,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:35,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207816898] [2021-06-05 06:57:35,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207816898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:35,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731451927] [2021-06-05 06:57:35,972 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:35,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:57:35,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:36,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731451927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:36,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:36,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:57:36,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644672543] [2021-06-05 06:57:36,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:57:36,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:36,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:57:36,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:57:36,413 INFO L87 Difference]: Start difference. First operand 272 states and 598 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:37,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:37,669 INFO L93 Difference]: Finished difference Result 679 states and 1420 transitions. [2021-06-05 06:57:37,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:57:37,670 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:57:37,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:37,671 INFO L225 Difference]: With dead ends: 679 [2021-06-05 06:57:37,672 INFO L226 Difference]: Without dead ends: 616 [2021-06-05 06:57:37,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1277.9ms TimeCoverageRelationStatistics Valid=435, Invalid=2427, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:57:37,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-05 06:57:37,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 280. [2021-06-05 06:57:37,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.2007168458781363) internal successors, (614), 279 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:37,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 614 transitions. [2021-06-05 06:57:37,678 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 614 transitions. Word has length 27 [2021-06-05 06:57:37,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:37,678 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 614 transitions. [2021-06-05 06:57:37,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:37,678 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 614 transitions. [2021-06-05 06:57:37,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:57:37,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:37,679 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:37,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 06:57:37,895 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:37,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:37,895 INFO L82 PathProgramCache]: Analyzing trace with hash 383310963, now seen corresponding path program 14 times [2021-06-05 06:57:37,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:37,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106285284] [2021-06-05 06:57:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:38,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:38,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106285284] [2021-06-05 06:57:38,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106285284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:38,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64987780] [2021-06-05 06:57:38,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:38,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:57:38,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:38,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:57:38,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:38,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64987780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:38,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:38,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:57:38,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603951166] [2021-06-05 06:57:38,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:57:38,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:38,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:57:38,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:57:38,456 INFO L87 Difference]: Start difference. First operand 280 states and 614 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:40,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:40,104 INFO L93 Difference]: Finished difference Result 744 states and 1546 transitions. [2021-06-05 06:57:40,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:57:40,104 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:57:40,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:40,106 INFO L225 Difference]: With dead ends: 744 [2021-06-05 06:57:40,106 INFO L226 Difference]: Without dead ends: 704 [2021-06-05 06:57:40,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1560.0ms TimeCoverageRelationStatistics Valid=710, Invalid=3322, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:57:40,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-06-05 06:57:40,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 291. [2021-06-05 06:57:40,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.2103448275862068) internal successors, (641), 290 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:40,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 641 transitions. [2021-06-05 06:57:40,114 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 641 transitions. Word has length 27 [2021-06-05 06:57:40,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:40,114 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 641 transitions. [2021-06-05 06:57:40,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:40,114 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 641 transitions. [2021-06-05 06:57:40,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:57:40,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:40,115 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:40,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:40,329 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:40,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:40,329 INFO L82 PathProgramCache]: Analyzing trace with hash 113919671, now seen corresponding path program 15 times [2021-06-05 06:57:40,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:40,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310736431] [2021-06-05 06:57:40,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:40,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:40,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310736431] [2021-06-05 06:57:40,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310736431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:40,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529854031] [2021-06-05 06:57:40,437 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:40,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:57:40,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:40,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:57:40,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:40,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529854031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:40,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:40,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 06:57:40,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237398770] [2021-06-05 06:57:40,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:57:40,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:40,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:57:40,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:57:40,678 INFO L87 Difference]: Start difference. First operand 291 states and 641 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:41,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:41,487 INFO L93 Difference]: Finished difference Result 662 states and 1432 transitions. [2021-06-05 06:57:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:57:41,487 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:57:41,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:41,489 INFO L225 Difference]: With dead ends: 662 [2021-06-05 06:57:41,489 INFO L226 Difference]: Without dead ends: 662 [2021-06-05 06:57:41,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 761.4ms TimeCoverageRelationStatistics Valid=438, Invalid=1632, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:57:41,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-06-05 06:57:41,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 340. [2021-06-05 06:57:41,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.2359882005899707) internal successors, (758), 339 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:41,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 758 transitions. [2021-06-05 06:57:41,496 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 758 transitions. Word has length 27 [2021-06-05 06:57:41,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:41,496 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 758 transitions. [2021-06-05 06:57:41,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:41,496 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 758 transitions. [2021-06-05 06:57:41,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:57:41,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:41,497 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:41,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:41,713 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:41,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:41,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1553365309, now seen corresponding path program 16 times [2021-06-05 06:57:41,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:41,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050764482] [2021-06-05 06:57:41,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:41,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:41,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050764482] [2021-06-05 06:57:41,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050764482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:41,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133139874] [2021-06-05 06:57:41,897 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:41,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:57:41,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:41,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:57:41,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:42,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133139874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:42,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:42,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 06:57:42,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941629210] [2021-06-05 06:57:42,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:57:42,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:42,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:57:42,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:57:42,310 INFO L87 Difference]: Start difference. First operand 340 states and 758 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:44,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:44,290 INFO L93 Difference]: Finished difference Result 1105 states and 2323 transitions. [2021-06-05 06:57:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:57:44,291 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:57:44,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:44,293 INFO L225 Difference]: With dead ends: 1105 [2021-06-05 06:57:44,293 INFO L226 Difference]: Without dead ends: 1038 [2021-06-05 06:57:44,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 1798.8ms TimeCoverageRelationStatistics Valid=688, Invalid=4424, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 06:57:44,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-06-05 06:57:44,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 406. [2021-06-05 06:57:44,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.3061728395061727) internal successors, (934), 405 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:44,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 934 transitions. [2021-06-05 06:57:44,304 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 934 transitions. Word has length 27 [2021-06-05 06:57:44,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:44,305 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 934 transitions. [2021-06-05 06:57:44,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:44,305 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 934 transitions. [2021-06-05 06:57:44,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:57:44,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:44,306 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:44,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:44,509 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:44,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:44,509 INFO L82 PathProgramCache]: Analyzing trace with hash -525801667, now seen corresponding path program 17 times [2021-06-05 06:57:44,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:44,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358318502] [2021-06-05 06:57:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:44,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:44,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358318502] [2021-06-05 06:57:44,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358318502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:44,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785708356] [2021-06-05 06:57:44,600 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:44,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:57:44,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:44,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 06:57:44,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:44,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785708356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:44,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:44,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 06:57:44,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461410560] [2021-06-05 06:57:44,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:57:44,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:44,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:57:44,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:57:44,872 INFO L87 Difference]: Start difference. First operand 406 states and 934 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:45,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:45,869 INFO L93 Difference]: Finished difference Result 820 states and 1742 transitions. [2021-06-05 06:57:45,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:57:45,869 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:57:45,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:45,871 INFO L225 Difference]: With dead ends: 820 [2021-06-05 06:57:45,871 INFO L226 Difference]: Without dead ends: 793 [2021-06-05 06:57:45,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 936.0ms TimeCoverageRelationStatistics Valid=547, Invalid=2003, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:57:45,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-06-05 06:57:45,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 370. [2021-06-05 06:57:45,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.2086720867208673) internal successors, (815), 369 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 815 transitions. [2021-06-05 06:57:45,879 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 815 transitions. Word has length 27 [2021-06-05 06:57:45,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:45,879 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 815 transitions. [2021-06-05 06:57:45,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:45,879 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 815 transitions. [2021-06-05 06:57:45,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:57:45,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:45,880 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:46,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 06:57:46,098 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:46,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:46,098 INFO L82 PathProgramCache]: Analyzing trace with hash -879273425, now seen corresponding path program 18 times [2021-06-05 06:57:46,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:46,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986377599] [2021-06-05 06:57:46,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:46,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:46,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986377599] [2021-06-05 06:57:46,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986377599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:46,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497563761] [2021-06-05 06:57:46,145 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:57:46,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:57:46,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:46,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 06:57:46,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:46,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497563761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:46,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:46,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-06-05 06:57:46,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696445271] [2021-06-05 06:57:46,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:57:46,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:46,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:57:46,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:57:46,351 INFO L87 Difference]: Start difference. First operand 370 states and 815 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2021-06-05 06:57:46,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:46,928 INFO L93 Difference]: Finished difference Result 790 states and 1683 transitions. [2021-06-05 06:57:46,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:57:46,928 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 27 [2021-06-05 06:57:46,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:46,930 INFO L225 Difference]: With dead ends: 790 [2021-06-05 06:57:46,930 INFO L226 Difference]: Without dead ends: 786 [2021-06-05 06:57:46,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 552.8ms TimeCoverageRelationStatistics Valid=534, Invalid=1818, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:57:46,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-06-05 06:57:46,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 458. [2021-06-05 06:57:46,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.2603938730853392) internal successors, (1033), 457 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:46,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1033 transitions. [2021-06-05 06:57:46,939 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1033 transitions. Word has length 27 [2021-06-05 06:57:46,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:46,939 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1033 transitions. [2021-06-05 06:57:46,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2021-06-05 06:57:46,939 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1033 transitions. [2021-06-05 06:57:46,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:57:46,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:46,940 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:47,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 06:57:47,156 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:47,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:47,156 INFO L82 PathProgramCache]: Analyzing trace with hash -335260507, now seen corresponding path program 19 times [2021-06-05 06:57:47,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:47,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384441760] [2021-06-05 06:57:47,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:47,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:47,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384441760] [2021-06-05 06:57:47,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384441760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:47,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569435089] [2021-06-05 06:57:47,232 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:47,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:57:47,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:47,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569435089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:47,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:47,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 06:57:47,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214902409] [2021-06-05 06:57:47,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:57:47,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:47,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:57:47,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:57:47,510 INFO L87 Difference]: Start difference. First operand 458 states and 1033 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:48,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:48,257 INFO L93 Difference]: Finished difference Result 890 states and 1856 transitions. [2021-06-05 06:57:48,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:57:48,257 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:57:48,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:48,259 INFO L225 Difference]: With dead ends: 890 [2021-06-05 06:57:48,259 INFO L226 Difference]: Without dead ends: 890 [2021-06-05 06:57:48,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 698.4ms TimeCoverageRelationStatistics Valid=775, Invalid=2417, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:57:48,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-06-05 06:57:48,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 490. [2021-06-05 06:57:48,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.276073619631902) internal successors, (1113), 489 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:48,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1113 transitions. [2021-06-05 06:57:48,267 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1113 transitions. Word has length 29 [2021-06-05 06:57:48,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:48,268 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1113 transitions. [2021-06-05 06:57:48,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:48,268 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1113 transitions. [2021-06-05 06:57:48,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:57:48,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:48,269 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:48,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:48,485 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:48,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:48,486 INFO L82 PathProgramCache]: Analyzing trace with hash -2063984225, now seen corresponding path program 20 times [2021-06-05 06:57:48,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:48,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617450550] [2021-06-05 06:57:48,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:48,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:48,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617450550] [2021-06-05 06:57:48,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617450550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:48,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044165089] [2021-06-05 06:57:48,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:48,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:57:48,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:48,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:57:48,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:48,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044165089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:48,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:48,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-06-05 06:57:48,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638628073] [2021-06-05 06:57:48,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:57:48,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:48,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:57:48,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:57:48,753 INFO L87 Difference]: Start difference. First operand 490 states and 1113 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:49,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:49,697 INFO L93 Difference]: Finished difference Result 726 states and 1556 transitions. [2021-06-05 06:57:49,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:57:49,698 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:57:49,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:49,699 INFO L225 Difference]: With dead ends: 726 [2021-06-05 06:57:49,699 INFO L226 Difference]: Without dead ends: 722 [2021-06-05 06:57:49,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 882.6ms TimeCoverageRelationStatistics Valid=1000, Invalid=3032, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:57:49,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-06-05 06:57:49,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 458. [2021-06-05 06:57:49,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.25382932166302) internal successors, (1030), 457 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:49,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1030 transitions. [2021-06-05 06:57:49,706 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1030 transitions. Word has length 29 [2021-06-05 06:57:49,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:49,707 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1030 transitions. [2021-06-05 06:57:49,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:49,707 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1030 transitions. [2021-06-05 06:57:49,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:57:49,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:49,707 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:49,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 06:57:49,921 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:49,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:49,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2078249141, now seen corresponding path program 21 times [2021-06-05 06:57:49,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:49,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813698385] [2021-06-05 06:57:49,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:50,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:50,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813698385] [2021-06-05 06:57:50,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813698385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:50,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367292308] [2021-06-05 06:57:50,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:50,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:57:50,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:50,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:57:50,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:50,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367292308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:50,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:50,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-05 06:57:50,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702882179] [2021-06-05 06:57:50,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:57:50,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:50,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:57:50,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:57:50,409 INFO L87 Difference]: Start difference. First operand 458 states and 1030 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:51,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:51,999 INFO L93 Difference]: Finished difference Result 705 states and 1525 transitions. [2021-06-05 06:57:51,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:57:51,999 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:57:51,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:52,001 INFO L225 Difference]: With dead ends: 705 [2021-06-05 06:57:52,001 INFO L226 Difference]: Without dead ends: 684 [2021-06-05 06:57:52,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1541.8ms TimeCoverageRelationStatistics Valid=434, Invalid=3598, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:57:52,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-06-05 06:57:52,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 473. [2021-06-05 06:57:52,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.264830508474576) internal successors, (1069), 472 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:52,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1069 transitions. [2021-06-05 06:57:52,008 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1069 transitions. Word has length 29 [2021-06-05 06:57:52,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:52,008 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1069 transitions. [2021-06-05 06:57:52,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:52,008 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1069 transitions. [2021-06-05 06:57:52,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:57:52,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:52,009 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:52,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:52,224 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:52,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1384293639, now seen corresponding path program 22 times [2021-06-05 06:57:52,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:52,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847064536] [2021-06-05 06:57:52,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:52,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:52,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847064536] [2021-06-05 06:57:52,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847064536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:52,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614861755] [2021-06-05 06:57:52,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:52,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:57:52,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:52,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 06:57:52,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:52,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614861755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:52,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:52,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 06:57:52,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891999292] [2021-06-05 06:57:52,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:57:52,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:52,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:57:52,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:57:52,910 INFO L87 Difference]: Start difference. First operand 473 states and 1069 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:54,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:54,576 INFO L93 Difference]: Finished difference Result 761 states and 1640 transitions. [2021-06-05 06:57:54,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:57:54,577 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:57:54,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:54,579 INFO L225 Difference]: With dead ends: 761 [2021-06-05 06:57:54,579 INFO L226 Difference]: Without dead ends: 749 [2021-06-05 06:57:54,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1593.8ms TimeCoverageRelationStatistics Valid=354, Invalid=3186, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:57:54,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-06-05 06:57:54,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 517. [2021-06-05 06:57:54,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.294573643410853) internal successors, (1184), 516 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:54,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1184 transitions. [2021-06-05 06:57:54,586 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1184 transitions. Word has length 29 [2021-06-05 06:57:54,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:54,587 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1184 transitions. [2021-06-05 06:57:54,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:54,587 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1184 transitions. [2021-06-05 06:57:54,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:57:54,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:54,588 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:54,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:54,804 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:54,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:54,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1179903925, now seen corresponding path program 23 times [2021-06-05 06:57:54,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:54,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485294295] [2021-06-05 06:57:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:54,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:54,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485294295] [2021-06-05 06:57:54,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485294295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:54,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153350527] [2021-06-05 06:57:54,947 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:54,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:57:54,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:54,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 06:57:54,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:55,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153350527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:55,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:55,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-05 06:57:55,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540747824] [2021-06-05 06:57:55,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:57:55,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:55,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:57:55,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:57:55,357 INFO L87 Difference]: Start difference. First operand 517 states and 1184 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:56,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:56,995 INFO L93 Difference]: Finished difference Result 1009 states and 2157 transitions. [2021-06-05 06:57:56,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:57:56,995 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:57:56,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:56,998 INFO L225 Difference]: With dead ends: 1009 [2021-06-05 06:57:56,998 INFO L226 Difference]: Without dead ends: 975 [2021-06-05 06:57:56,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1503.8ms TimeCoverageRelationStatistics Valid=640, Invalid=3142, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:57:56,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-06-05 06:57:57,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 489. [2021-06-05 06:57:57,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.2684426229508197) internal successors, (1107), 488 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:57,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1107 transitions. [2021-06-05 06:57:57,006 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1107 transitions. Word has length 29 [2021-06-05 06:57:57,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:57,006 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1107 transitions. [2021-06-05 06:57:57,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:57,006 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1107 transitions. [2021-06-05 06:57:57,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:57:57,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:57,007 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:57,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:57,220 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:57,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:57,221 INFO L82 PathProgramCache]: Analyzing trace with hash -985517533, now seen corresponding path program 24 times [2021-06-05 06:57:57,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:57,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217613222] [2021-06-05 06:57:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:57,405 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:57,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:57,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217613222] [2021-06-05 06:57:57,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217613222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:57,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135443401] [2021-06-05 06:57:57,405 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:57,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:57:57,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:57,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:57:57,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:57,901 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:57,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135443401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:57,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:57,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-05 06:57:57,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674190931] [2021-06-05 06:57:57,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:57:57,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:57,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:57:57,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:57:57,903 INFO L87 Difference]: Start difference. First operand 489 states and 1107 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:59,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:59,054 INFO L93 Difference]: Finished difference Result 1174 states and 2556 transitions. [2021-06-05 06:57:59,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:57:59,054 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:57:59,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:59,057 INFO L225 Difference]: With dead ends: 1174 [2021-06-05 06:57:59,057 INFO L226 Difference]: Without dead ends: 1105 [2021-06-05 06:57:59,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1137.1ms TimeCoverageRelationStatistics Valid=495, Invalid=2811, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:57:59,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-06-05 06:57:59,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 560. [2021-06-05 06:57:59,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 559 states have (on average 2.2772808586762077) internal successors, (1273), 559 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:59,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 1273 transitions. [2021-06-05 06:57:59,066 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 1273 transitions. Word has length 31 [2021-06-05 06:57:59,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:59,066 INFO L482 AbstractCegarLoop]: Abstraction has 560 states and 1273 transitions. [2021-06-05 06:57:59,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:59,066 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 1273 transitions. [2021-06-05 06:57:59,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:57:59,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:59,067 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:59,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:59,281 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:59,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:59,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1484862347, now seen corresponding path program 25 times [2021-06-05 06:57:59,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:59,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382505972] [2021-06-05 06:57:59,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:59,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:59,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:59,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382505972] [2021-06-05 06:57:59,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382505972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:59,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687697588] [2021-06-05 06:57:59,492 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:59,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:57:59,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:59,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687697588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:59,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:59,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-05 06:57:59,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947451899] [2021-06-05 06:57:59,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:57:59,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:59,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:57:59,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:57:59,966 INFO L87 Difference]: Start difference. First operand 560 states and 1273 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:01,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:01,012 INFO L93 Difference]: Finished difference Result 1108 states and 2432 transitions. [2021-06-05 06:58:01,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:58:01,012 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:58:01,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:01,015 INFO L225 Difference]: With dead ends: 1108 [2021-06-05 06:58:01,015 INFO L226 Difference]: Without dead ends: 1051 [2021-06-05 06:58:01,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1134.1ms TimeCoverageRelationStatistics Valid=432, Invalid=2538, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:58:01,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-06-05 06:58:01,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 584. [2021-06-05 06:58:01,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 2.2658662092624358) internal successors, (1321), 583 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:01,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1321 transitions. [2021-06-05 06:58:01,023 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1321 transitions. Word has length 31 [2021-06-05 06:58:01,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:01,023 INFO L482 AbstractCegarLoop]: Abstraction has 584 states and 1321 transitions. [2021-06-05 06:58:01,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:01,023 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1321 transitions. [2021-06-05 06:58:01,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:58:01,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:01,024 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:01,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 06:58:01,238 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:01,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:01,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1890433653, now seen corresponding path program 26 times [2021-06-05 06:58:01,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:01,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394499703] [2021-06-05 06:58:01,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:01,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:01,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394499703] [2021-06-05 06:58:01,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394499703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:01,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497280625] [2021-06-05 06:58:01,405 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:01,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:01,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:01,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:01,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:01,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497280625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:01,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:01,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-05 06:58:01,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968809812] [2021-06-05 06:58:01,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:58:01,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:01,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:58:01,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:58:01,913 INFO L87 Difference]: Start difference. First operand 584 states and 1321 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:03,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:03,373 INFO L93 Difference]: Finished difference Result 1217 states and 2662 transitions. [2021-06-05 06:58:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:58:03,373 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:58:03,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:03,376 INFO L225 Difference]: With dead ends: 1217 [2021-06-05 06:58:03,376 INFO L226 Difference]: Without dead ends: 1175 [2021-06-05 06:58:03,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1474.5ms TimeCoverageRelationStatistics Valid=672, Invalid=3618, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 06:58:03,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-06-05 06:58:03,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 651. [2021-06-05 06:58:03,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 2.272307692307692) internal successors, (1477), 650 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:03,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1477 transitions. [2021-06-05 06:58:03,403 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1477 transitions. Word has length 31 [2021-06-05 06:58:03,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:03,403 INFO L482 AbstractCegarLoop]: Abstraction has 651 states and 1477 transitions. [2021-06-05 06:58:03,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:03,403 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1477 transitions. [2021-06-05 06:58:03,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:58:03,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:03,404 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:03,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:03,625 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:03,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:03,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1975277999, now seen corresponding path program 27 times [2021-06-05 06:58:03,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:03,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993534594] [2021-06-05 06:58:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:03,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:03,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993534594] [2021-06-05 06:58:03,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993534594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:03,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798998171] [2021-06-05 06:58:03,828 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:03,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:58:03,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:03,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:03,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:04,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798998171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:04,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:04,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-05 06:58:04,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235207446] [2021-06-05 06:58:04,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:58:04,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:04,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:58:04,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:58:04,287 INFO L87 Difference]: Start difference. First operand 651 states and 1477 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:05,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:05,734 INFO L93 Difference]: Finished difference Result 1268 states and 2780 transitions. [2021-06-05 06:58:05,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:58:05,734 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:58:05,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:05,737 INFO L225 Difference]: With dead ends: 1268 [2021-06-05 06:58:05,737 INFO L226 Difference]: Without dead ends: 1199 [2021-06-05 06:58:05,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1451.7ms TimeCoverageRelationStatistics Valid=518, Invalid=3022, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:58:05,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-06-05 06:58:05,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 655. [2021-06-05 06:58:05,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.270642201834862) internal successors, (1485), 654 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:05,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1485 transitions. [2021-06-05 06:58:05,746 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1485 transitions. Word has length 31 [2021-06-05 06:58:05,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:05,746 INFO L482 AbstractCegarLoop]: Abstraction has 655 states and 1485 transitions. [2021-06-05 06:58:05,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:05,747 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1485 transitions. [2021-06-05 06:58:05,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:58:05,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:05,748 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:05,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 06:58:05,958 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:05,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:05,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1055606703, now seen corresponding path program 28 times [2021-06-05 06:58:05,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:05,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620221716] [2021-06-05 06:58:05,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:06,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:06,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620221716] [2021-06-05 06:58:06,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620221716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:06,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306951338] [2021-06-05 06:58:06,133 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:06,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:06,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:06,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:06,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:06,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306951338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:06,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:06,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-05 06:58:06,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492517204] [2021-06-05 06:58:06,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:58:06,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:06,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:58:06,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:58:06,646 INFO L87 Difference]: Start difference. First operand 655 states and 1485 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:08,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:08,392 INFO L93 Difference]: Finished difference Result 1427 states and 3120 transitions. [2021-06-05 06:58:08,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:58:08,392 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:58:08,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:08,396 INFO L225 Difference]: With dead ends: 1427 [2021-06-05 06:58:08,396 INFO L226 Difference]: Without dead ends: 1385 [2021-06-05 06:58:08,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1778.1ms TimeCoverageRelationStatistics Valid=819, Invalid=4151, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 06:58:08,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-06-05 06:58:08,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 664. [2021-06-05 06:58:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 2.277526395173454) internal successors, (1510), 663 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:08,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1510 transitions. [2021-06-05 06:58:08,407 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1510 transitions. Word has length 31 [2021-06-05 06:58:08,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:08,407 INFO L482 AbstractCegarLoop]: Abstraction has 664 states and 1510 transitions. [2021-06-05 06:58:08,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:08,407 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1510 transitions. [2021-06-05 06:58:08,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:58:08,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:08,408 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:08,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:08,625 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:08,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:08,625 INFO L82 PathProgramCache]: Analyzing trace with hash 766958067, now seen corresponding path program 29 times [2021-06-05 06:58:08,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:08,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101522748] [2021-06-05 06:58:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:08,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:08,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101522748] [2021-06-05 06:58:08,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101522748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:08,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037591947] [2021-06-05 06:58:08,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:08,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:58:08,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:08,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:08,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:09,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037591947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:09,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:09,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-05 06:58:09,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336521569] [2021-06-05 06:58:09,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:58:09,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:09,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:58:09,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:58:09,301 INFO L87 Difference]: Start difference. First operand 664 states and 1510 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:11,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:11,920 INFO L93 Difference]: Finished difference Result 1966 states and 4209 transitions. [2021-06-05 06:58:11,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:58:11,921 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:58:11,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:11,934 INFO L225 Difference]: With dead ends: 1966 [2021-06-05 06:58:11,934 INFO L226 Difference]: Without dead ends: 1908 [2021-06-05 06:58:11,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2733 ImplicationChecksByTransitivity, 2482.5ms TimeCoverageRelationStatistics Valid=1278, Invalid=6912, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 06:58:11,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-06-05 06:58:11,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 774. [2021-06-05 06:58:11,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.2923673997412677) internal successors, (1772), 773 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:11,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1772 transitions. [2021-06-05 06:58:11,947 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1772 transitions. Word has length 31 [2021-06-05 06:58:11,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:11,947 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1772 transitions. [2021-06-05 06:58:11,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:11,947 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1772 transitions. [2021-06-05 06:58:11,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:58:11,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:11,948 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:12,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 06:58:12,161 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:12,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:12,161 INFO L82 PathProgramCache]: Analyzing trace with hash 497566775, now seen corresponding path program 30 times [2021-06-05 06:58:12,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:12,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635619026] [2021-06-05 06:58:12,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:12,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:12,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635619026] [2021-06-05 06:58:12,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635619026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:12,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78690927] [2021-06-05 06:58:12,292 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:12,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:58:12,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:12,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:58:12,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:12,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78690927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:12,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:12,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 06:58:12,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458161344] [2021-06-05 06:58:12,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:58:12,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:12,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:58:12,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:58:12,719 INFO L87 Difference]: Start difference. First operand 774 states and 1772 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:13,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:13,975 INFO L93 Difference]: Finished difference Result 1633 states and 3659 transitions. [2021-06-05 06:58:13,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:58:13,976 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:58:13,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:13,978 INFO L225 Difference]: With dead ends: 1633 [2021-06-05 06:58:13,978 INFO L226 Difference]: Without dead ends: 1633 [2021-06-05 06:58:13,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1290.4ms TimeCoverageRelationStatistics Valid=646, Invalid=2660, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:58:13,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2021-06-05 06:58:13,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 814. [2021-06-05 06:58:13,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 2.2976629766297663) internal successors, (1868), 813 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1868 transitions. [2021-06-05 06:58:13,997 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1868 transitions. Word has length 31 [2021-06-05 06:58:13,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:13,997 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 1868 transitions. [2021-06-05 06:58:13,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:13,997 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1868 transitions. [2021-06-05 06:58:13,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:58:13,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:13,998 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:14,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:14,214 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:14,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:14,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1094746873, now seen corresponding path program 31 times [2021-06-05 06:58:14,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:14,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136039762] [2021-06-05 06:58:14,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:14,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:14,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136039762] [2021-06-05 06:58:14,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136039762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:14,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262476301] [2021-06-05 06:58:14,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:14,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:58:14,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:14,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262476301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:14,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:14,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 06:58:14,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906812161] [2021-06-05 06:58:14,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:58:14,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:14,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:58:14,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:58:14,713 INFO L87 Difference]: Start difference. First operand 814 states and 1868 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:17,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:17,690 INFO L93 Difference]: Finished difference Result 1582 states and 3436 transitions. [2021-06-05 06:58:17,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 06:58:17,691 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:58:17,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:17,693 INFO L225 Difference]: With dead ends: 1582 [2021-06-05 06:58:17,693 INFO L226 Difference]: Without dead ends: 1525 [2021-06-05 06:58:17,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 2607.3ms TimeCoverageRelationStatistics Valid=908, Invalid=7464, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 06:58:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2021-06-05 06:58:17,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 860. [2021-06-05 06:58:17,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 2.2980209545983703) internal successors, (1974), 859 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:17,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1974 transitions. [2021-06-05 06:58:17,705 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1974 transitions. Word has length 31 [2021-06-05 06:58:17,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:17,705 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 1974 transitions. [2021-06-05 06:58:17,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:17,705 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1974 transitions. [2021-06-05 06:58:17,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:58:17,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:17,707 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:17,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:17,922 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:17,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:17,922 INFO L82 PathProgramCache]: Analyzing trace with hash 175075577, now seen corresponding path program 32 times [2021-06-05 06:58:17,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:17,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669422131] [2021-06-05 06:58:17,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:18,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:18,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669422131] [2021-06-05 06:58:18,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669422131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:18,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134159651] [2021-06-05 06:58:18,101 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:18,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:18,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:18,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:18,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:18,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134159651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:18,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:18,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-05 06:58:18,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980963043] [2021-06-05 06:58:18,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:58:18,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:18,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:58:18,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:58:18,610 INFO L87 Difference]: Start difference. First operand 860 states and 1974 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:21,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:21,775 INFO L93 Difference]: Finished difference Result 1889 states and 4109 transitions. [2021-06-05 06:58:21,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:58:21,775 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:58:21,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:21,778 INFO L225 Difference]: With dead ends: 1889 [2021-06-05 06:58:21,778 INFO L226 Difference]: Without dead ends: 1838 [2021-06-05 06:58:21,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3198 ImplicationChecksByTransitivity, 3041.4ms TimeCoverageRelationStatistics Valid=1421, Invalid=7891, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 06:58:21,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2021-06-05 06:58:21,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 929. [2021-06-05 06:58:21,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 2.3168103448275863) internal successors, (2150), 928 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:21,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 2150 transitions. [2021-06-05 06:58:21,791 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 2150 transitions. Word has length 31 [2021-06-05 06:58:21,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:21,791 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 2150 transitions. [2021-06-05 06:58:21,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:21,791 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 2150 transitions. [2021-06-05 06:58:21,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:58:21,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:21,792 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:21,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 06:58:21,993 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:21,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:21,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1294394819, now seen corresponding path program 33 times [2021-06-05 06:58:21,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:21,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950689987] [2021-06-05 06:58:21,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:22,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:22,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950689987] [2021-06-05 06:58:22,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950689987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:22,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676603343] [2021-06-05 06:58:22,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:22,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:58:22,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:22,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:58:22,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:22,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676603343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:22,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:22,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:58:22,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85343928] [2021-06-05 06:58:22,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:58:22,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:22,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:58:22,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:58:22,504 INFO L87 Difference]: Start difference. First operand 929 states and 2150 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:23,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:23,765 INFO L93 Difference]: Finished difference Result 1635 states and 3656 transitions. [2021-06-05 06:58:23,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:58:23,769 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:58:23,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:23,771 INFO L225 Difference]: With dead ends: 1635 [2021-06-05 06:58:23,771 INFO L226 Difference]: Without dead ends: 1635 [2021-06-05 06:58:23,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1223.6ms TimeCoverageRelationStatistics Valid=631, Invalid=2675, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:58:23,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-05 06:58:23,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 995. [2021-06-05 06:58:23,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 2.3158953722334004) internal successors, (2302), 994 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:23,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2302 transitions. [2021-06-05 06:58:23,784 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2302 transitions. Word has length 31 [2021-06-05 06:58:23,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:23,784 INFO L482 AbstractCegarLoop]: Abstraction has 995 states and 2302 transitions. [2021-06-05 06:58:23,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:23,784 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2302 transitions. [2021-06-05 06:58:23,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:58:23,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:23,785 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:23,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:23,989 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:23,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:23,989 INFO L82 PathProgramCache]: Analyzing trace with hash 797857409, now seen corresponding path program 34 times [2021-06-05 06:58:23,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:23,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289377842] [2021-06-05 06:58:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:24,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:24,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289377842] [2021-06-05 06:58:24,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289377842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:24,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30856643] [2021-06-05 06:58:24,163 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 [2021-06-05 06:58:24,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:24,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:24,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:24,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:24,616 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:24,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30856643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:24,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:24,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 06:58:24,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921065044] [2021-06-05 06:58:24,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:58:24,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:24,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:58:24,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:58:24,617 INFO L87 Difference]: Start difference. First operand 995 states and 2302 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:27,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:27,594 INFO L93 Difference]: Finished difference Result 2696 states and 5900 transitions. [2021-06-05 06:58:27,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 06:58:27,595 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:58:27,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:27,598 INFO L225 Difference]: With dead ends: 2696 [2021-06-05 06:58:27,598 INFO L226 Difference]: Without dead ends: 2642 [2021-06-05 06:58:27,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 2680.5ms TimeCoverageRelationStatistics Valid=1212, Invalid=6444, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 06:58:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-06-05 06:58:27,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 1189. [2021-06-05 06:58:27,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.3526936026936025) internal successors, (2795), 1188 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:27,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 2795 transitions. [2021-06-05 06:58:27,616 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 2795 transitions. Word has length 31 [2021-06-05 06:58:27,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:27,616 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 2795 transitions. [2021-06-05 06:58:27,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:27,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 2795 transitions. [2021-06-05 06:58:27,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:58:27,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:27,617 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:27,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 06:58:27,818 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:27,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:27,818 INFO L82 PathProgramCache]: Analyzing trace with hash 67491499, now seen corresponding path program 35 times [2021-06-05 06:58:27,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:27,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459697363] [2021-06-05 06:58:27,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:27,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:27,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459697363] [2021-06-05 06:58:27,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459697363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:27,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368273744] [2021-06-05 06:58:27,954 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 [2021-06-05 06:58:27,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 06:58:27,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:27,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:58:27,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:28,146 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:28,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368273744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:28,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:28,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-05 06:58:28,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061005505] [2021-06-05 06:58:28,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:58:28,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:28,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:58:28,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:58:28,147 INFO L87 Difference]: Start difference. First operand 1189 states and 2795 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:30,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:30,006 INFO L93 Difference]: Finished difference Result 2304 states and 5171 transitions. [2021-06-05 06:58:30,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 06:58:30,007 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:58:30,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:30,010 INFO L225 Difference]: With dead ends: 2304 [2021-06-05 06:58:30,010 INFO L226 Difference]: Without dead ends: 2208 [2021-06-05 06:58:30,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2449 ImplicationChecksByTransitivity, 1549.1ms TimeCoverageRelationStatistics Valid=1219, Invalid=6263, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 06:58:30,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-06-05 06:58:30,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 1478. [2021-06-05 06:58:30,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 2.360866621530129) internal successors, (3487), 1477 states have internal predecessors, (3487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:30,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 3487 transitions. [2021-06-05 06:58:30,028 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 3487 transitions. Word has length 31 [2021-06-05 06:58:30,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:30,028 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 3487 transitions. [2021-06-05 06:58:30,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:30,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 3487 transitions. [2021-06-05 06:58:30,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:58:30,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:30,030 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:30,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:30,245 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:30,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:30,245 INFO L82 PathProgramCache]: Analyzing trace with hash 735083257, now seen corresponding path program 36 times [2021-06-05 06:58:30,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:30,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153888615] [2021-06-05 06:58:30,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:30,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:30,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153888615] [2021-06-05 06:58:30,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153888615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:30,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189140984] [2021-06-05 06:58:30,419 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:30,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:58:30,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:30,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 06:58:30,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:30,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189140984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:30,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:30,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-05 06:58:30,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090033105] [2021-06-05 06:58:30,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:58:30,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:30,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:58:30,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:58:30,904 INFO L87 Difference]: Start difference. First operand 1478 states and 3487 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:32,992 INFO L93 Difference]: Finished difference Result 2856 states and 6422 transitions. [2021-06-05 06:58:32,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 06:58:32,992 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:58:32,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:32,995 INFO L225 Difference]: With dead ends: 2856 [2021-06-05 06:58:32,995 INFO L226 Difference]: Without dead ends: 2771 [2021-06-05 06:58:32,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 2040.4ms TimeCoverageRelationStatistics Valid=852, Invalid=5468, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 06:58:32,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2021-06-05 06:58:33,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 1636. [2021-06-05 06:58:33,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 2.3559633027522935) internal successors, (3852), 1635 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:33,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 3852 transitions. [2021-06-05 06:58:33,015 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 3852 transitions. Word has length 31 [2021-06-05 06:58:33,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:33,016 INFO L482 AbstractCegarLoop]: Abstraction has 1636 states and 3852 transitions. [2021-06-05 06:58:33,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:33,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 3852 transitions. [2021-06-05 06:58:33,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:58:33,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:33,017 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:33,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-05 06:58:33,233 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:33,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:33,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1903077501, now seen corresponding path program 37 times [2021-06-05 06:58:33,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:33,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251849931] [2021-06-05 06:58:33,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:33,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:33,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251849931] [2021-06-05 06:58:33,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251849931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:33,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542228271] [2021-06-05 06:58:33,432 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:33,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:33,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:33,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542228271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:33,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:33,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-05 06:58:33,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943399695] [2021-06-05 06:58:33,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:58:33,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:33,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:58:33,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:58:33,942 INFO L87 Difference]: Start difference. First operand 1636 states and 3852 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:37,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:37,596 INFO L93 Difference]: Finished difference Result 3900 states and 8693 transitions. [2021-06-05 06:58:37,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 06:58:37,596 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:58:37,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:37,602 INFO L225 Difference]: With dead ends: 3900 [2021-06-05 06:58:37,602 INFO L226 Difference]: Without dead ends: 3784 [2021-06-05 06:58:37,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4357 ImplicationChecksByTransitivity, 3298.3ms TimeCoverageRelationStatistics Valid=1538, Invalid=10452, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 06:58:37,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3784 states. [2021-06-05 06:58:37,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3784 to 1899. [2021-06-05 06:58:37,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 2.403582718651212) internal successors, (4562), 1898 states have internal predecessors, (4562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:37,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 4562 transitions. [2021-06-05 06:58:37,630 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 4562 transitions. Word has length 31 [2021-06-05 06:58:37,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:37,630 INFO L482 AbstractCegarLoop]: Abstraction has 1899 states and 4562 transitions. [2021-06-05 06:58:37,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:37,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 4562 transitions. [2021-06-05 06:58:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:58:37,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:37,632 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:37,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2021-06-05 06:58:37,848 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:37,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:37,848 INFO L82 PathProgramCache]: Analyzing trace with hash 983406205, now seen corresponding path program 38 times [2021-06-05 06:58:37,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:37,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290316648] [2021-06-05 06:58:37,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:38,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:38,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290316648] [2021-06-05 06:58:38,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290316648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:38,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49281043] [2021-06-05 06:58:38,036 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:38,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:38,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:38,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:58:38,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:38,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49281043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:38,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:38,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-05 06:58:38,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101918077] [2021-06-05 06:58:38,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:58:38,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:38,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:58:38,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:58:38,523 INFO L87 Difference]: Start difference. First operand 1899 states and 4562 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:41,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:41,668 INFO L93 Difference]: Finished difference Result 3505 states and 7977 transitions. [2021-06-05 06:58:41,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 06:58:41,669 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:58:41,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:41,673 INFO L225 Difference]: With dead ends: 3505 [2021-06-05 06:58:41,673 INFO L226 Difference]: Without dead ends: 3426 [2021-06-05 06:58:41,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2945 ImplicationChecksByTransitivity, 2919.1ms TimeCoverageRelationStatistics Valid=1212, Invalid=7530, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 06:58:41,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2021-06-05 06:58:41,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 1879. [2021-06-05 06:58:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 2.3998935037273696) internal successors, (4507), 1878 states have internal predecessors, (4507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:41,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 4507 transitions. [2021-06-05 06:58:41,698 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 4507 transitions. Word has length 31 [2021-06-05 06:58:41,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:41,698 INFO L482 AbstractCegarLoop]: Abstraction has 1879 states and 4507 transitions. [2021-06-05 06:58:41,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:41,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 4507 transitions. [2021-06-05 06:58:41,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:58:41,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:41,700 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:41,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 06:58:41,916 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:41,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:41,916 INFO L82 PathProgramCache]: Analyzing trace with hash -486064191, now seen corresponding path program 39 times [2021-06-05 06:58:41,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:41,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227950450] [2021-06-05 06:58:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:42,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:42,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227950450] [2021-06-05 06:58:42,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227950450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:42,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804920146] [2021-06-05 06:58:42,039 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:42,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:58:42,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:42,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:58:42,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:42,421 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:42,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804920146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:42,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:42,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:58:42,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226050700] [2021-06-05 06:58:42,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:58:42,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:42,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:58:42,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:58:42,422 INFO L87 Difference]: Start difference. First operand 1879 states and 4507 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:43,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:43,977 INFO L93 Difference]: Finished difference Result 3076 states and 7034 transitions. [2021-06-05 06:58:43,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:58:43,978 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:58:43,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:43,980 INFO L225 Difference]: With dead ends: 3076 [2021-06-05 06:58:43,980 INFO L226 Difference]: Without dead ends: 3052 [2021-06-05 06:58:43,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1475.4ms TimeCoverageRelationStatistics Valid=823, Invalid=3337, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 06:58:43,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-06-05 06:58:44,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 1766. [2021-06-05 06:58:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 2.3507082152974506) internal successors, (4149), 1765 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:44,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 4149 transitions. [2021-06-05 06:58:44,003 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 4149 transitions. Word has length 31 [2021-06-05 06:58:44,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:44,003 INFO L482 AbstractCegarLoop]: Abstraction has 1766 states and 4149 transitions. [2021-06-05 06:58:44,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:44,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 4149 transitions. [2021-06-05 06:58:44,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:58:44,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:44,005 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:44,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-05 06:58:44,221 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:44,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:44,221 INFO L82 PathProgramCache]: Analyzing trace with hash 2101275627, now seen corresponding path program 40 times [2021-06-05 06:58:44,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:44,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215444413] [2021-06-05 06:58:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:44,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:44,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215444413] [2021-06-05 06:58:44,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215444413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:44,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966040517] [2021-06-05 06:58:44,287 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:44,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:44,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:44,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:58:44,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:44,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966040517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:44,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:44,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 06:58:44,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747538840] [2021-06-05 06:58:44,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:58:44,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:44,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:58:44,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:58:44,560 INFO L87 Difference]: Start difference. First operand 1766 states and 4149 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:45,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:45,515 INFO L93 Difference]: Finished difference Result 2592 states and 5918 transitions. [2021-06-05 06:58:45,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:58:45,515 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:58:45,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:45,517 INFO L225 Difference]: With dead ends: 2592 [2021-06-05 06:58:45,517 INFO L226 Difference]: Without dead ends: 2588 [2021-06-05 06:58:45,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 847.1ms TimeCoverageRelationStatistics Valid=776, Invalid=3256, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:58:45,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-06-05 06:58:45,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1706. [2021-06-05 06:58:45,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1705 states have (on average 2.3530791788856305) internal successors, (4012), 1705 states have internal predecessors, (4012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:45,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 4012 transitions. [2021-06-05 06:58:45,539 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 4012 transitions. Word has length 31 [2021-06-05 06:58:45,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:45,539 INFO L482 AbstractCegarLoop]: Abstraction has 1706 states and 4012 transitions. [2021-06-05 06:58:45,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:45,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 4012 transitions. [2021-06-05 06:58:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 06:58:45,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:45,541 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:45,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable420,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:45,757 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:45,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:45,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1605471457, now seen corresponding path program 41 times [2021-06-05 06:58:45,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:45,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027528330] [2021-06-05 06:58:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:45,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:45,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027528330] [2021-06-05 06:58:45,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027528330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:45,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622119808] [2021-06-05 06:58:45,839 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:45,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:58:45,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:45,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:58:45,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:46,216 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:46,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622119808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:46,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:46,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 06:58:46,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257933134] [2021-06-05 06:58:46,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:58:46,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:46,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:58:46,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:58:46,218 INFO L87 Difference]: Start difference. First operand 1706 states and 4012 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:47,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:47,272 INFO L93 Difference]: Finished difference Result 3118 states and 6999 transitions. [2021-06-05 06:58:47,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:58:47,274 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 06:58:47,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:47,277 INFO L225 Difference]: With dead ends: 3118 [2021-06-05 06:58:47,277 INFO L226 Difference]: Without dead ends: 3109 [2021-06-05 06:58:47,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1003.1ms TimeCoverageRelationStatistics Valid=1134, Invalid=3836, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 06:58:47,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2021-06-05 06:58:47,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 1341. [2021-06-05 06:58:47,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 2.2753731343283583) internal successors, (3049), 1340 states have internal predecessors, (3049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:47,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 3049 transitions. [2021-06-05 06:58:47,297 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 3049 transitions. Word has length 33 [2021-06-05 06:58:47,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:47,297 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 3049 transitions. [2021-06-05 06:58:47,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:47,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 3049 transitions. [2021-06-05 06:58:47,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 06:58:47,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:47,299 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:47,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 06:58:47,513 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:47,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:47,513 INFO L82 PathProgramCache]: Analyzing trace with hash -755955681, now seen corresponding path program 42 times [2021-06-05 06:58:47,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:47,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118662381] [2021-06-05 06:58:47,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:47,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:47,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118662381] [2021-06-05 06:58:47,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118662381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:47,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832573811] [2021-06-05 06:58:47,557 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:47,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 06:58:47,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:47,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:58:47,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:47,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832573811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:47,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:47,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 22 [2021-06-05 06:58:47,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617116629] [2021-06-05 06:58:47,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:58:47,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:47,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:58:47,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:58:47,832 INFO L87 Difference]: Start difference. First operand 1341 states and 3049 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:49,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:49,258 INFO L93 Difference]: Finished difference Result 1686 states and 3705 transitions. [2021-06-05 06:58:49,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 06:58:49,259 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 06:58:49,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:49,260 INFO L225 Difference]: With dead ends: 1686 [2021-06-05 06:58:49,260 INFO L226 Difference]: Without dead ends: 1682 [2021-06-05 06:58:49,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 1345.5ms TimeCoverageRelationStatistics Valid=1570, Invalid=5236, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 06:58:49,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-06-05 06:58:49,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 953. [2021-06-05 06:58:49,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 2.277310924369748) internal successors, (2168), 952 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:49,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 2168 transitions. [2021-06-05 06:58:49,270 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 2168 transitions. Word has length 33 [2021-06-05 06:58:49,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:49,271 INFO L482 AbstractCegarLoop]: Abstraction has 953 states and 2168 transitions. [2021-06-05 06:58:49,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:49,271 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 2168 transitions. [2021-06-05 06:58:49,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 06:58:49,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:49,272 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:49,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:49,478 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:49,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:49,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1705903345, now seen corresponding path program 43 times [2021-06-05 06:58:49,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:49,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822179611] [2021-06-05 06:58:49,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:49,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:49,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822179611] [2021-06-05 06:58:49,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822179611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:49,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125258092] [2021-06-05 06:58:49,684 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:58:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:49,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:58:49,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:50,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125258092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:50,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:50,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:58:50,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725874270] [2021-06-05 06:58:50,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:58:50,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:50,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:58:50,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=976, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:58:50,259 INFO L87 Difference]: Start difference. First operand 953 states and 2168 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:52,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:52,215 INFO L93 Difference]: Finished difference Result 1262 states and 2779 transitions. [2021-06-05 06:58:52,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:58:52,215 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 06:58:52,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:52,217 INFO L225 Difference]: With dead ends: 1262 [2021-06-05 06:58:52,217 INFO L226 Difference]: Without dead ends: 1211 [2021-06-05 06:58:52,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 2039.0ms TimeCoverageRelationStatistics Valid=429, Invalid=4401, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:58:52,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2021-06-05 06:58:52,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 997. [2021-06-05 06:58:52,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 2.2710843373493974) internal successors, (2262), 996 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:52,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 2262 transitions. [2021-06-05 06:58:52,225 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 2262 transitions. Word has length 33 [2021-06-05 06:58:52,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:52,225 INFO L482 AbstractCegarLoop]: Abstraction has 997 states and 2262 transitions. [2021-06-05 06:58:52,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:52,225 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 2262 transitions. [2021-06-05 06:58:52,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 06:58:52,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:52,227 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:52,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:52,427 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:52,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:52,427 INFO L82 PathProgramCache]: Analyzing trace with hash -660596615, now seen corresponding path program 44 times [2021-06-05 06:58:52,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:52,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171227528] [2021-06-05 06:58:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:52,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:52,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171227528] [2021-06-05 06:58:52,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171227528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:52,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962724933] [2021-06-05 06:58:52,612 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:52,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:52,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:52,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:58:52,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:53,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962724933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:53,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:53,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:58:53,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386854805] [2021-06-05 06:58:53,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:58:53,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:53,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:58:53,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:58:53,102 INFO L87 Difference]: Start difference. First operand 997 states and 2262 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:56,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:56,002 INFO L93 Difference]: Finished difference Result 1563 states and 3372 transitions. [2021-06-05 06:58:56,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:58:56,003 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 06:58:56,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:56,004 INFO L225 Difference]: With dead ends: 1563 [2021-06-05 06:58:56,004 INFO L226 Difference]: Without dead ends: 1473 [2021-06-05 06:58:56,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2530 ImplicationChecksByTransitivity, 2527.1ms TimeCoverageRelationStatistics Valid=718, Invalid=8024, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 06:58:56,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2021-06-05 06:58:56,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1042. [2021-06-05 06:58:56,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 2.2632084534101824) internal successors, (2356), 1041 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:56,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 2356 transitions. [2021-06-05 06:58:56,014 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 2356 transitions. Word has length 33 [2021-06-05 06:58:56,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:56,014 INFO L482 AbstractCegarLoop]: Abstraction has 1042 states and 2356 transitions. [2021-06-05 06:58:56,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:56,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 2356 transitions. [2021-06-05 06:58:56,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 06:58:56,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:56,016 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:56,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 06:58:56,229 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:56,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:56,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1395928629, now seen corresponding path program 45 times [2021-06-05 06:58:56,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:56,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787214434] [2021-06-05 06:58:56,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:56,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:56,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787214434] [2021-06-05 06:58:56,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787214434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:56,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885740038] [2021-06-05 06:58:56,407 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:56,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:58:56,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:56,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:58:56,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:56,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885740038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:56,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:56,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:58:56,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785775809] [2021-06-05 06:58:56,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:58:56,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:56,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:58:56,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:58:56,921 INFO L87 Difference]: Start difference. First operand 1042 states and 2356 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:59,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:59,982 INFO L93 Difference]: Finished difference Result 1689 states and 3627 transitions. [2021-06-05 06:58:59,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 06:58:59,982 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 06:58:59,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:59,983 INFO L225 Difference]: With dead ends: 1689 [2021-06-05 06:58:59,983 INFO L226 Difference]: Without dead ends: 1674 [2021-06-05 06:58:59,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3180 ImplicationChecksByTransitivity, 2658.8ms TimeCoverageRelationStatistics Valid=809, Invalid=9697, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 06:58:59,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-06-05 06:58:59,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1087. [2021-06-05 06:58:59,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.2808471454880292) internal successors, (2477), 1086 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:59,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2477 transitions. [2021-06-05 06:58:59,994 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2477 transitions. Word has length 33 [2021-06-05 06:58:59,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:59,994 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 2477 transitions. [2021-06-05 06:58:59,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:59,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2477 transitions. [2021-06-05 06:58:59,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 06:58:59,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:59,995 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:00,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:00,201 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:00,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:00,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2066614151, now seen corresponding path program 46 times [2021-06-05 06:59:00,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:00,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616985496] [2021-06-05 06:59:00,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:00,401 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:00,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:00,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616985496] [2021-06-05 06:59:00,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616985496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:00,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94295920] [2021-06-05 06:59:00,402 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:00,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:00,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:00,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 06:59:00,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:00,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94295920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:00,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:00,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 06:59:00,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715612135] [2021-06-05 06:59:00,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:59:00,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:00,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:59:00,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:59:00,973 INFO L87 Difference]: Start difference. First operand 1087 states and 2477 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:02,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:02,948 INFO L93 Difference]: Finished difference Result 1528 states and 3365 transitions. [2021-06-05 06:59:02,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 06:59:02,949 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 06:59:02,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:02,950 INFO L225 Difference]: With dead ends: 1528 [2021-06-05 06:59:02,950 INFO L226 Difference]: Without dead ends: 1519 [2021-06-05 06:59:02,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 1833.2ms TimeCoverageRelationStatistics Valid=674, Invalid=5806, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 06:59:02,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-06-05 06:59:02,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1171. [2021-06-05 06:59:02,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 2.288034188034188) internal successors, (2677), 1170 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:02,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 2677 transitions. [2021-06-05 06:59:02,961 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 2677 transitions. Word has length 33 [2021-06-05 06:59:02,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:02,961 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 2677 transitions. [2021-06-05 06:59:02,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:02,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 2677 transitions. [2021-06-05 06:59:02,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 06:59:02,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:02,962 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:03,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:03,163 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:03,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:03,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2099610557, now seen corresponding path program 47 times [2021-06-05 06:59:03,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:03,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937607752] [2021-06-05 06:59:03,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:03,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:03,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937607752] [2021-06-05 06:59:03,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937607752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:03,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499125331] [2021-06-05 06:59:03,375 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:03,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:59:03,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:03,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:59:03,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:03,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499125331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:03,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:03,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:59:03,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696957224] [2021-06-05 06:59:03,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:59:03,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:03,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:59:03,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:59:03,877 INFO L87 Difference]: Start difference. First operand 1171 states and 2677 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:08,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:08,084 INFO L93 Difference]: Finished difference Result 1919 states and 4191 transitions. [2021-06-05 06:59:08,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 06:59:08,084 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 06:59:08,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:08,086 INFO L225 Difference]: With dead ends: 1919 [2021-06-05 06:59:08,086 INFO L226 Difference]: Without dead ends: 1913 [2021-06-05 06:59:08,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 3656.4ms TimeCoverageRelationStatistics Valid=1082, Invalid=9630, Unknown=0, NotChecked=0, Total=10712 [2021-06-05 06:59:08,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-06-05 06:59:08,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1267. [2021-06-05 06:59:08,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 2.3183254344391786) internal successors, (2935), 1266 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:08,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 2935 transitions. [2021-06-05 06:59:08,100 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 2935 transitions. Word has length 33 [2021-06-05 06:59:08,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:08,100 INFO L482 AbstractCegarLoop]: Abstraction has 1267 states and 2935 transitions. [2021-06-05 06:59:08,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:08,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 2935 transitions. [2021-06-05 06:59:08,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 06:59:08,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:08,101 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:08,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:08,302 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:08,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:08,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1545287769, now seen corresponding path program 48 times [2021-06-05 06:59:08,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:08,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140794621] [2021-06-05 06:59:08,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:08,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:08,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140794621] [2021-06-05 06:59:08,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140794621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:08,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607833393] [2021-06-05 06:59:08,482 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:08,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:59:08,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:08,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 06:59:08,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:09,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607833393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:09,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:09,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:59:09,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933066827] [2021-06-05 06:59:09,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:59:09,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:09,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:59:09,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:59:09,105 INFO L87 Difference]: Start difference. First operand 1267 states and 2935 transitions. Second operand has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:11,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:11,396 INFO L93 Difference]: Finished difference Result 1626 states and 3636 transitions. [2021-06-05 06:59:11,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:59:11,396 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 06:59:11,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:11,398 INFO L225 Difference]: With dead ends: 1626 [2021-06-05 06:59:11,398 INFO L226 Difference]: Without dead ends: 1611 [2021-06-05 06:59:11,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 2194.1ms TimeCoverageRelationStatistics Valid=560, Invalid=4552, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 06:59:11,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-06-05 06:59:11,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1287. [2021-06-05 06:59:11,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.3195956454121305) internal successors, (2983), 1286 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:11,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 2983 transitions. [2021-06-05 06:59:11,410 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 2983 transitions. Word has length 33 [2021-06-05 06:59:11,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:11,410 INFO L482 AbstractCegarLoop]: Abstraction has 1287 states and 2983 transitions. [2021-06-05 06:59:11,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:11,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 2983 transitions. [2021-06-05 06:59:11,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 06:59:11,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:11,411 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:11,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:11,612 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:11,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:11,612 INFO L82 PathProgramCache]: Analyzing trace with hash 497583413, now seen corresponding path program 49 times [2021-06-05 06:59:11,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:11,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422134576] [2021-06-05 06:59:11,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:11,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:11,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422134576] [2021-06-05 06:59:11,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422134576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:11,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525159447] [2021-06-05 06:59:11,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:59:11,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:11,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:59:11,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:12,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525159447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:12,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:12,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 27 [2021-06-05 06:59:12,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395228591] [2021-06-05 06:59:12,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:59:12,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:12,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:59:12,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:59:12,171 INFO L87 Difference]: Start difference. First operand 1287 states and 2983 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:13,820 INFO L93 Difference]: Finished difference Result 1934 states and 4341 transitions. [2021-06-05 06:59:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:59:13,821 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 06:59:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:13,822 INFO L225 Difference]: With dead ends: 1934 [2021-06-05 06:59:13,822 INFO L226 Difference]: Without dead ends: 1918 [2021-06-05 06:59:13,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1509.3ms TimeCoverageRelationStatistics Valid=491, Invalid=3049, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:59:13,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-06-05 06:59:13,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1287. [2021-06-05 06:59:13,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.3149300155520995) internal successors, (2977), 1286 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:13,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 2977 transitions. [2021-06-05 06:59:13,835 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 2977 transitions. Word has length 33 [2021-06-05 06:59:13,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:13,835 INFO L482 AbstractCegarLoop]: Abstraction has 1287 states and 2977 transitions. [2021-06-05 06:59:13,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:13,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 2977 transitions. [2021-06-05 06:59:13,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 06:59:13,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:13,836 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:14,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:14,052 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:14,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:14,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1527671729, now seen corresponding path program 50 times [2021-06-05 06:59:14,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:14,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359295767] [2021-06-05 06:59:14,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:14,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:14,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359295767] [2021-06-05 06:59:14,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359295767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:14,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701502221] [2021-06-05 06:59:14,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:59:14,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:14,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:14,324 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:59:14,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:15,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701502221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:15,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:15,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-06-05 06:59:15,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708655725] [2021-06-05 06:59:15,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 06:59:15,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:15,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 06:59:15,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:59:15,096 INFO L87 Difference]: Start difference. First operand 1287 states and 2977 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:17,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:17,131 INFO L93 Difference]: Finished difference Result 1543 states and 3469 transitions. [2021-06-05 06:59:17,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:59:17,131 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 06:59:17,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:17,132 INFO L225 Difference]: With dead ends: 1543 [2021-06-05 06:59:17,132 INFO L226 Difference]: Without dead ends: 1491 [2021-06-05 06:59:17,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 2165.1ms TimeCoverageRelationStatistics Valid=481, Invalid=4489, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 06:59:17,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2021-06-05 06:59:17,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1288. [2021-06-05 06:59:17,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 2.312354312354312) internal successors, (2976), 1287 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:17,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 2976 transitions. [2021-06-05 06:59:17,143 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 2976 transitions. Word has length 33 [2021-06-05 06:59:17,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:17,143 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 2976 transitions. [2021-06-05 06:59:17,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:17,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 2976 transitions. [2021-06-05 06:59:17,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 06:59:17,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:17,145 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:17,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-06-05 06:59:17,345 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:17,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:17,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1040701503, now seen corresponding path program 51 times [2021-06-05 06:59:17,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:17,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219412176] [2021-06-05 06:59:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:17,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:17,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219412176] [2021-06-05 06:59:17,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219412176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:17,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692573620] [2021-06-05 06:59:17,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:17,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:59:17,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:17,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:59:17,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:18,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692573620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:18,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:18,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:59:18,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039913030] [2021-06-05 06:59:18,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:59:18,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:18,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:59:18,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:59:18,120 INFO L87 Difference]: Start difference. First operand 1288 states and 2976 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:21,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:21,854 INFO L93 Difference]: Finished difference Result 1720 states and 3833 transitions. [2021-06-05 06:59:21,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 06:59:21,865 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 06:59:21,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:21,866 INFO L225 Difference]: With dead ends: 1720 [2021-06-05 06:59:21,866 INFO L226 Difference]: Without dead ends: 1654 [2021-06-05 06:59:21,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2654 ImplicationChecksByTransitivity, 3418.3ms TimeCoverageRelationStatistics Valid=647, Invalid=8665, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 06:59:21,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2021-06-05 06:59:21,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1395. [2021-06-05 06:59:21,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 2.317790530846485) internal successors, (3231), 1394 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 3231 transitions. [2021-06-05 06:59:21,879 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 3231 transitions. Word has length 33 [2021-06-05 06:59:21,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:21,879 INFO L482 AbstractCegarLoop]: Abstraction has 1395 states and 3231 transitions. [2021-06-05 06:59:21,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:21,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 3231 transitions. [2021-06-05 06:59:21,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 06:59:21,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:21,881 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:22,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-05 06:59:22,082 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:22,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:22,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1325798457, now seen corresponding path program 52 times [2021-06-05 06:59:22,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:22,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742042494] [2021-06-05 06:59:22,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:22,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:22,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:22,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742042494] [2021-06-05 06:59:22,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742042494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:22,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247252684] [2021-06-05 06:59:22,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:22,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:22,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:22,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:59:22,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:22,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247252684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:22,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:22,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:59:22,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458764675] [2021-06-05 06:59:22,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:59:22,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:22,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:59:22,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=973, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:59:22,841 INFO L87 Difference]: Start difference. First operand 1395 states and 3231 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:28,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:28,265 INFO L93 Difference]: Finished difference Result 1758 states and 3924 transitions. [2021-06-05 06:59:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 06:59:28,266 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 06:59:28,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:28,267 INFO L225 Difference]: With dead ends: 1758 [2021-06-05 06:59:28,267 INFO L226 Difference]: Without dead ends: 1734 [2021-06-05 06:59:28,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4515 ImplicationChecksByTransitivity, 4971.4ms TimeCoverageRelationStatistics Valid=947, Invalid=13095, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 06:59:28,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-06-05 06:59:28,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1409. [2021-06-05 06:59:28,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 2.321022727272727) internal successors, (3268), 1408 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:28,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 3268 transitions. [2021-06-05 06:59:28,281 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 3268 transitions. Word has length 33 [2021-06-05 06:59:28,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:28,281 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 3268 transitions. [2021-06-05 06:59:28,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:28,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 3268 transitions. [2021-06-05 06:59:28,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 06:59:28,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:28,283 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:28,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-06-05 06:59:28,493 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:28,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:28,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1454541045, now seen corresponding path program 53 times [2021-06-05 06:59:28,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:28,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185024665] [2021-06-05 06:59:28,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:28,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:28,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185024665] [2021-06-05 06:59:28,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185024665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:28,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168762445] [2021-06-05 06:59:28,702 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:28,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:59:28,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:28,728 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 06:59:28,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:29,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168762445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:29,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:29,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 06:59:29,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759229616] [2021-06-05 06:59:29,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:59:29,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:29,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:59:29,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:59:29,354 INFO L87 Difference]: Start difference. First operand 1409 states and 3268 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:31,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:31,946 INFO L93 Difference]: Finished difference Result 2073 states and 4601 transitions. [2021-06-05 06:59:31,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 06:59:31,946 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 06:59:31,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:31,948 INFO L225 Difference]: With dead ends: 2073 [2021-06-05 06:59:31,948 INFO L226 Difference]: Without dead ends: 2070 [2021-06-05 06:59:31,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 2631.8ms TimeCoverageRelationStatistics Valid=756, Invalid=6216, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 06:59:31,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-06-05 06:59:31,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1510. [2021-06-05 06:59:31,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 2.3459244532803183) internal successors, (3540), 1509 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:31,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 3540 transitions. [2021-06-05 06:59:31,963 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 3540 transitions. Word has length 33 [2021-06-05 06:59:31,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:31,963 INFO L482 AbstractCegarLoop]: Abstraction has 1510 states and 3540 transitions. [2021-06-05 06:59:31,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:31,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 3540 transitions. [2021-06-05 06:59:31,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 06:59:31,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:31,965 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:32,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-06-05 06:59:32,165 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:32,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:32,166 INFO L82 PathProgramCache]: Analyzing trace with hash 121030207, now seen corresponding path program 54 times [2021-06-05 06:59:32,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:32,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633085390] [2021-06-05 06:59:32,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:32,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:32,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633085390] [2021-06-05 06:59:32,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633085390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:32,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266800238] [2021-06-05 06:59:32,441 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:32,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:59:32,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:32,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:59:32,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:32,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266800238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:32,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:32,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 06:59:32,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894668788] [2021-06-05 06:59:32,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:59:32,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:32,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:59:32,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:59:32,938 INFO L87 Difference]: Start difference. First operand 1510 states and 3540 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:35,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:35,403 INFO L93 Difference]: Finished difference Result 2367 states and 5373 transitions. [2021-06-05 06:59:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:59:35,403 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 06:59:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:35,406 INFO L225 Difference]: With dead ends: 2367 [2021-06-05 06:59:35,406 INFO L226 Difference]: Without dead ends: 2333 [2021-06-05 06:59:35,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2353.6ms TimeCoverageRelationStatistics Valid=589, Invalid=3833, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:59:35,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-05 06:59:35,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1622. [2021-06-05 06:59:35,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 2.338679827267119) internal successors, (3791), 1621 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:35,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 3791 transitions. [2021-06-05 06:59:35,423 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 3791 transitions. Word has length 33 [2021-06-05 06:59:35,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:35,423 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 3791 transitions. [2021-06-05 06:59:35,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:35,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 3791 transitions. [2021-06-05 06:59:35,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 06:59:35,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:35,425 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:35,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-06-05 06:59:35,626 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:35,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:35,626 INFO L82 PathProgramCache]: Analyzing trace with hash -167618429, now seen corresponding path program 55 times [2021-06-05 06:59:35,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:35,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558388709] [2021-06-05 06:59:35,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:35,871 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:35,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:35,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558388709] [2021-06-05 06:59:35,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558388709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:35,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058681837] [2021-06-05 06:59:35,871 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:35,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:59:35,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:36,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058681837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:36,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:36,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-05 06:59:36,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615369052] [2021-06-05 06:59:36,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:59:36,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:36,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:59:36,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:59:36,379 INFO L87 Difference]: Start difference. First operand 1622 states and 3791 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:39,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:39,474 INFO L93 Difference]: Finished difference Result 2788 states and 6296 transitions. [2021-06-05 06:59:39,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:59:39,474 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 06:59:39,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:39,477 INFO L225 Difference]: With dead ends: 2788 [2021-06-05 06:59:39,477 INFO L226 Difference]: Without dead ends: 2754 [2021-06-05 06:59:39,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 2871.9ms TimeCoverageRelationStatistics Valid=761, Invalid=4939, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 06:59:39,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2754 states. [2021-06-05 06:59:39,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2754 to 1754. [2021-06-05 06:59:39,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1753 states have (on average 2.3462635482030803) internal successors, (4113), 1753 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:39,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 4113 transitions. [2021-06-05 06:59:39,495 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 4113 transitions. Word has length 33 [2021-06-05 06:59:39,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:39,495 INFO L482 AbstractCegarLoop]: Abstraction has 1754 states and 4113 transitions. [2021-06-05 06:59:39,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:39,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 4113 transitions. [2021-06-05 06:59:39,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 06:59:39,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:39,497 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:39,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:39,698 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:39,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:39,698 INFO L82 PathProgramCache]: Analyzing trace with hash 534308859, now seen corresponding path program 56 times [2021-06-05 06:59:39,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:39,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824213435] [2021-06-05 06:59:39,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:39,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:39,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824213435] [2021-06-05 06:59:39,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824213435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:39,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586486641] [2021-06-05 06:59:39,918 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:39,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:39,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:39,943 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 06:59:39,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:40,571 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:40,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586486641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:40,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:40,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 06:59:40,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187725745] [2021-06-05 06:59:40,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:59:40,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:40,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:59:40,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:59:40,572 INFO L87 Difference]: Start difference. First operand 1754 states and 4113 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:42,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:42,493 INFO L93 Difference]: Finished difference Result 2147 states and 4872 transitions. [2021-06-05 06:59:42,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:59:42,494 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 06:59:42,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:42,496 INFO L225 Difference]: With dead ends: 2147 [2021-06-05 06:59:42,496 INFO L226 Difference]: Without dead ends: 2126 [2021-06-05 06:59:42,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 1792.7ms TimeCoverageRelationStatistics Valid=340, Invalid=4082, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:59:42,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-06-05 06:59:42,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1806. [2021-06-05 06:59:42,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 2.3473684210526318) internal successors, (4237), 1805 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:42,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 4237 transitions. [2021-06-05 06:59:42,512 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 4237 transitions. Word has length 33 [2021-06-05 06:59:42,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:42,512 INFO L482 AbstractCegarLoop]: Abstraction has 1806 states and 4237 transitions. [2021-06-05 06:59:42,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:42,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 4237 transitions. [2021-06-05 06:59:42,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 06:59:42,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:42,514 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:42,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:42,715 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:42,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:42,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1630351679, now seen corresponding path program 57 times [2021-06-05 06:59:42,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:42,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957552905] [2021-06-05 06:59:42,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:42,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:42,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957552905] [2021-06-05 06:59:42,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957552905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:42,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641947593] [2021-06-05 06:59:42,931 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:42,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:59:42,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:42,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 06:59:42,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:43,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641947593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:43,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:43,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 06:59:43,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819835345] [2021-06-05 06:59:43,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:59:43,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:43,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:59:43,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:59:43,563 INFO L87 Difference]: Start difference. First operand 1806 states and 4237 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:45,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:45,868 INFO L93 Difference]: Finished difference Result 2353 states and 5326 transitions. [2021-06-05 06:59:45,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:59:45,868 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 06:59:45,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:45,871 INFO L225 Difference]: With dead ends: 2353 [2021-06-05 06:59:45,871 INFO L226 Difference]: Without dead ends: 2311 [2021-06-05 06:59:45,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1812 ImplicationChecksByTransitivity, 2306.4ms TimeCoverageRelationStatistics Valid=799, Invalid=5521, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 06:59:45,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2021-06-05 06:59:45,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 1865. [2021-06-05 06:59:45,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 2.342811158798283) internal successors, (4367), 1864 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 4367 transitions. [2021-06-05 06:59:45,890 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 4367 transitions. Word has length 33 [2021-06-05 06:59:45,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:45,890 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 4367 transitions. [2021-06-05 06:59:45,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:45,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 4367 transitions. [2021-06-05 06:59:45,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 06:59:45,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:45,892 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:46,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:46,108 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:46,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:46,109 INFO L82 PathProgramCache]: Analyzing trace with hash -385362437, now seen corresponding path program 58 times [2021-06-05 06:59:46,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:46,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775387773] [2021-06-05 06:59:46,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:46,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:46,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775387773] [2021-06-05 06:59:46,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775387773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:46,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948596358] [2021-06-05 06:59:46,382 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:46,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:46,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:46,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:59:46,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:46,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948596358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:46,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:46,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-05 06:59:46,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764727905] [2021-06-05 06:59:46,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 06:59:46,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:46,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 06:59:46,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:59:46,898 INFO L87 Difference]: Start difference. First operand 1865 states and 4367 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:49,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:49,435 INFO L93 Difference]: Finished difference Result 3037 states and 6913 transitions. [2021-06-05 06:59:49,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:59:49,435 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 06:59:49,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:49,438 INFO L225 Difference]: With dead ends: 3037 [2021-06-05 06:59:49,438 INFO L226 Difference]: Without dead ends: 2970 [2021-06-05 06:59:49,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 2488.3ms TimeCoverageRelationStatistics Valid=826, Invalid=4576, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 06:59:49,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2021-06-05 06:59:49,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 1932. [2021-06-05 06:59:49,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.335059554634904) internal successors, (4509), 1931 states have internal predecessors, (4509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 4509 transitions. [2021-06-05 06:59:49,458 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 4509 transitions. Word has length 33 [2021-06-05 06:59:49,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:49,458 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 4509 transitions. [2021-06-05 06:59:49,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:49,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 4509 transitions. [2021-06-05 06:59:49,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 06:59:49,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:49,460 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:49,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-06-05 06:59:49,661 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:49,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:49,661 INFO L82 PathProgramCache]: Analyzing trace with hash 237419395, now seen corresponding path program 59 times [2021-06-05 06:59:49,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:49,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420754387] [2021-06-05 06:59:49,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:49,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:49,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420754387] [2021-06-05 06:59:49,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420754387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:49,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372304027] [2021-06-05 06:59:49,819 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:49,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 06:59:49,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:49,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:59:49,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:50,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372304027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:50,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:50,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-05 06:59:50,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429458424] [2021-06-05 06:59:50,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:59:50,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:50,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:59:50,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:59:50,358 INFO L87 Difference]: Start difference. First operand 1932 states and 4509 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:52,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:52,883 INFO L93 Difference]: Finished difference Result 3720 states and 8375 transitions. [2021-06-05 06:59:52,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 06:59:52,883 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 06:59:52,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:52,886 INFO L225 Difference]: With dead ends: 3720 [2021-06-05 06:59:52,886 INFO L226 Difference]: Without dead ends: 3639 [2021-06-05 06:59:52,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 2357.0ms TimeCoverageRelationStatistics Valid=944, Invalid=4908, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 06:59:52,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2021-06-05 06:59:52,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 2060. [2021-06-05 06:59:52,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 2.329286061194755) internal successors, (4796), 2059 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:52,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 4796 transitions. [2021-06-05 06:59:52,909 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 4796 transitions. Word has length 33 [2021-06-05 06:59:52,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:52,909 INFO L482 AbstractCegarLoop]: Abstraction has 2060 states and 4796 transitions. [2021-06-05 06:59:52,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:52,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 4796 transitions. [2021-06-05 06:59:52,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 06:59:52,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:52,911 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:53,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:53,112 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:53,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:53,112 INFO L82 PathProgramCache]: Analyzing trace with hash 174645243, now seen corresponding path program 60 times [2021-06-05 06:59:53,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:53,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946600767] [2021-06-05 06:59:53,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:53,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:53,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946600767] [2021-06-05 06:59:53,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946600767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:53,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637836112] [2021-06-05 06:59:53,336 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:53,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:59:53,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:53,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 06:59:53,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:53,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637836112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:53,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:53,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 06:59:53,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816809256] [2021-06-05 06:59:53,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:59:53,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:53,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:59:53,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:59:53,875 INFO L87 Difference]: Start difference. First operand 2060 states and 4796 transitions. Second operand has 32 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:56,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:56,827 INFO L93 Difference]: Finished difference Result 3836 states and 8664 transitions. [2021-06-05 06:59:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 06:59:56,828 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 06:59:56,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:56,831 INFO L225 Difference]: With dead ends: 3836 [2021-06-05 06:59:56,831 INFO L226 Difference]: Without dead ends: 3773 [2021-06-05 06:59:56,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 2807.0ms TimeCoverageRelationStatistics Valid=1036, Invalid=6620, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 06:59:56,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3773 states. [2021-06-05 06:59:56,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3773 to 2341. [2021-06-05 06:59:56,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2341 states, 2340 states have (on average 2.345726495726496) internal successors, (5489), 2340 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:56,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 5489 transitions. [2021-06-05 06:59:56,856 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 5489 transitions. Word has length 33 [2021-06-05 06:59:56,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:56,856 INFO L482 AbstractCegarLoop]: Abstraction has 2341 states and 5489 transitions. [2021-06-05 06:59:56,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:56,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 5489 transitions. [2021-06-05 06:59:56,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 06:59:56,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:56,859 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:57,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable765 [2021-06-05 06:59:57,059 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:57,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:57,060 INFO L82 PathProgramCache]: Analyzing trace with hash 42093407, now seen corresponding path program 61 times [2021-06-05 06:59:57,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:57,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238572993] [2021-06-05 06:59:57,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:57,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:57,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238572993] [2021-06-05 06:59:57,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238572993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:57,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915590308] [2021-06-05 06:59:57,242 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) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:57,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 06:59:57,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:57,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915590308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:57,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:57,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-05 06:59:57,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675317631] [2021-06-05 06:59:57,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 06:59:57,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:57,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 06:59:57,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:59:57,803 INFO L87 Difference]: Start difference. First operand 2341 states and 5489 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:59,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:59,270 INFO L93 Difference]: Finished difference Result 3299 states and 7593 transitions. [2021-06-05 06:59:59,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:59:59,270 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 06:59:59,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:59,273 INFO L225 Difference]: With dead ends: 3299 [2021-06-05 06:59:59,273 INFO L226 Difference]: Without dead ends: 3247 [2021-06-05 06:59:59,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 1482.6ms TimeCoverageRelationStatistics Valid=669, Invalid=4023, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:59:59,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2021-06-05 06:59:59,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 2377. [2021-06-05 06:59:59,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2376 states have (on average 2.3434343434343434) internal successors, (5568), 2376 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:59,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 5568 transitions. [2021-06-05 06:59:59,296 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 5568 transitions. Word has length 35 [2021-06-05 06:59:59,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:59,296 INFO L482 AbstractCegarLoop]: Abstraction has 2377 states and 5568 transitions. [2021-06-05 06:59:59,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:59,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 5568 transitions. [2021-06-05 06:59:59,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 06:59:59,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:59,299 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:59,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-06-05 06:59:59,499 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:59,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:59,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1208064305, now seen corresponding path program 62 times [2021-06-05 06:59:59,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:59,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492053194] [2021-06-05 06:59:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:59,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:59,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492053194] [2021-06-05 06:59:59,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492053194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:59,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284153167] [2021-06-05 06:59:59,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:59,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:59,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:59,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 06:59:59,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:00,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284153167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:00,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:00,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-05 07:00:00,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308145702] [2021-06-05 07:00:00,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:00,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:00,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:00,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:00,224 INFO L87 Difference]: Start difference. First operand 2377 states and 5568 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:01,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:01,689 INFO L93 Difference]: Finished difference Result 3241 states and 7484 transitions. [2021-06-05 07:00:01,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:00:01,689 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:00:01,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:01,692 INFO L225 Difference]: With dead ends: 3241 [2021-06-05 07:00:01,692 INFO L226 Difference]: Without dead ends: 3193 [2021-06-05 07:00:01,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1426.6ms TimeCoverageRelationStatistics Valid=571, Invalid=3589, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 07:00:01,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2021-06-05 07:00:01,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 2387. [2021-06-05 07:00:01,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 2.341994970662196) internal successors, (5588), 2386 states have internal predecessors, (5588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 5588 transitions. [2021-06-05 07:00:01,720 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 5588 transitions. Word has length 35 [2021-06-05 07:00:01,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:01,720 INFO L482 AbstractCegarLoop]: Abstraction has 2387 states and 5588 transitions. [2021-06-05 07:00:01,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:01,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 5588 transitions. [2021-06-05 07:00:01,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:00:01,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:01,723 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:01,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable802,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:01,940 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:01,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:01,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1268866609, now seen corresponding path program 63 times [2021-06-05 07:00:01,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:01,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548520045] [2021-06-05 07:00:01,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:02,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:02,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548520045] [2021-06-05 07:00:02,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548520045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:02,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743593503] [2021-06-05 07:00:02,134 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) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:02,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:00:02,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:02,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:00:02,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:02,818 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:02,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743593503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:02,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:02,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-05 07:00:02,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114161868] [2021-06-05 07:00:02,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:02,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:02,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:02,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:02,819 INFO L87 Difference]: Start difference. First operand 2387 states and 5588 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:04,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:04,981 INFO L93 Difference]: Finished difference Result 3451 states and 7906 transitions. [2021-06-05 07:00:04,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 07:00:04,981 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:00:04,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:04,985 INFO L225 Difference]: With dead ends: 3451 [2021-06-05 07:00:04,985 INFO L226 Difference]: Without dead ends: 3409 [2021-06-05 07:00:04,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 2119.2ms TimeCoverageRelationStatistics Valid=923, Invalid=5083, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 07:00:04,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2021-06-05 07:00:05,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 2419. [2021-06-05 07:00:05,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2418 states have (on average 2.339950372208437) internal successors, (5658), 2418 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 5658 transitions. [2021-06-05 07:00:05,020 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 5658 transitions. Word has length 35 [2021-06-05 07:00:05,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:05,020 INFO L482 AbstractCegarLoop]: Abstraction has 2419 states and 5658 transitions. [2021-06-05 07:00:05,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:05,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 5658 transitions. [2021-06-05 07:00:05,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:00:05,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:05,026 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:05,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable822,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:05,242 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:05,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:05,243 INFO L82 PathProgramCache]: Analyzing trace with hash 2098249707, now seen corresponding path program 64 times [2021-06-05 07:00:05,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:05,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274967432] [2021-06-05 07:00:05,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:05,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:05,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274967432] [2021-06-05 07:00:05,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274967432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:05,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097840189] [2021-06-05 07:00:05,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:05,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:05,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:05,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:00:05,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:06,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097840189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:06,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:06,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-05 07:00:06,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109246463] [2021-06-05 07:00:06,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:06,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:06,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:06,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:06,266 INFO L87 Difference]: Start difference. First operand 2419 states and 5658 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:08,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:08,246 INFO L93 Difference]: Finished difference Result 3327 states and 7665 transitions. [2021-06-05 07:00:08,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:00:08,246 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:00:08,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:08,249 INFO L225 Difference]: With dead ends: 3327 [2021-06-05 07:00:08,249 INFO L226 Difference]: Without dead ends: 3273 [2021-06-05 07:00:08,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 2070.7ms TimeCoverageRelationStatistics Valid=674, Invalid=4156, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 07:00:08,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-06-05 07:00:08,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2423. [2021-06-05 07:00:08,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 2.3393889347646573) internal successors, (5666), 2422 states have internal predecessors, (5666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:08,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 5666 transitions. [2021-06-05 07:00:08,274 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 5666 transitions. Word has length 35 [2021-06-05 07:00:08,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:08,274 INFO L482 AbstractCegarLoop]: Abstraction has 2423 states and 5666 transitions. [2021-06-05 07:00:08,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:08,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 5666 transitions. [2021-06-05 07:00:08,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:00:08,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:08,276 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:08,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-06-05 07:00:08,477 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:08,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:08,477 INFO L82 PathProgramCache]: Analyzing trace with hash -2135915285, now seen corresponding path program 65 times [2021-06-05 07:00:08,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:08,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509093114] [2021-06-05 07:00:08,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:08,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:08,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509093114] [2021-06-05 07:00:08,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509093114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:08,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057885715] [2021-06-05 07:00:08,755 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 [2021-06-05 07:00:08,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:00:08,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:08,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:00:08,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:09,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057885715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:09,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:09,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-05 07:00:09,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277443112] [2021-06-05 07:00:09,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:09,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:09,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:09,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:09,383 INFO L87 Difference]: Start difference. First operand 2423 states and 5666 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:11,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:11,753 INFO L93 Difference]: Finished difference Result 3537 states and 8101 transitions. [2021-06-05 07:00:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:00:11,753 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:00:11,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:11,757 INFO L225 Difference]: With dead ends: 3537 [2021-06-05 07:00:11,757 INFO L226 Difference]: Without dead ends: 3495 [2021-06-05 07:00:11,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 2390.6ms TimeCoverageRelationStatistics Valid=1079, Invalid=5563, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 07:00:11,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3495 states. [2021-06-05 07:00:11,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3495 to 2421. [2021-06-05 07:00:11,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2420 states have (on average 2.3396694214876033) internal successors, (5662), 2420 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:11,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 5662 transitions. [2021-06-05 07:00:11,785 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 5662 transitions. Word has length 35 [2021-06-05 07:00:11,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:11,785 INFO L482 AbstractCegarLoop]: Abstraction has 2421 states and 5662 transitions. [2021-06-05 07:00:11,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:11,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 5662 transitions. [2021-06-05 07:00:11,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:00:11,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:11,787 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:11,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable858 [2021-06-05 07:00:11,988 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:11,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:11,988 INFO L82 PathProgramCache]: Analyzing trace with hash -354380241, now seen corresponding path program 66 times [2021-06-05 07:00:11,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:11,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066455608] [2021-06-05 07:00:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:12,240 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:12,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:12,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066455608] [2021-06-05 07:00:12,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066455608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:12,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728799291] [2021-06-05 07:00:12,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:12,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:00:12,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:12,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:00:12,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:12,908 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:12,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728799291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:12,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:12,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-05 07:00:12,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941344245] [2021-06-05 07:00:12,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:12,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:12,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:12,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:12,909 INFO L87 Difference]: Start difference. First operand 2421 states and 5662 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:16,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:16,266 INFO L93 Difference]: Finished difference Result 3760 states and 8574 transitions. [2021-06-05 07:00:16,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 07:00:16,266 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:00:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:16,270 INFO L225 Difference]: With dead ends: 3760 [2021-06-05 07:00:16,271 INFO L226 Difference]: Without dead ends: 3718 [2021-06-05 07:00:16,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 3203.3ms TimeCoverageRelationStatistics Valid=1483, Invalid=8219, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 07:00:16,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2021-06-05 07:00:16,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 2453. [2021-06-05 07:00:16,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 2.33931484502447) internal successors, (5736), 2452 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:16,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 5736 transitions. [2021-06-05 07:00:16,311 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 5736 transitions. Word has length 35 [2021-06-05 07:00:16,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:16,311 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 5736 transitions. [2021-06-05 07:00:16,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:16,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 5736 transitions. [2021-06-05 07:00:16,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:00:16,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:16,314 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:16,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable879,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:16,517 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:16,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:16,518 INFO L82 PathProgramCache]: Analyzing trace with hash -643028877, now seen corresponding path program 67 times [2021-06-05 07:00:16,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:16,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782749262] [2021-06-05 07:00:16,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:16,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:16,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782749262] [2021-06-05 07:00:16,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782749262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:16,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275598900] [2021-06-05 07:00:16,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:16,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:00:16,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:17,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275598900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:17,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:17,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-05 07:00:17,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274800977] [2021-06-05 07:00:17,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:17,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:17,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:17,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:17,387 INFO L87 Difference]: Start difference. First operand 2453 states and 5736 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:21,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:21,282 INFO L93 Difference]: Finished difference Result 4092 states and 9200 transitions. [2021-06-05 07:00:21,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 07:00:21,282 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:00:21,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:21,285 INFO L225 Difference]: With dead ends: 4092 [2021-06-05 07:00:21,285 INFO L226 Difference]: Without dead ends: 4052 [2021-06-05 07:00:21,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4119 ImplicationChecksByTransitivity, 3618.6ms TimeCoverageRelationStatistics Valid=1844, Invalid=10146, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 07:00:21,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4052 states. [2021-06-05 07:00:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4052 to 2489. [2021-06-05 07:00:21,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2489 states, 2488 states have (on average 2.3392282958199355) internal successors, (5820), 2488 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:21,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 5820 transitions. [2021-06-05 07:00:21,314 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 5820 transitions. Word has length 35 [2021-06-05 07:00:21,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:21,314 INFO L482 AbstractCegarLoop]: Abstraction has 2489 states and 5820 transitions. [2021-06-05 07:00:21,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:21,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 5820 transitions. [2021-06-05 07:00:21,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:00:21,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:21,316 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:21,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable898,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:21,520 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:21,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:21,520 INFO L82 PathProgramCache]: Analyzing trace with hash 268401591, now seen corresponding path program 68 times [2021-06-05 07:00:21,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:21,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782648421] [2021-06-05 07:00:21,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:21,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:21,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782648421] [2021-06-05 07:00:21,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782648421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:21,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378593996] [2021-06-05 07:00:21,722 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) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:21,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:21,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:21,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:00:21,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:22,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378593996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:22,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:22,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-05 07:00:22,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127552485] [2021-06-05 07:00:22,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:22,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:22,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:22,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:22,325 INFO L87 Difference]: Start difference. First operand 2489 states and 5820 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:26,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:26,162 INFO L93 Difference]: Finished difference Result 4809 states and 10645 transitions. [2021-06-05 07:00:26,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 07:00:26,163 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:00:26,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:26,167 INFO L225 Difference]: With dead ends: 4809 [2021-06-05 07:00:26,167 INFO L226 Difference]: Without dead ends: 4769 [2021-06-05 07:00:26,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3487 ImplicationChecksByTransitivity, 3338.9ms TimeCoverageRelationStatistics Valid=1613, Invalid=9099, Unknown=0, NotChecked=0, Total=10712 [2021-06-05 07:00:26,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4769 states. [2021-06-05 07:00:26,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4769 to 2561. [2021-06-05 07:00:26,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 2.346875) internal successors, (6008), 2560 states have internal predecessors, (6008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:26,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 6008 transitions. [2021-06-05 07:00:26,197 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 6008 transitions. Word has length 35 [2021-06-05 07:00:26,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:26,197 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 6008 transitions. [2021-06-05 07:00:26,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:26,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 6008 transitions. [2021-06-05 07:00:26,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:00:26,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:26,199 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:26,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:26,400 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:26,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:26,400 INFO L82 PathProgramCache]: Analyzing trace with hash -461964319, now seen corresponding path program 69 times [2021-06-05 07:00:26,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:26,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332698893] [2021-06-05 07:00:26,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:26,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:26,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332698893] [2021-06-05 07:00:26,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332698893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:26,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552730105] [2021-06-05 07:00:26,549 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 [2021-06-05 07:00:26,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 07:00:26,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:26,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:00:26,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:26,979 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:26,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552730105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:26,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:26,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 07:00:26,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273276647] [2021-06-05 07:00:26,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 07:00:26,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:26,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 07:00:26,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:00:26,980 INFO L87 Difference]: Start difference. First operand 2561 states and 6008 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:28,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:28,406 INFO L93 Difference]: Finished difference Result 3689 states and 8571 transitions. [2021-06-05 07:00:28,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:00:28,406 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:00:28,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:28,410 INFO L225 Difference]: With dead ends: 3689 [2021-06-05 07:00:28,410 INFO L226 Difference]: Without dead ends: 3687 [2021-06-05 07:00:28,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1318.8ms TimeCoverageRelationStatistics Valid=607, Invalid=3299, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 07:00:28,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2021-06-05 07:00:28,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 2760. [2021-06-05 07:00:28,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2760 states, 2759 states have (on average 2.3599130119608556) internal successors, (6511), 2759 states have internal predecessors, (6511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:28,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2760 states to 2760 states and 6511 transitions. [2021-06-05 07:00:28,439 INFO L78 Accepts]: Start accepts. Automaton has 2760 states and 6511 transitions. Word has length 35 [2021-06-05 07:00:28,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:28,439 INFO L482 AbstractCegarLoop]: Abstraction has 2760 states and 6511 transitions. [2021-06-05 07:00:28,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:28,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2760 states and 6511 transitions. [2021-06-05 07:00:28,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:00:28,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:28,442 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:28,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable940,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:28,649 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:28,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:28,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2016394933, now seen corresponding path program 70 times [2021-06-05 07:00:28,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:28,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743854429] [2021-06-05 07:00:28,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:28,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:28,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743854429] [2021-06-05 07:00:28,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743854429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:28,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704487221] [2021-06-05 07:00:28,942 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 [2021-06-05 07:00:28,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:28,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:28,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:00:28,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:29,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704487221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:29,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:29,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-05 07:00:29,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66566507] [2021-06-05 07:00:29,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:29,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:29,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:29,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:29,549 INFO L87 Difference]: Start difference. First operand 2760 states and 6511 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:33,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:33,054 INFO L93 Difference]: Finished difference Result 3976 states and 9161 transitions. [2021-06-05 07:00:33,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 07:00:33,055 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:00:33,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:33,059 INFO L225 Difference]: With dead ends: 3976 [2021-06-05 07:00:33,059 INFO L226 Difference]: Without dead ends: 3916 [2021-06-05 07:00:33,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3668 ImplicationChecksByTransitivity, 3293.5ms TimeCoverageRelationStatistics Valid=1313, Invalid=9193, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 07:00:33,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2021-06-05 07:00:33,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 2774. [2021-06-05 07:00:33,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2773 states have (on average 2.3609808871258564) internal successors, (6547), 2773 states have internal predecessors, (6547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 6547 transitions. [2021-06-05 07:00:33,133 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 6547 transitions. Word has length 35 [2021-06-05 07:00:33,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:33,133 INFO L482 AbstractCegarLoop]: Abstraction has 2774 states and 6547 transitions. [2021-06-05 07:00:33,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:33,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 6547 transitions. [2021-06-05 07:00:33,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:00:33,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:33,135 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:33,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable956 [2021-06-05 07:00:33,336 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:33,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:33,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2077197237, now seen corresponding path program 71 times [2021-06-05 07:00:33,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:33,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178794859] [2021-06-05 07:00:33,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:33,568 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:33,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:33,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178794859] [2021-06-05 07:00:33,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178794859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:33,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264928723] [2021-06-05 07:00:33,569 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 [2021-06-05 07:00:33,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:00:33,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:33,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:00:33,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:34,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264928723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:34,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:34,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-05 07:00:34,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431424791] [2021-06-05 07:00:34,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:00:34,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:34,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:00:34,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:00:34,174 INFO L87 Difference]: Start difference. First operand 2774 states and 6547 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:37,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:37,613 INFO L93 Difference]: Finished difference Result 4131 states and 9524 transitions. [2021-06-05 07:00:37,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 07:00:37,613 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:00:37,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:37,617 INFO L225 Difference]: With dead ends: 4131 [2021-06-05 07:00:37,617 INFO L226 Difference]: Without dead ends: 4089 [2021-06-05 07:00:37,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3041 ImplicationChecksByTransitivity, 3244.2ms TimeCoverageRelationStatistics Valid=1423, Invalid=7889, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 07:00:37,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-06-05 07:00:37,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 2805. [2021-06-05 07:00:37,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2805 states, 2804 states have (on average 2.361626248216833) internal successors, (6622), 2804 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:37,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 6622 transitions. [2021-06-05 07:00:37,646 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 6622 transitions. Word has length 35 [2021-06-05 07:00:37,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:37,646 INFO L482 AbstractCegarLoop]: Abstraction has 2805 states and 6622 transitions. [2021-06-05 07:00:37,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:37,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 6622 transitions. [2021-06-05 07:00:37,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:00:37,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:37,649 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:37,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable977,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:37,849 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:37,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:37,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1617056775, now seen corresponding path program 72 times [2021-06-05 07:00:37,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:37,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784659093] [2021-06-05 07:00:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:38,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:38,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784659093] [2021-06-05 07:00:38,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784659093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:38,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847893479] [2021-06-05 07:00:38,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:38,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:00:38,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:38,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:00:38,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:38,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847893479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:38,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:38,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 07:00:38,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658001101] [2021-06-05 07:00:38,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 07:00:38,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:38,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 07:00:38,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:00:38,463 INFO L87 Difference]: Start difference. First operand 2805 states and 6622 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:40,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:40,269 INFO L93 Difference]: Finished difference Result 3500 states and 8075 transitions. [2021-06-05 07:00:40,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 07:00:40,269 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:00:40,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:40,273 INFO L225 Difference]: With dead ends: 3500 [2021-06-05 07:00:40,273 INFO L226 Difference]: Without dead ends: 3500 [2021-06-05 07:00:40,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1763.4ms TimeCoverageRelationStatistics Valid=849, Invalid=3981, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 07:00:40,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-06-05 07:00:40,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 2817. [2021-06-05 07:00:40,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2816 states have (on average 2.3597301136363638) internal successors, (6645), 2816 states have internal predecessors, (6645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:40,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 6645 transitions. [2021-06-05 07:00:40,300 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 6645 transitions. Word has length 35 [2021-06-05 07:00:40,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:40,301 INFO L482 AbstractCegarLoop]: Abstraction has 2817 states and 6645 transitions. [2021-06-05 07:00:40,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:40,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 6645 transitions. [2021-06-05 07:00:40,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:00:40,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:40,303 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:40,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable998 [2021-06-05 07:00:40,506 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:40,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:40,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1905705411, now seen corresponding path program 73 times [2021-06-05 07:00:40,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:40,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607877696] [2021-06-05 07:00:40,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:40,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:40,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607877696] [2021-06-05 07:00:40,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607877696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:40,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816001019] [2021-06-05 07:00:40,680 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 [2021-06-05 07:00:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:40,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:00:40,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:41,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816001019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:41,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:41,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 07:00:41,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814590380] [2021-06-05 07:00:41,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 07:00:41,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:41,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 07:00:41,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:00:41,101 INFO L87 Difference]: Start difference. First operand 2817 states and 6645 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:43,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:43,046 INFO L93 Difference]: Finished difference Result 3661 states and 8422 transitions. [2021-06-05 07:00:43,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 07:00:43,047 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:00:43,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:43,050 INFO L225 Difference]: With dead ends: 3661 [2021-06-05 07:00:43,050 INFO L226 Difference]: Without dead ends: 3661 [2021-06-05 07:00:43,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 1840.4ms TimeCoverageRelationStatistics Valid=939, Invalid=4463, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 07:00:43,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2021-06-05 07:00:43,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 2821. [2021-06-05 07:00:43,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2821 states, 2820 states have (on average 2.3613475177304966) internal successors, (6659), 2820 states have internal predecessors, (6659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:43,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 6659 transitions. [2021-06-05 07:00:43,080 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 6659 transitions. Word has length 35 [2021-06-05 07:00:43,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:43,080 INFO L482 AbstractCegarLoop]: Abstraction has 2821 states and 6659 transitions. [2021-06-05 07:00:43,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:43,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 6659 transitions. [2021-06-05 07:00:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:00:43,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:43,082 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:43,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1014,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:43,283 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:43,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:43,283 INFO L82 PathProgramCache]: Analyzing trace with hash -994274943, now seen corresponding path program 74 times [2021-06-05 07:00:43,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:43,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536029710] [2021-06-05 07:00:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:43,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:43,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536029710] [2021-06-05 07:00:43,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536029710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:43,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120252034] [2021-06-05 07:00:43,451 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) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:43,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:43,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:43,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:00:43,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:43,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120252034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:43,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:43,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 07:00:43,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214706383] [2021-06-05 07:00:43,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 07:00:43,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:43,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 07:00:43,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:00:43,902 INFO L87 Difference]: Start difference. First operand 2821 states and 6659 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:45,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:45,696 INFO L93 Difference]: Finished difference Result 4400 states and 10185 transitions. [2021-06-05 07:00:45,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 07:00:45,697 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:00:45,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:45,701 INFO L225 Difference]: With dead ends: 4400 [2021-06-05 07:00:45,701 INFO L226 Difference]: Without dead ends: 4400 [2021-06-05 07:00:45,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 1736.8ms TimeCoverageRelationStatistics Valid=887, Invalid=4225, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 07:00:45,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4400 states. [2021-06-05 07:00:45,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4400 to 2832. [2021-06-05 07:00:45,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2832 states, 2831 states have (on average 2.362062875309078) internal successors, (6687), 2831 states have internal predecessors, (6687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:45,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 6687 transitions. [2021-06-05 07:00:45,732 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 6687 transitions. Word has length 35 [2021-06-05 07:00:45,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:45,732 INFO L482 AbstractCegarLoop]: Abstraction has 2832 states and 6687 transitions. [2021-06-05 07:00:45,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:45,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 6687 transitions. [2021-06-05 07:00:45,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:00:45,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:45,734 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:45,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1033 [2021-06-05 07:00:45,935 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:45,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:45,935 INFO L82 PathProgramCache]: Analyzing trace with hash -22956363, now seen corresponding path program 75 times [2021-06-05 07:00:45,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:45,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877408856] [2021-06-05 07:00:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:46,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:46,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877408856] [2021-06-05 07:00:46,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877408856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:46,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065554861] [2021-06-05 07:00:46,184 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 [2021-06-05 07:00:46,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:00:46,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:46,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:00:46,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:46,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065554861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:46,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:46,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-05 07:00:46,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750510661] [2021-06-05 07:00:46,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 07:00:46,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:46,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 07:00:46,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:00:46,813 INFO L87 Difference]: Start difference. First operand 2832 states and 6687 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:49,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:49,916 INFO L93 Difference]: Finished difference Result 4002 states and 9232 transitions. [2021-06-05 07:00:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 07:00:49,916 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:00:49,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:49,920 INFO L225 Difference]: With dead ends: 4002 [2021-06-05 07:00:49,920 INFO L226 Difference]: Without dead ends: 3948 [2021-06-05 07:00:49,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2853 ImplicationChecksByTransitivity, 2963.8ms TimeCoverageRelationStatistics Valid=1083, Invalid=7473, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 07:00:49,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-06-05 07:00:49,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 2856. [2021-06-05 07:00:49,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2856 states, 2855 states have (on average 2.360420315236427) internal successors, (6739), 2855 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2856 states to 2856 states and 6739 transitions. [2021-06-05 07:00:49,950 INFO L78 Accepts]: Start accepts. Automaton has 2856 states and 6739 transitions. Word has length 35 [2021-06-05 07:00:49,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:49,950 INFO L482 AbstractCegarLoop]: Abstraction has 2856 states and 6739 transitions. [2021-06-05 07:00:49,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:49,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2856 states and 6739 transitions. [2021-06-05 07:00:49,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:00:49,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:49,952 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:50,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1052,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:50,153 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:50,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:50,153 INFO L82 PathProgramCache]: Analyzing trace with hash -44282443, now seen corresponding path program 76 times [2021-06-05 07:00:50,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:50,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354381642] [2021-06-05 07:00:50,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:50,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:50,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354381642] [2021-06-05 07:00:50,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354381642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:50,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81161639] [2021-06-05 07:00:50,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:50,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:50,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:50,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:00:50,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:51,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81161639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:51,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:51,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-05 07:00:51,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562955475] [2021-06-05 07:00:51,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 07:00:51,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:51,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 07:00:51,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:00:51,068 INFO L87 Difference]: Start difference. First operand 2856 states and 6739 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:53,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:53,711 INFO L93 Difference]: Finished difference Result 3842 states and 8918 transitions. [2021-06-05 07:00:53,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 07:00:53,711 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:00:53,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:53,714 INFO L225 Difference]: With dead ends: 3842 [2021-06-05 07:00:53,714 INFO L226 Difference]: Without dead ends: 3770 [2021-06-05 07:00:53,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1845 ImplicationChecksByTransitivity, 2744.3ms TimeCoverageRelationStatistics Valid=887, Invalid=5119, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 07:00:53,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3770 states. [2021-06-05 07:00:53,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3770 to 2860. [2021-06-05 07:00:53,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 2859 states have (on average 2.3585169639734174) internal successors, (6743), 2859 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:53,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 6743 transitions. [2021-06-05 07:00:53,741 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 6743 transitions. Word has length 35 [2021-06-05 07:00:53,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:53,741 INFO L482 AbstractCegarLoop]: Abstraction has 2860 states and 6743 transitions. [2021-06-05 07:00:53,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:53,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 6743 transitions. [2021-06-05 07:00:53,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:00:53,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:53,744 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:53,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:53,944 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:53,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:53,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1833180341, now seen corresponding path program 77 times [2021-06-05 07:00:53,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:53,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543508301] [2021-06-05 07:00:53,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:54,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:54,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543508301] [2021-06-05 07:00:54,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543508301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:54,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843515220] [2021-06-05 07:00:54,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:54,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 07:00:54,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:54,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:00:54,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:54,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843515220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:54,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:54,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 07:00:54,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098032290] [2021-06-05 07:00:54,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 07:00:54,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:54,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 07:00:54,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:00:54,555 INFO L87 Difference]: Start difference. First operand 2860 states and 6743 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:56,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:56,225 INFO L93 Difference]: Finished difference Result 5084 states and 11781 transitions. [2021-06-05 07:00:56,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:00:56,225 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:00:56,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:56,230 INFO L225 Difference]: With dead ends: 5084 [2021-06-05 07:00:56,230 INFO L226 Difference]: Without dead ends: 5084 [2021-06-05 07:00:56,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 1583.5ms TimeCoverageRelationStatistics Valid=771, Invalid=3651, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 07:00:56,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5084 states. [2021-06-05 07:00:56,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5084 to 3004. [2021-06-05 07:00:56,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 3003 states have (on average 2.3533133533133532) internal successors, (7067), 3003 states have internal predecessors, (7067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 7067 transitions. [2021-06-05 07:00:56,265 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 7067 transitions. Word has length 35 [2021-06-05 07:00:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:56,265 INFO L482 AbstractCegarLoop]: Abstraction has 3004 states and 7067 transitions. [2021-06-05 07:00:56,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:56,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 7067 transitions. [2021-06-05 07:00:56,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:00:56,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:56,268 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:56,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1093 [2021-06-05 07:00:56,468 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:56,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:56,468 INFO L82 PathProgramCache]: Analyzing trace with hash 846119997, now seen corresponding path program 78 times [2021-06-05 07:00:56,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:56,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371955134] [2021-06-05 07:00:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:00:56,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:56,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371955134] [2021-06-05 07:00:56,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371955134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:56,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159029082] [2021-06-05 07:00:56,635 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 [2021-06-05 07:00:56,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 07:00:56,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:56,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:00:56,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:56,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159029082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:56,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:56,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-06-05 07:00:56,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539515478] [2021-06-05 07:00:56,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:00:56,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:56,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:00:56,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:00:56,823 INFO L87 Difference]: Start difference. First operand 3004 states and 7067 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:57,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:57,828 INFO L93 Difference]: Finished difference Result 4189 states and 9617 transitions. [2021-06-05 07:00:57,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 07:00:57,828 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:00:57,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:57,832 INFO L225 Difference]: With dead ends: 4189 [2021-06-05 07:00:57,832 INFO L226 Difference]: Without dead ends: 4153 [2021-06-05 07:00:57,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 863.4ms TimeCoverageRelationStatistics Valid=521, Invalid=2341, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:00:57,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2021-06-05 07:00:57,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 2873. [2021-06-05 07:00:57,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2873 states, 2872 states have (on average 2.3467966573816157) internal successors, (6740), 2872 states have internal predecessors, (6740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:57,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2873 states to 2873 states and 6740 transitions. [2021-06-05 07:00:57,861 INFO L78 Accepts]: Start accepts. Automaton has 2873 states and 6740 transitions. Word has length 35 [2021-06-05 07:00:57,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:57,862 INFO L482 AbstractCegarLoop]: Abstraction has 2873 states and 6740 transitions. [2021-06-05 07:00:57,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:57,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2873 states and 6740 transitions. [2021-06-05 07:00:57,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:00:57,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:57,864 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:00:58,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-06-05 07:00:58,077 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:58,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:58,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1809722061, now seen corresponding path program 79 times [2021-06-05 07:00:58,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:58,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601475586] [2021-06-05 07:00:58,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:58,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:58,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601475586] [2021-06-05 07:00:58,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601475586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:58,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538094238] [2021-06-05 07:00:58,267 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 [2021-06-05 07:00:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:58,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:00:58,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:58,907 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:58,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538094238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:58,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:58,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-05 07:00:58,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825252154] [2021-06-05 07:00:58,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 07:00:58,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:58,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 07:00:58,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:00:58,908 INFO L87 Difference]: Start difference. First operand 2873 states and 6740 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:02,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:02,338 INFO L93 Difference]: Finished difference Result 4270 states and 9783 transitions. [2021-06-05 07:01:02,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 07:01:02,339 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:01:02,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:02,342 INFO L225 Difference]: With dead ends: 4270 [2021-06-05 07:01:02,342 INFO L226 Difference]: Without dead ends: 4222 [2021-06-05 07:01:02,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3551 ImplicationChecksByTransitivity, 3334.2ms TimeCoverageRelationStatistics Valid=1575, Invalid=8727, Unknown=0, NotChecked=0, Total=10302 [2021-06-05 07:01:02,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4222 states. [2021-06-05 07:01:02,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4222 to 2879. [2021-06-05 07:01:02,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.3467685892981236) internal successors, (6754), 2878 states have internal predecessors, (6754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:02,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 6754 transitions. [2021-06-05 07:01:02,383 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 6754 transitions. Word has length 35 [2021-06-05 07:01:02,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:02,383 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 6754 transitions. [2021-06-05 07:01:02,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:02,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 6754 transitions. [2021-06-05 07:01:02,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:01:02,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:02,385 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:02,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1116,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:02,598 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:02,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:02,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1249714381, now seen corresponding path program 80 times [2021-06-05 07:01:02,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:02,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167300578] [2021-06-05 07:01:02,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:01:02,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:02,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167300578] [2021-06-05 07:01:02,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167300578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:02,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755090123] [2021-06-05 07:01:02,790 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 [2021-06-05 07:01:02,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:01:02,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:02,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:01:02,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:03,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755090123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:03,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:03,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-05 07:01:03,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077067130] [2021-06-05 07:01:03,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 07:01:03,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:03,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 07:01:03,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:01:03,331 INFO L87 Difference]: Start difference. First operand 2879 states and 6754 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:06,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:06,113 INFO L93 Difference]: Finished difference Result 5077 states and 11546 transitions. [2021-06-05 07:01:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 07:01:06,114 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:01:06,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:06,118 INFO L225 Difference]: With dead ends: 5077 [2021-06-05 07:01:06,119 INFO L226 Difference]: Without dead ends: 4993 [2021-06-05 07:01:06,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2361 ImplicationChecksByTransitivity, 2701.0ms TimeCoverageRelationStatistics Valid=1052, Invalid=6258, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 07:01:06,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2021-06-05 07:01:06,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 3061. [2021-06-05 07:01:06,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3061 states, 3060 states have (on average 2.3532679738562092) internal successors, (7201), 3060 states have internal predecessors, (7201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 7201 transitions. [2021-06-05 07:01:06,164 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 7201 transitions. Word has length 35 [2021-06-05 07:01:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:06,164 INFO L482 AbstractCegarLoop]: Abstraction has 3061 states and 7201 transitions. [2021-06-05 07:01:06,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:06,164 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 7201 transitions. [2021-06-05 07:01:06,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:01:06,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:06,167 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:06,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1136 [2021-06-05 07:01:06,367 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:06,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:06,367 INFO L82 PathProgramCache]: Analyzing trace with hash -366524553, now seen corresponding path program 81 times [2021-06-05 07:01:06,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:06,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379213007] [2021-06-05 07:01:06,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:06,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:06,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:06,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379213007] [2021-06-05 07:01:06,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379213007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:06,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433034241] [2021-06-05 07:01:06,535 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) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:06,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 07:01:06,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:06,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:01:06,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:07,143 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:07,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433034241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:07,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:07,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-05 07:01:07,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21565803] [2021-06-05 07:01:07,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 07:01:07,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:07,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 07:01:07,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:01:07,144 INFO L87 Difference]: Start difference. First operand 3061 states and 7201 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:10,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:10,453 INFO L93 Difference]: Finished difference Result 5205 states and 11840 transitions. [2021-06-05 07:01:10,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 07:01:10,453 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:01:10,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:10,457 INFO L225 Difference]: With dead ends: 5205 [2021-06-05 07:01:10,458 INFO L226 Difference]: Without dead ends: 5157 [2021-06-05 07:01:10,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2893 ImplicationChecksByTransitivity, 3107.3ms TimeCoverageRelationStatistics Valid=1325, Invalid=7417, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 07:01:10,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5157 states. [2021-06-05 07:01:10,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5157 to 3104. [2021-06-05 07:01:10,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 3103 states have (on average 2.350306155333548) internal successors, (7293), 3103 states have internal predecessors, (7293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:10,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 7293 transitions. [2021-06-05 07:01:10,493 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 7293 transitions. Word has length 35 [2021-06-05 07:01:10,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:10,493 INFO L482 AbstractCegarLoop]: Abstraction has 3104 states and 7293 transitions. [2021-06-05 07:01:10,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:10,494 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 7293 transitions. [2021-06-05 07:01:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:01:10,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:10,496 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:10,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-06-05 07:01:10,712 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:10,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:10,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1433047865, now seen corresponding path program 82 times [2021-06-05 07:01:10,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:10,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101097196] [2021-06-05 07:01:10,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:10,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:10,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101097196] [2021-06-05 07:01:10,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101097196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:10,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222015680] [2021-06-05 07:01:10,984 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 [2021-06-05 07:01:11,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:01:11,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:11,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:01:11,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:11,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222015680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:11,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:11,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-05 07:01:11,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706711795] [2021-06-05 07:01:11,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:11,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:11,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:11,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:11,578 INFO L87 Difference]: Start difference. First operand 3104 states and 7293 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:15,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:15,993 INFO L93 Difference]: Finished difference Result 4625 states and 10559 transitions. [2021-06-05 07:01:15,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 07:01:15,994 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:01:15,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:15,998 INFO L225 Difference]: With dead ends: 4625 [2021-06-05 07:01:15,998 INFO L226 Difference]: Without dead ends: 4559 [2021-06-05 07:01:15,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5744 ImplicationChecksByTransitivity, 4213.0ms TimeCoverageRelationStatistics Valid=2007, Invalid=13493, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 07:01:16,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4559 states. [2021-06-05 07:01:16,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4559 to 3124. [2021-06-05 07:01:16,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 2.3519052193403778) internal successors, (7345), 3123 states have internal predecessors, (7345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:16,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 7345 transitions. [2021-06-05 07:01:16,038 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 7345 transitions. Word has length 35 [2021-06-05 07:01:16,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:16,038 INFO L482 AbstractCegarLoop]: Abstraction has 3124 states and 7345 transitions. [2021-06-05 07:01:16,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:16,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 7345 transitions. [2021-06-05 07:01:16,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:01:16,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:16,041 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:16,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:16,242 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:16,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:16,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1902771911, now seen corresponding path program 83 times [2021-06-05 07:01:16,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:16,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199173017] [2021-06-05 07:01:16,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:16,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:16,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199173017] [2021-06-05 07:01:16,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199173017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:16,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979107008] [2021-06-05 07:01:16,528 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:16,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:01:16,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:16,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 07:01:16,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:17,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979107008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:17,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:17,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-05 07:01:17,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764582021] [2021-06-05 07:01:17,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:17,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:17,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:17,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:17,124 INFO L87 Difference]: Start difference. First operand 3124 states and 7345 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:20,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:20,850 INFO L93 Difference]: Finished difference Result 4367 states and 10055 transitions. [2021-06-05 07:01:20,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 07:01:20,851 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:01:20,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:20,855 INFO L225 Difference]: With dead ends: 4367 [2021-06-05 07:01:20,855 INFO L226 Difference]: Without dead ends: 4331 [2021-06-05 07:01:20,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3566 ImplicationChecksByTransitivity, 3613.6ms TimeCoverageRelationStatistics Valid=1380, Invalid=9126, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 07:01:20,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4331 states. [2021-06-05 07:01:20,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4331 to 3128. [2021-06-05 07:01:20,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 2.351455068755996) internal successors, (7353), 3127 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 7353 transitions. [2021-06-05 07:01:20,890 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 7353 transitions. Word has length 35 [2021-06-05 07:01:20,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:20,890 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 7353 transitions. [2021-06-05 07:01:20,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:20,890 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 7353 transitions. [2021-06-05 07:01:20,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:01:20,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:20,893 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:21,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1195,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:21,094 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:21,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:21,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1493850169, now seen corresponding path program 84 times [2021-06-05 07:01:21,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:21,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825923170] [2021-06-05 07:01:21,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:21,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:21,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825923170] [2021-06-05 07:01:21,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825923170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:21,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263890024] [2021-06-05 07:01:21,345 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:21,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:01:21,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:21,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:01:21,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:21,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263890024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:21,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:21,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-05 07:01:21,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749315101] [2021-06-05 07:01:21,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:21,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:21,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:21,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:21,959 INFO L87 Difference]: Start difference. First operand 3128 states and 7353 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:27,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:27,098 INFO L93 Difference]: Finished difference Result 4790 states and 10902 transitions. [2021-06-05 07:01:27,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 07:01:27,099 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:01:27,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:27,103 INFO L225 Difference]: With dead ends: 4790 [2021-06-05 07:01:27,103 INFO L226 Difference]: Without dead ends: 4748 [2021-06-05 07:01:27,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6035 ImplicationChecksByTransitivity, 4881.6ms TimeCoverageRelationStatistics Valid=2422, Invalid=14090, Unknown=0, NotChecked=0, Total=16512 [2021-06-05 07:01:27,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4748 states. [2021-06-05 07:01:27,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4748 to 3140. [2021-06-05 07:01:27,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 3139 states have (on average 2.352341510035043) internal successors, (7384), 3139 states have internal predecessors, (7384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 7384 transitions. [2021-06-05 07:01:27,137 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 7384 transitions. Word has length 35 [2021-06-05 07:01:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:27,137 INFO L482 AbstractCegarLoop]: Abstraction has 3140 states and 7384 transitions. [2021-06-05 07:01:27,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:27,137 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 7384 transitions. [2021-06-05 07:01:27,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:01:27,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:27,140 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:27,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1217 [2021-06-05 07:01:27,341 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:27,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:27,341 INFO L82 PathProgramCache]: Analyzing trace with hash 2094563453, now seen corresponding path program 85 times [2021-06-05 07:01:27,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:27,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212315288] [2021-06-05 07:01:27,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:01:27,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:27,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212315288] [2021-06-05 07:01:27,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212315288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:27,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229768236] [2021-06-05 07:01:27,526 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:27,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:01:27,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:27,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229768236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:27,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:27,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 07:01:27,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686673181] [2021-06-05 07:01:27,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 07:01:27,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:27,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 07:01:27,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:01:27,971 INFO L87 Difference]: Start difference. First operand 3140 states and 7384 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:29,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:29,968 INFO L93 Difference]: Finished difference Result 3894 states and 8946 transitions. [2021-06-05 07:01:29,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 07:01:29,969 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:01:29,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:29,973 INFO L225 Difference]: With dead ends: 3894 [2021-06-05 07:01:29,973 INFO L226 Difference]: Without dead ends: 3894 [2021-06-05 07:01:29,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 1859.7ms TimeCoverageRelationStatistics Valid=1006, Invalid=4396, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 07:01:29,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3894 states. [2021-06-05 07:01:30,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3894 to 3148. [2021-06-05 07:01:30,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3148 states, 3147 states have (on average 2.3511280584683827) internal successors, (7399), 3147 states have internal predecessors, (7399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:30,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3148 states to 3148 states and 7399 transitions. [2021-06-05 07:01:30,010 INFO L78 Accepts]: Start accepts. Automaton has 3148 states and 7399 transitions. Word has length 35 [2021-06-05 07:01:30,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:30,010 INFO L482 AbstractCegarLoop]: Abstraction has 3148 states and 7399 transitions. [2021-06-05 07:01:30,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:30,010 INFO L276 IsEmpty]: Start isEmpty. Operand 3148 states and 7399 transitions. [2021-06-05 07:01:30,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:01:30,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:30,014 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:30,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1235 [2021-06-05 07:01:30,217 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:30,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:30,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1577622011, now seen corresponding path program 86 times [2021-06-05 07:01:30,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:30,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819309146] [2021-06-05 07:01:30,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:30,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:30,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819309146] [2021-06-05 07:01:30,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819309146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:30,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274813269] [2021-06-05 07:01:30,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:30,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:01:30,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:30,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:01:30,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:30,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274813269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:30,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:30,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 07:01:30,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260894119] [2021-06-05 07:01:30,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 07:01:30,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:30,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 07:01:30,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:01:30,789 INFO L87 Difference]: Start difference. First operand 3148 states and 7399 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:32,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:32,701 INFO L93 Difference]: Finished difference Result 4657 states and 10723 transitions. [2021-06-05 07:01:32,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:01:32,701 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:01:32,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:32,706 INFO L225 Difference]: With dead ends: 4657 [2021-06-05 07:01:32,706 INFO L226 Difference]: Without dead ends: 4654 [2021-06-05 07:01:32,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 1761.6ms TimeCoverageRelationStatistics Valid=896, Invalid=4216, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 07:01:32,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2021-06-05 07:01:32,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 3187. [2021-06-05 07:01:32,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3187 states, 3186 states have (on average 2.349968612680477) internal successors, (7487), 3186 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) [2021-06-05 07:01:32,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3187 states to 3187 states and 7487 transitions. [2021-06-05 07:01:32,739 INFO L78 Accepts]: Start accepts. Automaton has 3187 states and 7487 transitions. Word has length 35 [2021-06-05 07:01:32,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:32,739 INFO L482 AbstractCegarLoop]: Abstraction has 3187 states and 7487 transitions. [2021-06-05 07:01:32,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:32,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3187 states and 7487 transitions. [2021-06-05 07:01:32,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:01:32,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:32,742 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:32,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-06-05 07:01:32,945 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:32,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:32,945 INFO L82 PathProgramCache]: Analyzing trace with hash -2070250695, now seen corresponding path program 87 times [2021-06-05 07:01:32,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:32,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754360992] [2021-06-05 07:01:32,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:33,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:33,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754360992] [2021-06-05 07:01:33,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754360992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:33,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481652412] [2021-06-05 07:01:33,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:33,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 07:01:33,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:33,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 07:01:33,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:33,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481652412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:33,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:33,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 07:01:33,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407745262] [2021-06-05 07:01:33,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 07:01:33,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:33,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 07:01:33,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:01:33,534 INFO L87 Difference]: Start difference. First operand 3187 states and 7487 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:35,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:35,147 INFO L93 Difference]: Finished difference Result 5710 states and 13179 transitions. [2021-06-05 07:01:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 07:01:35,148 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:01:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:35,153 INFO L225 Difference]: With dead ends: 5710 [2021-06-05 07:01:35,153 INFO L226 Difference]: Without dead ends: 5686 [2021-06-05 07:01:35,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 1446.2ms TimeCoverageRelationStatistics Valid=857, Invalid=3835, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 07:01:35,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-06-05 07:01:35,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 4202. [2021-06-05 07:01:35,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4202 states, 4201 states have (on average 2.379909545346346) internal successors, (9998), 4201 states have internal predecessors, (9998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:35,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4202 states to 4202 states and 9998 transitions. [2021-06-05 07:01:35,198 INFO L78 Accepts]: Start accepts. Automaton has 4202 states and 9998 transitions. Word has length 35 [2021-06-05 07:01:35,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:35,198 INFO L482 AbstractCegarLoop]: Abstraction has 4202 states and 9998 transitions. [2021-06-05 07:01:35,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:35,198 INFO L276 IsEmpty]: Start isEmpty. Operand 4202 states and 9998 transitions. [2021-06-05 07:01:35,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:01:35,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:35,201 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:35,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1276 [2021-06-05 07:01:35,402 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:35,402 INFO L82 PathProgramCache]: Analyzing trace with hash 739863609, now seen corresponding path program 88 times [2021-06-05 07:01:35,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:35,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622525359] [2021-06-05 07:01:35,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:35,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:35,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622525359] [2021-06-05 07:01:35,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622525359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:35,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350617104] [2021-06-05 07:01:35,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:35,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:01:35,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:35,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:01:35,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:36,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350617104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:36,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:36,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-05 07:01:36,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443172909] [2021-06-05 07:01:36,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 07:01:36,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:36,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 07:01:36,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:01:36,230 INFO L87 Difference]: Start difference. First operand 4202 states and 9998 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:40,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:40,125 INFO L93 Difference]: Finished difference Result 7108 states and 16347 transitions. [2021-06-05 07:01:40,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 07:01:40,126 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:01:40,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:40,132 INFO L225 Difference]: With dead ends: 7108 [2021-06-05 07:01:40,132 INFO L226 Difference]: Without dead ends: 7017 [2021-06-05 07:01:40,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4316 ImplicationChecksByTransitivity, 3501.9ms TimeCoverageRelationStatistics Valid=1552, Invalid=10658, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 07:01:40,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7017 states. [2021-06-05 07:01:40,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7017 to 4409. [2021-06-05 07:01:40,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 2.3940562613430125) internal successors, (10553), 4408 states have internal predecessors, (10553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:40,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 10553 transitions. [2021-06-05 07:01:40,185 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 10553 transitions. Word has length 35 [2021-06-05 07:01:40,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:40,185 INFO L482 AbstractCegarLoop]: Abstraction has 4409 states and 10553 transitions. [2021-06-05 07:01:40,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:40,186 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 10553 transitions. [2021-06-05 07:01:40,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:01:40,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:40,189 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:40,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1293,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:40,390 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:40,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:40,390 INFO L82 PathProgramCache]: Analyzing trace with hash -179807687, now seen corresponding path program 89 times [2021-06-05 07:01:40,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:40,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442956302] [2021-06-05 07:01:40,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:40,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:40,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442956302] [2021-06-05 07:01:40,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442956302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:40,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336783100] [2021-06-05 07:01:40,577 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:40,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 07:01:40,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:40,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:01:40,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:40,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336783100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:40,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:40,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-06-05 07:01:40,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607994831] [2021-06-05 07:01:40,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 07:01:40,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:40,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 07:01:40,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:01:40,953 INFO L87 Difference]: Start difference. First operand 4409 states and 10553 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:45,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:45,117 INFO L93 Difference]: Finished difference Result 6487 states and 15070 transitions. [2021-06-05 07:01:45,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 07:01:45,117 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:01:45,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:45,123 INFO L225 Difference]: With dead ends: 6487 [2021-06-05 07:01:45,124 INFO L226 Difference]: Without dead ends: 6433 [2021-06-05 07:01:45,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3538 ImplicationChecksByTransitivity, 3592.9ms TimeCoverageRelationStatistics Valid=1209, Invalid=10347, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 07:01:45,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6433 states. [2021-06-05 07:01:45,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6433 to 4475. [2021-06-05 07:01:45,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4475 states, 4474 states have (on average 2.388913723737148) internal successors, (10688), 4474 states have internal predecessors, (10688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:45,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4475 states to 4475 states and 10688 transitions. [2021-06-05 07:01:45,182 INFO L78 Accepts]: Start accepts. Automaton has 4475 states and 10688 transitions. Word has length 35 [2021-06-05 07:01:45,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:45,182 INFO L482 AbstractCegarLoop]: Abstraction has 4475 states and 10688 transitions. [2021-06-05 07:01:45,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:45,182 INFO L276 IsEmpty]: Start isEmpty. Operand 4475 states and 10688 transitions. [2021-06-05 07:01:45,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:01:45,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:45,186 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:45,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1316,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:45,386 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:45,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:45,387 INFO L82 PathProgramCache]: Analyzing trace with hash -724083655, now seen corresponding path program 90 times [2021-06-05 07:01:45,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:45,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080661525] [2021-06-05 07:01:45,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:01:45,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:45,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080661525] [2021-06-05 07:01:45,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080661525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:45,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678843671] [2021-06-05 07:01:45,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:45,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 07:01:45,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:45,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 07:01:45,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:45,898 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:45,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678843671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:45,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:45,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 07:01:45,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447043461] [2021-06-05 07:01:45,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 07:01:45,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:45,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 07:01:45,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:01:45,899 INFO L87 Difference]: Start difference. First operand 4475 states and 10688 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:47,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:47,174 INFO L93 Difference]: Finished difference Result 6393 states and 14863 transitions. [2021-06-05 07:01:47,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:01:47,175 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:01:47,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:47,181 INFO L225 Difference]: With dead ends: 6393 [2021-06-05 07:01:47,181 INFO L226 Difference]: Without dead ends: 6357 [2021-06-05 07:01:47,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 1217.7ms TimeCoverageRelationStatistics Valid=825, Invalid=3465, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 07:01:47,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6357 states. [2021-06-05 07:01:47,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6357 to 4465. [2021-06-05 07:01:47,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4465 states, 4464 states have (on average 2.3875448028673834) internal successors, (10658), 4464 states have internal predecessors, (10658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:47,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4465 states to 4465 states and 10658 transitions. [2021-06-05 07:01:47,240 INFO L78 Accepts]: Start accepts. Automaton has 4465 states and 10658 transitions. Word has length 35 [2021-06-05 07:01:47,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:47,240 INFO L482 AbstractCegarLoop]: Abstraction has 4465 states and 10658 transitions. [2021-06-05 07:01:47,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:47,240 INFO L276 IsEmpty]: Start isEmpty. Operand 4465 states and 10658 transitions. [2021-06-05 07:01:47,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:01:47,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:47,244 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:47,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1325 [2021-06-05 07:01:47,453 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:47,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:47,453 INFO L82 PathProgramCache]: Analyzing trace with hash 756997177, now seen corresponding path program 91 times [2021-06-05 07:01:47,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:47,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735426564] [2021-06-05 07:01:47,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:47,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:47,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735426564] [2021-06-05 07:01:47,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735426564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:47,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061365009] [2021-06-05 07:01:47,563 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:47,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 07:01:47,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:48,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061365009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:48,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:48,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 07:01:48,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545617970] [2021-06-05 07:01:48,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 07:01:48,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:48,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 07:01:48,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:01:48,008 INFO L87 Difference]: Start difference. First operand 4465 states and 10658 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:49,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:49,245 INFO L93 Difference]: Finished difference Result 5425 states and 12731 transitions. [2021-06-05 07:01:49,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 07:01:49,246 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:01:49,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:49,251 INFO L225 Difference]: With dead ends: 5425 [2021-06-05 07:01:49,251 INFO L226 Difference]: Without dead ends: 5407 [2021-06-05 07:01:49,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1204.1ms TimeCoverageRelationStatistics Valid=797, Invalid=3363, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 07:01:49,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5407 states. [2021-06-05 07:01:49,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5407 to 4211. [2021-06-05 07:01:49,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4211 states, 4210 states have (on average 2.3767220902612824) internal successors, (10006), 4210 states have internal predecessors, (10006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4211 states to 4211 states and 10006 transitions. [2021-06-05 07:01:49,301 INFO L78 Accepts]: Start accepts. Automaton has 4211 states and 10006 transitions. Word has length 35 [2021-06-05 07:01:49,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:49,301 INFO L482 AbstractCegarLoop]: Abstraction has 4211 states and 10006 transitions. [2021-06-05 07:01:49,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:49,301 INFO L276 IsEmpty]: Start isEmpty. Operand 4211 states and 10006 transitions. [2021-06-05 07:01:49,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:01:49,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:49,304 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:49,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1340,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:49,505 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:49,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:49,505 INFO L82 PathProgramCache]: Analyzing trace with hash 938061735, now seen corresponding path program 92 times [2021-06-05 07:01:49,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:49,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794474040] [2021-06-05 07:01:49,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:49,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:49,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794474040] [2021-06-05 07:01:49,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794474040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:49,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034107853] [2021-06-05 07:01:49,608 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:49,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:01:49,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:49,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 07:01:49,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:50,025 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:50,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034107853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:50,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:50,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-06-05 07:01:50,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143233366] [2021-06-05 07:01:50,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:01:50,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:50,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:01:50,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:01:50,026 INFO L87 Difference]: Start difference. First operand 4211 states and 10006 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:50,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:50,917 INFO L93 Difference]: Finished difference Result 4658 states and 10935 transitions. [2021-06-05 07:01:50,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:01:50,917 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:01:50,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:50,921 INFO L225 Difference]: With dead ends: 4658 [2021-06-05 07:01:50,921 INFO L226 Difference]: Without dead ends: 4654 [2021-06-05 07:01:50,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 925.7ms TimeCoverageRelationStatistics Valid=548, Invalid=2644, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:01:50,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2021-06-05 07:01:50,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 4228. [2021-06-05 07:01:50,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.3763898746155667) internal successors, (10045), 4227 states have internal predecessors, (10045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:50,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 10045 transitions. [2021-06-05 07:01:50,959 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 10045 transitions. Word has length 35 [2021-06-05 07:01:50,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:50,960 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 10045 transitions. [2021-06-05 07:01:50,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:50,960 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 10045 transitions. [2021-06-05 07:01:50,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:01:50,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:50,963 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:51,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1363 [2021-06-05 07:01:51,163 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:51,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:51,164 INFO L82 PathProgramCache]: Analyzing trace with hash -817736003, now seen corresponding path program 93 times [2021-06-05 07:01:51,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:51,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121603043] [2021-06-05 07:01:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:51,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:51,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121603043] [2021-06-05 07:01:51,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121603043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:51,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528997742] [2021-06-05 07:01:51,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:51,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:01:51,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:51,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:01:51,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:52,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528997742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:52,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:52,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-05 07:01:52,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705815941] [2021-06-05 07:01:52,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:52,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:52,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:52,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:52,070 INFO L87 Difference]: Start difference. First operand 4228 states and 10045 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:57,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:57,583 INFO L93 Difference]: Finished difference Result 7630 states and 17556 transitions. [2021-06-05 07:01:57,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 07:01:57,583 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:01:57,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:57,591 INFO L225 Difference]: With dead ends: 7630 [2021-06-05 07:01:57,591 INFO L226 Difference]: Without dead ends: 7551 [2021-06-05 07:01:57,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7268 ImplicationChecksByTransitivity, 4971.2ms TimeCoverageRelationStatistics Valid=2403, Invalid=16779, Unknown=0, NotChecked=0, Total=19182 [2021-06-05 07:01:57,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7551 states. [2021-06-05 07:01:57,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7551 to 4786. [2021-06-05 07:01:57,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4786 states, 4785 states have (on average 2.400208986415883) internal successors, (11485), 4785 states have internal predecessors, (11485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:57,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4786 states to 4786 states and 11485 transitions. [2021-06-05 07:01:57,650 INFO L78 Accepts]: Start accepts. Automaton has 4786 states and 11485 transitions. Word has length 35 [2021-06-05 07:01:57,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:57,650 INFO L482 AbstractCegarLoop]: Abstraction has 4786 states and 11485 transitions. [2021-06-05 07:01:57,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:57,650 INFO L276 IsEmpty]: Start isEmpty. Operand 4786 states and 11485 transitions. [2021-06-05 07:01:57,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:01:57,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:57,654 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:57,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1383,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:57,855 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:57,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:57,855 INFO L82 PathProgramCache]: Analyzing trace with hash -756933699, now seen corresponding path program 94 times [2021-06-05 07:01:57,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:57,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000805825] [2021-06-05 07:01:57,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:58,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:58,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000805825] [2021-06-05 07:01:58,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000805825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:58,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185468270] [2021-06-05 07:01:58,118 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:58,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:01:58,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:58,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:01:58,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:58,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185468270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:58,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:58,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-05 07:01:58,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569462799] [2021-06-05 07:01:58,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:01:58,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:58,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:01:58,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:01:58,731 INFO L87 Difference]: Start difference. First operand 4786 states and 11485 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:03,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:03,447 INFO L93 Difference]: Finished difference Result 7197 states and 16708 transitions. [2021-06-05 07:02:03,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 07:02:03,448 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:02:03,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:03,455 INFO L225 Difference]: With dead ends: 7197 [2021-06-05 07:02:03,455 INFO L226 Difference]: Without dead ends: 7141 [2021-06-05 07:02:03,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4854 ImplicationChecksByTransitivity, 4387.0ms TimeCoverageRelationStatistics Valid=1899, Invalid=12143, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 07:02:03,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7141 states. [2021-06-05 07:02:03,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7141 to 4905. [2021-06-05 07:02:03,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4904 states have (on average 2.4074225122349104) internal successors, (11806), 4904 states have internal predecessors, (11806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 11806 transitions. [2021-06-05 07:02:03,533 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 11806 transitions. Word has length 35 [2021-06-05 07:02:03,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:03,534 INFO L482 AbstractCegarLoop]: Abstraction has 4905 states and 11806 transitions. [2021-06-05 07:02:03,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 11806 transitions. [2021-06-05 07:02:03,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:02:03,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:03,537 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:03,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1405,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:03,738 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:03,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:03,738 INFO L82 PathProgramCache]: Analyzing trace with hash -156220415, now seen corresponding path program 95 times [2021-06-05 07:02:03,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:03,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392820670] [2021-06-05 07:02:03,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:02:03,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:03,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392820670] [2021-06-05 07:02:03,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392820670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:03,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251094368] [2021-06-05 07:02:03,922 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:03,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 07:02:03,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:03,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 07:02:03,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:04,380 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:04,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251094368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:04,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:04,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 07:02:04,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014605497] [2021-06-05 07:02:04,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 07:02:04,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:04,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 07:02:04,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:02:04,381 INFO L87 Difference]: Start difference. First operand 4905 states and 11806 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:06,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:06,404 INFO L93 Difference]: Finished difference Result 6702 states and 15725 transitions. [2021-06-05 07:02:06,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 07:02:06,404 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:02:06,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:06,411 INFO L225 Difference]: With dead ends: 6702 [2021-06-05 07:02:06,411 INFO L226 Difference]: Without dead ends: 6678 [2021-06-05 07:02:06,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 2001.6ms TimeCoverageRelationStatistics Valid=1165, Invalid=4997, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 07:02:06,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6678 states. [2021-06-05 07:02:06,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6678 to 3663. [2021-06-05 07:02:06,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 2.367012561441835) internal successors, (8668), 3662 states have internal predecessors, (8668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:06,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 8668 transitions. [2021-06-05 07:02:06,470 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 8668 transitions. Word has length 35 [2021-06-05 07:02:06,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:06,470 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 8668 transitions. [2021-06-05 07:02:06,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:06,470 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 8668 transitions. [2021-06-05 07:02:06,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:02:06,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:06,473 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:06,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1425,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:06,673 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:06,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:06,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1416553917, now seen corresponding path program 96 times [2021-06-05 07:02:06,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:06,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062830995] [2021-06-05 07:02:06,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:02:06,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:06,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062830995] [2021-06-05 07:02:06,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062830995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:06,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098244748] [2021-06-05 07:02:06,885 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:06,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:02:06,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:06,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:02:06,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:07,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098244748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:07,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:07,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 07:02:07,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858041223] [2021-06-05 07:02:07,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:02:07,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:07,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:02:07,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:02:07,462 INFO L87 Difference]: Start difference. First operand 3663 states and 8668 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:10,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:10,404 INFO L93 Difference]: Finished difference Result 5512 states and 12685 transitions. [2021-06-05 07:02:10,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 07:02:10,404 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:02:10,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:10,410 INFO L225 Difference]: With dead ends: 5512 [2021-06-05 07:02:10,410 INFO L226 Difference]: Without dead ends: 5461 [2021-06-05 07:02:10,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2673 ImplicationChecksByTransitivity, 2918.1ms TimeCoverageRelationStatistics Valid=1101, Invalid=7089, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 07:02:10,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5461 states. [2021-06-05 07:02:10,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5461 to 3678. [2021-06-05 07:02:10,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3678 states, 3677 states have (on average 2.361435953222736) internal successors, (8683), 3677 states have internal predecessors, (8683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:10,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3678 states to 3678 states and 8683 transitions. [2021-06-05 07:02:10,450 INFO L78 Accepts]: Start accepts. Automaton has 3678 states and 8683 transitions. Word has length 35 [2021-06-05 07:02:10,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:10,450 INFO L482 AbstractCegarLoop]: Abstraction has 3678 states and 8683 transitions. [2021-06-05 07:02:10,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:10,450 INFO L276 IsEmpty]: Start isEmpty. Operand 3678 states and 8683 transitions. [2021-06-05 07:02:10,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 07:02:10,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:10,453 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:10,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1439 [2021-06-05 07:02:10,654 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:10,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:10,654 INFO L82 PathProgramCache]: Analyzing trace with hash -756433177, now seen corresponding path program 97 times [2021-06-05 07:02:10,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:10,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978303452] [2021-06-05 07:02:10,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:10,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:10,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978303452] [2021-06-05 07:02:10,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978303452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:10,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741006730] [2021-06-05 07:02:10,783 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:10,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 07:02:10,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:11,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741006730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:11,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:11,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-06-05 07:02:11,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818583777] [2021-06-05 07:02:11,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:02:11,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:11,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:02:11,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:02:11,214 INFO L87 Difference]: Start difference. First operand 3678 states and 8683 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:12,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:12,573 INFO L93 Difference]: Finished difference Result 4687 states and 10833 transitions. [2021-06-05 07:02:12,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:02:12,573 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 07:02:12,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:12,577 INFO L225 Difference]: With dead ends: 4687 [2021-06-05 07:02:12,577 INFO L226 Difference]: Without dead ends: 4675 [2021-06-05 07:02:12,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1260.1ms TimeCoverageRelationStatistics Valid=697, Invalid=3335, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:02:12,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4675 states. [2021-06-05 07:02:12,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4675 to 3716. [2021-06-05 07:02:12,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 2.364199192462988) internal successors, (8783), 3715 states have internal predecessors, (8783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:12,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 8783 transitions. [2021-06-05 07:02:12,613 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 8783 transitions. Word has length 35 [2021-06-05 07:02:12,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:12,613 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 8783 transitions. [2021-06-05 07:02:12,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:12,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 8783 transitions. [2021-06-05 07:02:12,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:02:12,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:12,616 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:12,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1458 [2021-06-05 07:02:12,816 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:12,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:12,816 INFO L82 PathProgramCache]: Analyzing trace with hash -869656803, now seen corresponding path program 98 times [2021-06-05 07:02:12,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:12,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785340272] [2021-06-05 07:02:12,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:12,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:12,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785340272] [2021-06-05 07:02:12,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785340272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:12,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973063095] [2021-06-05 07:02:12,918 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:12,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:02:12,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:12,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:02:12,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:13,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973063095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:13,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:13,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 07:02:13,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602809349] [2021-06-05 07:02:13,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 07:02:13,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:13,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 07:02:13,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:02:13,173 INFO L87 Difference]: Start difference. First operand 3716 states and 8783 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:14,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:14,508 INFO L93 Difference]: Finished difference Result 5434 states and 12387 transitions. [2021-06-05 07:02:14,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 07:02:14,509 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:02:14,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:14,514 INFO L225 Difference]: With dead ends: 5434 [2021-06-05 07:02:14,514 INFO L226 Difference]: Without dead ends: 5434 [2021-06-05 07:02:14,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 1191.5ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 07:02:14,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2021-06-05 07:02:14,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 4658. [2021-06-05 07:02:14,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4658 states, 4657 states have (on average 2.3474339703671894) internal successors, (10932), 4657 states have internal predecessors, (10932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:14,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 10932 transitions. [2021-06-05 07:02:14,565 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 10932 transitions. Word has length 37 [2021-06-05 07:02:14,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:14,565 INFO L482 AbstractCegarLoop]: Abstraction has 4658 states and 10932 transitions. [2021-06-05 07:02:14,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:14,566 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 10932 transitions. [2021-06-05 07:02:14,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:02:14,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:14,570 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:14,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1473,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:14,770 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:14,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:14,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1373714529, now seen corresponding path program 99 times [2021-06-05 07:02:14,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:14,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808511764] [2021-06-05 07:02:14,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:14,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:14,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808511764] [2021-06-05 07:02:14,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808511764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:14,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218550322] [2021-06-05 07:02:14,827 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:14,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 07:02:14,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:14,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:02:14,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:15,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218550322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:15,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:15,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-06-05 07:02:15,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464112077] [2021-06-05 07:02:15,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:02:15,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:15,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:02:15,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:02:15,108 INFO L87 Difference]: Start difference. First operand 4658 states and 10932 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:17,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:17,223 INFO L93 Difference]: Finished difference Result 5175 states and 11919 transitions. [2021-06-05 07:02:17,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 07:02:17,223 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:02:17,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:17,228 INFO L225 Difference]: With dead ends: 5175 [2021-06-05 07:02:17,228 INFO L226 Difference]: Without dead ends: 5171 [2021-06-05 07:02:17,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4929 ImplicationChecksByTransitivity, 1957.7ms TimeCoverageRelationStatistics Valid=3112, Invalid=10228, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 07:02:17,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5171 states. [2021-06-05 07:02:17,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5171 to 4602. [2021-06-05 07:02:17,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4602 states, 4601 states have (on average 2.344925016300804) internal successors, (10789), 4601 states have internal predecessors, (10789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:17,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 10789 transitions. [2021-06-05 07:02:17,277 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 10789 transitions. Word has length 37 [2021-06-05 07:02:17,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:17,277 INFO L482 AbstractCegarLoop]: Abstraction has 4602 states and 10789 transitions. [2021-06-05 07:02:17,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:17,277 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 10789 transitions. [2021-06-05 07:02:17,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:02:17,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:17,282 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:17,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1482,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:17,495 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:17,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:17,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1156107053, now seen corresponding path program 100 times [2021-06-05 07:02:17,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:17,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988882891] [2021-06-05 07:02:17,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:17,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:17,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988882891] [2021-06-05 07:02:17,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988882891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:17,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367125221] [2021-06-05 07:02:17,910 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:17,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:02:17,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:17,934 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-05 07:02:17,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:18,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367125221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:18,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:18,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-06-05 07:02:18,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173438576] [2021-06-05 07:02:18,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 07:02:18,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:18,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 07:02:18,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:02:18,684 INFO L87 Difference]: Start difference. First operand 4602 states and 10789 transitions. Second operand has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:20,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:20,133 INFO L93 Difference]: Finished difference Result 5204 states and 12036 transitions. [2021-06-05 07:02:20,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:02:20,134 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:02:20,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:20,138 INFO L225 Difference]: With dead ends: 5204 [2021-06-05 07:02:20,138 INFO L226 Difference]: Without dead ends: 5150 [2021-06-05 07:02:20,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1819.1ms TimeCoverageRelationStatistics Valid=371, Invalid=3051, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 07:02:20,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5150 states. [2021-06-05 07:02:20,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5150 to 4618. [2021-06-05 07:02:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4618 states, 4617 states have (on average 2.342863331167425) internal successors, (10817), 4617 states have internal predecessors, (10817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:20,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4618 states to 4618 states and 10817 transitions. [2021-06-05 07:02:20,181 INFO L78 Accepts]: Start accepts. Automaton has 4618 states and 10817 transitions. Word has length 37 [2021-06-05 07:02:20,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:20,181 INFO L482 AbstractCegarLoop]: Abstraction has 4618 states and 10817 transitions. [2021-06-05 07:02:20,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:20,181 INFO L276 IsEmpty]: Start isEmpty. Operand 4618 states and 10817 transitions. [2021-06-05 07:02:20,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:02:20,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:20,185 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:20,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1490,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:20,385 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:20,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:20,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1012654923, now seen corresponding path program 101 times [2021-06-05 07:02:20,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:20,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842406145] [2021-06-05 07:02:20,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:20,622 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:20,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:20,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842406145] [2021-06-05 07:02:20,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842406145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:20,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722241143] [2021-06-05 07:02:20,622 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:20,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:02:20,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:20,647 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 07:02:20,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:21,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722241143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:21,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:21,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2021-06-05 07:02:21,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333045119] [2021-06-05 07:02:21,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 07:02:21,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:21,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 07:02:21,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:02:21,267 INFO L87 Difference]: Start difference. First operand 4618 states and 10817 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:24,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:24,052 INFO L93 Difference]: Finished difference Result 5242 states and 12110 transitions. [2021-06-05 07:02:24,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 07:02:24,052 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:02:24,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:24,057 INFO L225 Difference]: With dead ends: 5242 [2021-06-05 07:02:24,057 INFO L226 Difference]: Without dead ends: 5242 [2021-06-05 07:02:24,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 2579.9ms TimeCoverageRelationStatistics Valid=966, Invalid=7406, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 07:02:24,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2021-06-05 07:02:24,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 4659. [2021-06-05 07:02:24,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 2.343924431086303) internal successors, (10918), 4658 states have internal predecessors, (10918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:24,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 10918 transitions. [2021-06-05 07:02:24,106 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 10918 transitions. Word has length 37 [2021-06-05 07:02:24,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:24,107 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 10918 transitions. [2021-06-05 07:02:24,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:24,107 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 10918 transitions. [2021-06-05 07:02:24,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:02:24,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:24,111 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:24,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1513 [2021-06-05 07:02:24,321 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:24,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:24,322 INFO L82 PathProgramCache]: Analyzing trace with hash -376851599, now seen corresponding path program 102 times [2021-06-05 07:02:24,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:24,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625996850] [2021-06-05 07:02:24,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:24,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:24,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625996850] [2021-06-05 07:02:24,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625996850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:24,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253874074] [2021-06-05 07:02:24,571 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:24,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:02:24,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:24,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 07:02:24,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:25,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253874074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:25,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:25,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 07:02:25,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446018443] [2021-06-05 07:02:25,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:02:25,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:25,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:02:25,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1214, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:02:25,319 INFO L87 Difference]: Start difference. First operand 4659 states and 10918 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:27,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:27,848 INFO L93 Difference]: Finished difference Result 5461 states and 12630 transitions. [2021-06-05 07:02:27,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 07:02:27,848 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:02:27,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:27,853 INFO L225 Difference]: With dead ends: 5461 [2021-06-05 07:02:27,853 INFO L226 Difference]: Without dead ends: 5461 [2021-06-05 07:02:27,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1750 ImplicationChecksByTransitivity, 2516.0ms TimeCoverageRelationStatistics Valid=635, Invalid=5845, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 07:02:27,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5461 states. [2021-06-05 07:02:27,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5461 to 4679. [2021-06-05 07:02:27,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4679 states, 4678 states have (on average 2.344164172723386) internal successors, (10966), 4678 states have internal predecessors, (10966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:27,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 10966 transitions. [2021-06-05 07:02:27,898 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 10966 transitions. Word has length 37 [2021-06-05 07:02:27,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:27,898 INFO L482 AbstractCegarLoop]: Abstraction has 4679 states and 10966 transitions. [2021-06-05 07:02:27,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:27,898 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 10966 transitions. [2021-06-05 07:02:27,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:02:27,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:27,902 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:28,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1532,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:28,103 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:28,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:28,103 INFO L82 PathProgramCache]: Analyzing trace with hash 719191221, now seen corresponding path program 103 times [2021-06-05 07:02:28,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:28,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070921054] [2021-06-05 07:02:28,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:28,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:28,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070921054] [2021-06-05 07:02:28,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070921054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:28,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944155966] [2021-06-05 07:02:28,355 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:28,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 07:02:28,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:28,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944155966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:28,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:28,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 07:02:28,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986532777] [2021-06-05 07:02:28,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:02:28,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:28,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:02:28,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:02:28,996 INFO L87 Difference]: Start difference. First operand 4679 states and 10966 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:31,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:31,728 INFO L93 Difference]: Finished difference Result 5286 states and 12264 transitions. [2021-06-05 07:02:31,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 07:02:31,728 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:02:31,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:31,733 INFO L225 Difference]: With dead ends: 5286 [2021-06-05 07:02:31,733 INFO L226 Difference]: Without dead ends: 5286 [2021-06-05 07:02:31,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 2516.6ms TimeCoverageRelationStatistics Valid=699, Invalid=6273, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 07:02:31,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5286 states. [2021-06-05 07:02:31,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5286 to 4683. [2021-06-05 07:02:31,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4683 states, 4682 states have (on average 2.344724476719351) internal successors, (10978), 4682 states have internal predecessors, (10978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4683 states to 4683 states and 10978 transitions. [2021-06-05 07:02:31,777 INFO L78 Accepts]: Start accepts. Automaton has 4683 states and 10978 transitions. Word has length 37 [2021-06-05 07:02:31,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:31,777 INFO L482 AbstractCegarLoop]: Abstraction has 4683 states and 10978 transitions. [2021-06-05 07:02:31,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:31,777 INFO L276 IsEmpty]: Start isEmpty. Operand 4683 states and 10978 transitions. [2021-06-05 07:02:31,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:02:31,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:31,781 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:31,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1551 [2021-06-05 07:02:31,981 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:31,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:31,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1551615737, now seen corresponding path program 104 times [2021-06-05 07:02:31,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:31,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865592144] [2021-06-05 07:02:31,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:32,252 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:32,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:32,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865592144] [2021-06-05 07:02:32,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865592144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:32,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309364659] [2021-06-05 07:02:32,252 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:32,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:02:32,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:32,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:02:32,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:32,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309364659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:32,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:32,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-06-05 07:02:32,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594441020] [2021-06-05 07:02:32,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 07:02:32,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:32,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 07:02:32,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:02:32,748 INFO L87 Difference]: Start difference. First operand 4683 states and 10978 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:38,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:38,650 INFO L93 Difference]: Finished difference Result 6084 states and 13860 transitions. [2021-06-05 07:02:38,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-06-05 07:02:38,650 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:02:38,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:38,655 INFO L225 Difference]: With dead ends: 6084 [2021-06-05 07:02:38,656 INFO L226 Difference]: Without dead ends: 6042 [2021-06-05 07:02:38,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7850 ImplicationChecksByTransitivity, 5189.6ms TimeCoverageRelationStatistics Valid=1871, Invalid=21081, Unknown=0, NotChecked=0, Total=22952 [2021-06-05 07:02:38,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6042 states. [2021-06-05 07:02:38,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6042 to 4770. [2021-06-05 07:02:38,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4770 states, 4769 states have (on average 2.3514363598238623) internal successors, (11214), 4769 states have internal predecessors, (11214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:38,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4770 states to 4770 states and 11214 transitions. [2021-06-05 07:02:38,717 INFO L78 Accepts]: Start accepts. Automaton has 4770 states and 11214 transitions. Word has length 37 [2021-06-05 07:02:38,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:38,717 INFO L482 AbstractCegarLoop]: Abstraction has 4770 states and 11214 transitions. [2021-06-05 07:02:38,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:38,717 INFO L276 IsEmpty]: Start isEmpty. Operand 4770 states and 11214 transitions. [2021-06-05 07:02:38,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:02:38,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:38,721 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:38,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1568 [2021-06-05 07:02:38,921 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:38,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:38,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1422873149, now seen corresponding path program 105 times [2021-06-05 07:02:38,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:38,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233186672] [2021-06-05 07:02:38,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:39,167 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:39,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:39,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233186672] [2021-06-05 07:02:39,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233186672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:39,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953351776] [2021-06-05 07:02:39,167 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:39,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:02:39,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:39,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 07:02:39,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:39,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953351776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:39,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:39,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 07:02:39,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102353497] [2021-06-05 07:02:39,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 07:02:39,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:39,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 07:02:39,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:02:39,688 INFO L87 Difference]: Start difference. First operand 4770 states and 11214 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:43,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:43,899 INFO L93 Difference]: Finished difference Result 6513 states and 14860 transitions. [2021-06-05 07:02:43,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 07:02:43,899 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:02:43,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:43,906 INFO L225 Difference]: With dead ends: 6513 [2021-06-05 07:02:43,906 INFO L226 Difference]: Without dead ends: 6447 [2021-06-05 07:02:43,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4973 ImplicationChecksByTransitivity, 3764.1ms TimeCoverageRelationStatistics Valid=1486, Invalid=12794, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 07:02:43,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6447 states. [2021-06-05 07:02:43,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6447 to 4842. [2021-06-05 07:02:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4842 states, 4841 states have (on average 2.3462094608551953) internal successors, (11358), 4841 states have internal predecessors, (11358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:43,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4842 states to 4842 states and 11358 transitions. [2021-06-05 07:02:43,964 INFO L78 Accepts]: Start accepts. Automaton has 4842 states and 11358 transitions. Word has length 37 [2021-06-05 07:02:43,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:43,964 INFO L482 AbstractCegarLoop]: Abstraction has 4842 states and 11358 transitions. [2021-06-05 07:02:43,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:43,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4842 states and 11358 transitions. [2021-06-05 07:02:43,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:02:43,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:43,969 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:44,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1588 [2021-06-05 07:02:44,169 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:44,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:44,170 INFO L82 PathProgramCache]: Analyzing trace with hash -196919433, now seen corresponding path program 106 times [2021-06-05 07:02:44,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:44,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327743792] [2021-06-05 07:02:44,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:44,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:44,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:44,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327743792] [2021-06-05 07:02:44,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327743792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:44,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273019117] [2021-06-05 07:02:44,450 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:44,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:02:44,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:44,473 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 07:02:44,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:45,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273019117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:45,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:45,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-05 07:02:45,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635550514] [2021-06-05 07:02:45,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:02:45,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:45,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:02:45,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:02:45,099 INFO L87 Difference]: Start difference. First operand 4842 states and 11358 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:46,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:46,959 INFO L93 Difference]: Finished difference Result 5247 states and 12151 transitions. [2021-06-05 07:02:46,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:02:46,959 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:02:46,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:46,964 INFO L225 Difference]: With dead ends: 5247 [2021-06-05 07:02:46,964 INFO L226 Difference]: Without dead ends: 5247 [2021-06-05 07:02:46,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1885.0ms TimeCoverageRelationStatistics Valid=444, Invalid=3588, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:02:46,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5247 states. [2021-06-05 07:02:47,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5247 to 4860. [2021-06-05 07:02:47,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4860 states, 4859 states have (on average 2.3461617616793577) internal successors, (11400), 4859 states have internal predecessors, (11400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:47,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4860 states to 4860 states and 11400 transitions. [2021-06-05 07:02:47,017 INFO L78 Accepts]: Start accepts. Automaton has 4860 states and 11400 transitions. Word has length 37 [2021-06-05 07:02:47,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:47,018 INFO L482 AbstractCegarLoop]: Abstraction has 4860 states and 11400 transitions. [2021-06-05 07:02:47,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:47,018 INFO L276 IsEmpty]: Start isEmpty. Operand 4860 states and 11400 transitions. [2021-06-05 07:02:47,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:02:47,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:47,022 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:47,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1608,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:47,223 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:47,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:47,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1929285887, now seen corresponding path program 107 times [2021-06-05 07:02:47,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:47,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727285508] [2021-06-05 07:02:47,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:47,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:47,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727285508] [2021-06-05 07:02:47,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727285508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:47,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819191312] [2021-06-05 07:02:47,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:47,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:02:47,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:47,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 07:02:47,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:48,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819191312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:48,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:48,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-05 07:02:48,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12574169] [2021-06-05 07:02:48,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:02:48,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:48,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:02:48,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:02:48,179 INFO L87 Difference]: Start difference. First operand 4860 states and 11400 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:50,644 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-06-05 07:02:51,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:51,155 INFO L93 Difference]: Finished difference Result 5227 states and 12121 transitions. [2021-06-05 07:02:51,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 07:02:51,155 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:02:51,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:51,159 INFO L225 Difference]: With dead ends: 5227 [2021-06-05 07:02:51,159 INFO L226 Difference]: Without dead ends: 5227 [2021-06-05 07:02:51,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 2854.6ms TimeCoverageRelationStatistics Valid=669, Invalid=5183, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 07:02:51,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5227 states. [2021-06-05 07:02:51,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5227 to 4864. [2021-06-05 07:02:51,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4864 states, 4863 states have (on average 2.346699568167798) internal successors, (11412), 4863 states have internal predecessors, (11412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:51,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4864 states to 4864 states and 11412 transitions. [2021-06-05 07:02:51,205 INFO L78 Accepts]: Start accepts. Automaton has 4864 states and 11412 transitions. Word has length 37 [2021-06-05 07:02:51,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:51,205 INFO L482 AbstractCegarLoop]: Abstraction has 4864 states and 11412 transitions. [2021-06-05 07:02:51,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:51,205 INFO L276 IsEmpty]: Start isEmpty. Operand 4864 states and 11412 transitions. [2021-06-05 07:02:51,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:02:51,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:51,209 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:51,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1629,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:51,409 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:51,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:51,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1533256893, now seen corresponding path program 108 times [2021-06-05 07:02:51,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:51,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938609185] [2021-06-05 07:02:51,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:51,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:51,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938609185] [2021-06-05 07:02:51,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938609185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:51,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254725016] [2021-06-05 07:02:51,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:51,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:02:51,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:51,712 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 07:02:51,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:52,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254725016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:52,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:52,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-05 07:02:52,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958681238] [2021-06-05 07:02:52,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:02:52,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:52,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:02:52,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:02:52,413 INFO L87 Difference]: Start difference. First operand 4864 states and 11412 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:55,137 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-06-05 07:02:55,314 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-06-05 07:02:55,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:55,477 INFO L93 Difference]: Finished difference Result 5273 states and 12215 transitions. [2021-06-05 07:02:55,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 07:02:55,478 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:02:55,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:55,482 INFO L225 Difference]: With dead ends: 5273 [2021-06-05 07:02:55,482 INFO L226 Difference]: Without dead ends: 5273 [2021-06-05 07:02:55,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1911 ImplicationChecksByTransitivity, 2984.1ms TimeCoverageRelationStatistics Valid=786, Invalid=5856, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 07:02:55,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5273 states. [2021-06-05 07:02:55,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5273 to 4870. [2021-06-05 07:02:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4870 states, 4869 states have (on average 2.347915383035531) internal successors, (11432), 4869 states have internal predecessors, (11432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:55,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4870 states to 4870 states and 11432 transitions. [2021-06-05 07:02:55,535 INFO L78 Accepts]: Start accepts. Automaton has 4870 states and 11432 transitions. Word has length 37 [2021-06-05 07:02:55,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:55,535 INFO L482 AbstractCegarLoop]: Abstraction has 4870 states and 11432 transitions. [2021-06-05 07:02:55,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:55,535 INFO L276 IsEmpty]: Start isEmpty. Operand 4870 states and 11432 transitions. [2021-06-05 07:02:55,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:02:55,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:55,540 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:55,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1650 [2021-06-05 07:02:55,753 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:55,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:55,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1661999481, now seen corresponding path program 109 times [2021-06-05 07:02:55,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:55,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357372137] [2021-06-05 07:02:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:56,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:56,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357372137] [2021-06-05 07:02:56,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357372137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:56,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213330537] [2021-06-05 07:02:56,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:56,076 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 07:02:56,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:56,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213330537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:56,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:56,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-05 07:02:56,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042362932] [2021-06-05 07:02:56,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:02:56,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:56,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:02:56,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:02:56,800 INFO L87 Difference]: Start difference. First operand 4870 states and 11432 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:00,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:00,039 INFO L93 Difference]: Finished difference Result 5834 states and 13420 transitions. [2021-06-05 07:03:00,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 07:03:00,039 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:03:00,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:00,044 INFO L225 Difference]: With dead ends: 5834 [2021-06-05 07:03:00,044 INFO L226 Difference]: Without dead ends: 5834 [2021-06-05 07:03:00,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2240 ImplicationChecksByTransitivity, 3196.7ms TimeCoverageRelationStatistics Valid=930, Invalid=6552, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 07:03:00,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5834 states. [2021-06-05 07:03:00,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5834 to 4915. [2021-06-05 07:03:00,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4915 states, 4914 states have (on average 2.349409849409849) internal successors, (11545), 4914 states have internal predecessors, (11545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:00,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4915 states to 4915 states and 11545 transitions. [2021-06-05 07:03:00,100 INFO L78 Accepts]: Start accepts. Automaton has 4915 states and 11545 transitions. Word has length 37 [2021-06-05 07:03:00,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:00,100 INFO L482 AbstractCegarLoop]: Abstraction has 4915 states and 11545 transitions. [2021-06-05 07:03:00,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:00,101 INFO L276 IsEmpty]: Start isEmpty. Operand 4915 states and 11545 transitions. [2021-06-05 07:03:00,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:03:00,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:00,105 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:00,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1670,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:00,305 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:00,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:00,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1011930511, now seen corresponding path program 110 times [2021-06-05 07:03:00,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:00,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915001573] [2021-06-05 07:03:00,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:00,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:00,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915001573] [2021-06-05 07:03:00,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915001573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:00,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670627495] [2021-06-05 07:03:00,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:00,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:03:00,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:00,625 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 07:03:00,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:01,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670627495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:01,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:01,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-06-05 07:03:01,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38733976] [2021-06-05 07:03:01,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 07:03:01,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:01,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 07:03:01,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:03:01,221 INFO L87 Difference]: Start difference. First operand 4915 states and 11545 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:04,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:04,236 INFO L93 Difference]: Finished difference Result 5198 states and 12074 transitions. [2021-06-05 07:03:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 07:03:04,236 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:03:04,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:04,241 INFO L225 Difference]: With dead ends: 5198 [2021-06-05 07:03:04,241 INFO L226 Difference]: Without dead ends: 5194 [2021-06-05 07:03:04,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 2798.9ms TimeCoverageRelationStatistics Valid=695, Invalid=5467, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 07:03:04,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-06-05 07:03:04,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 4902. [2021-06-05 07:03:04,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4902 states, 4901 states have (on average 2.3472760661089573) internal successors, (11504), 4901 states have internal predecessors, (11504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:04,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4902 states to 4902 states and 11504 transitions. [2021-06-05 07:03:04,293 INFO L78 Accepts]: Start accepts. Automaton has 4902 states and 11504 transitions. Word has length 37 [2021-06-05 07:03:04,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:04,293 INFO L482 AbstractCegarLoop]: Abstraction has 4902 states and 11504 transitions. [2021-06-05 07:03:04,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:04,293 INFO L276 IsEmpty]: Start isEmpty. Operand 4902 states and 11504 transitions. [2021-06-05 07:03:04,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:03:04,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:04,298 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:04,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1695 [2021-06-05 07:03:04,498 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:04,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:04,498 INFO L82 PathProgramCache]: Analyzing trace with hash 783554167, now seen corresponding path program 111 times [2021-06-05 07:03:04,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:04,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907622565] [2021-06-05 07:03:04,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:04,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:04,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907622565] [2021-06-05 07:03:04,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907622565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:04,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728708196] [2021-06-05 07:03:04,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:04,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:03:04,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:04,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:03:04,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:05,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728708196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:05,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:05,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2021-06-05 07:03:05,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382067168] [2021-06-05 07:03:05,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 07:03:05,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:05,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 07:03:05,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:03:05,148 INFO L87 Difference]: Start difference. First operand 4902 states and 11504 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:07,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:07,987 INFO L93 Difference]: Finished difference Result 6564 states and 15090 transitions. [2021-06-05 07:03:07,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 07:03:07,988 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:03:07,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:07,993 INFO L225 Difference]: With dead ends: 6564 [2021-06-05 07:03:07,993 INFO L226 Difference]: Without dead ends: 6360 [2021-06-05 07:03:07,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2172 ImplicationChecksByTransitivity, 2385.7ms TimeCoverageRelationStatistics Valid=758, Invalid=7432, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 07:03:07,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6360 states. [2021-06-05 07:03:08,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6360 to 5277. [2021-06-05 07:03:08,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5277 states, 5276 states have (on average 2.3421152388172857) internal successors, (12357), 5276 states have internal predecessors, (12357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:08,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5277 states to 5277 states and 12357 transitions. [2021-06-05 07:03:08,051 INFO L78 Accepts]: Start accepts. Automaton has 5277 states and 12357 transitions. Word has length 37 [2021-06-05 07:03:08,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:08,051 INFO L482 AbstractCegarLoop]: Abstraction has 5277 states and 12357 transitions. [2021-06-05 07:03:08,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:08,051 INFO L276 IsEmpty]: Start isEmpty. Operand 5277 states and 12357 transitions. [2021-06-05 07:03:08,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:03:08,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:08,056 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:08,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1715 [2021-06-05 07:03:08,257 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:08,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:08,257 INFO L82 PathProgramCache]: Analyzing trace with hash -136117129, now seen corresponding path program 112 times [2021-06-05 07:03:08,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:08,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577821794] [2021-06-05 07:03:08,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:08,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:08,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577821794] [2021-06-05 07:03:08,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577821794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:08,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331796968] [2021-06-05 07:03:08,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:08,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:03:08,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:08,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 07:03:08,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:09,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331796968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:09,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:09,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-06-05 07:03:09,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959626961] [2021-06-05 07:03:09,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 07:03:09,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:09,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 07:03:09,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:03:09,065 INFO L87 Difference]: Start difference. First operand 5277 states and 12357 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:11,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:11,490 INFO L93 Difference]: Finished difference Result 7190 states and 16637 transitions. [2021-06-05 07:03:11,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 07:03:11,491 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:03:11,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:11,497 INFO L225 Difference]: With dead ends: 7190 [2021-06-05 07:03:11,497 INFO L226 Difference]: Without dead ends: 7127 [2021-06-05 07:03:11,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 2260.5ms TimeCoverageRelationStatistics Valid=766, Invalid=4784, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 07:03:11,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7127 states. [2021-06-05 07:03:11,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7127 to 5386. [2021-06-05 07:03:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5386 states, 5385 states have (on average 2.337418755803157) internal successors, (12587), 5385 states have internal predecessors, (12587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5386 states to 5386 states and 12587 transitions. [2021-06-05 07:03:11,555 INFO L78 Accepts]: Start accepts. Automaton has 5386 states and 12587 transitions. Word has length 37 [2021-06-05 07:03:11,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:11,555 INFO L482 AbstractCegarLoop]: Abstraction has 5386 states and 12587 transitions. [2021-06-05 07:03:11,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 5386 states and 12587 transitions. [2021-06-05 07:03:11,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:03:11,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:11,559 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:11,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-06-05 07:03:11,760 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:11,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:11,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1645417915, now seen corresponding path program 113 times [2021-06-05 07:03:11,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:11,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099301481] [2021-06-05 07:03:11,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:11,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:11,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099301481] [2021-06-05 07:03:11,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099301481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:11,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349276539] [2021-06-05 07:03:11,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:12,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:03:12,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:12,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 07:03:12,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:12,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349276539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:12,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:12,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-06-05 07:03:12,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522868770] [2021-06-05 07:03:12,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 07:03:12,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:12,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 07:03:12,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:03:12,586 INFO L87 Difference]: Start difference. First operand 5386 states and 12587 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:15,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:15,649 INFO L93 Difference]: Finished difference Result 7812 states and 17955 transitions. [2021-06-05 07:03:15,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 07:03:15,649 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:03:15,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:15,656 INFO L225 Difference]: With dead ends: 7812 [2021-06-05 07:03:15,656 INFO L226 Difference]: Without dead ends: 7773 [2021-06-05 07:03:15,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2156 ImplicationChecksByTransitivity, 2930.3ms TimeCoverageRelationStatistics Valid=993, Invalid=6147, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 07:03:15,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7773 states. [2021-06-05 07:03:15,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7773 to 5464. [2021-06-05 07:03:15,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5464 states, 5463 states have (on average 2.33479773018488) internal successors, (12755), 5463 states have internal predecessors, (12755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:15,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5464 states to 5464 states and 12755 transitions. [2021-06-05 07:03:15,714 INFO L78 Accepts]: Start accepts. Automaton has 5464 states and 12755 transitions. Word has length 37 [2021-06-05 07:03:15,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:15,714 INFO L482 AbstractCegarLoop]: Abstraction has 5464 states and 12755 transitions. [2021-06-05 07:03:15,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:15,714 INFO L276 IsEmpty]: Start isEmpty. Operand 5464 states and 12755 transitions. [2021-06-05 07:03:15,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:03:15,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:15,718 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:15,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1754 [2021-06-05 07:03:15,924 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:15,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:15,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1356769279, now seen corresponding path program 114 times [2021-06-05 07:03:15,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:15,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20152190] [2021-06-05 07:03:15,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:16,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:16,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20152190] [2021-06-05 07:03:16,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20152190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:16,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419077821] [2021-06-05 07:03:16,191 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:16,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:03:16,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:16,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 07:03:16,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:16,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419077821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:16,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:16,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2021-06-05 07:03:16,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727188073] [2021-06-05 07:03:16,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:03:16,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:16,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:03:16,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:03:16,749 INFO L87 Difference]: Start difference. First operand 5464 states and 12755 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:20,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:20,594 INFO L93 Difference]: Finished difference Result 7788 states and 17905 transitions. [2021-06-05 07:03:20,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 07:03:20,595 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:03:20,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:20,602 INFO L225 Difference]: With dead ends: 7788 [2021-06-05 07:03:20,602 INFO L226 Difference]: Without dead ends: 7746 [2021-06-05 07:03:20,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2989 ImplicationChecksByTransitivity, 3520.4ms TimeCoverageRelationStatistics Valid=1316, Invalid=7614, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 07:03:20,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7746 states. [2021-06-05 07:03:20,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7746 to 5484. [2021-06-05 07:03:20,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5484 states, 5483 states have (on average 2.335400328287434) internal successors, (12805), 5483 states have internal predecessors, (12805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:20,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5484 states to 5484 states and 12805 transitions. [2021-06-05 07:03:20,667 INFO L78 Accepts]: Start accepts. Automaton has 5484 states and 12805 transitions. Word has length 37 [2021-06-05 07:03:20,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:20,667 INFO L482 AbstractCegarLoop]: Abstraction has 5484 states and 12805 transitions. [2021-06-05 07:03:20,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:20,668 INFO L276 IsEmpty]: Start isEmpty. Operand 5484 states and 12805 transitions. [2021-06-05 07:03:20,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:03:20,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:20,672 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:20,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1774,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:20,872 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:20,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1945861701, now seen corresponding path program 115 times [2021-06-05 07:03:20,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:20,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558202774] [2021-06-05 07:03:20,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:21,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:21,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558202774] [2021-06-05 07:03:21,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558202774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:21,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342249471] [2021-06-05 07:03:21,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:21,115 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 07:03:21,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:21,686 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:21,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342249471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:21,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:21,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-05 07:03:21,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303185092] [2021-06-05 07:03:21,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 07:03:21,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:21,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 07:03:21,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:03:21,687 INFO L87 Difference]: Start difference. First operand 5484 states and 12805 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:24,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:24,233 INFO L93 Difference]: Finished difference Result 5965 states and 13762 transitions. [2021-06-05 07:03:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 07:03:24,233 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:03:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:24,238 INFO L225 Difference]: With dead ends: 5965 [2021-06-05 07:03:24,238 INFO L226 Difference]: Without dead ends: 5935 [2021-06-05 07:03:24,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2272.9ms TimeCoverageRelationStatistics Valid=658, Invalid=6148, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 07:03:24,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5935 states. [2021-06-05 07:03:24,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5935 to 5492. [2021-06-05 07:03:24,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5492 states, 5491 states have (on average 2.3352759060280457) internal successors, (12823), 5491 states have internal predecessors, (12823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:24,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5492 states to 5492 states and 12823 transitions. [2021-06-05 07:03:24,299 INFO L78 Accepts]: Start accepts. Automaton has 5492 states and 12823 transitions. Word has length 37 [2021-06-05 07:03:24,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:24,299 INFO L482 AbstractCegarLoop]: Abstraction has 5492 states and 12823 transitions. [2021-06-05 07:03:24,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:24,299 INFO L276 IsEmpty]: Start isEmpty. Operand 5492 states and 12823 transitions. [2021-06-05 07:03:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:03:24,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:24,303 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:24,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1794 [2021-06-05 07:03:24,504 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:24,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:24,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1113437185, now seen corresponding path program 116 times [2021-06-05 07:03:24,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:24,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586715794] [2021-06-05 07:03:24,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:24,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:24,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586715794] [2021-06-05 07:03:24,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586715794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:24,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484339249] [2021-06-05 07:03:24,702 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:24,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:03:24,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:24,726 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 07:03:24,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:25,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484339249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:25,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:25,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-05 07:03:25,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991503951] [2021-06-05 07:03:25,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 07:03:25,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:25,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 07:03:25,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:03:25,341 INFO L87 Difference]: Start difference. First operand 5492 states and 12823 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:28,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:28,293 INFO L93 Difference]: Finished difference Result 5816 states and 13464 transitions. [2021-06-05 07:03:28,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 07:03:28,294 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:03:28,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:28,298 INFO L225 Difference]: With dead ends: 5816 [2021-06-05 07:03:28,298 INFO L226 Difference]: Without dead ends: 5798 [2021-06-05 07:03:28,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2285 ImplicationChecksByTransitivity, 2689.6ms TimeCoverageRelationStatistics Valid=700, Invalid=7132, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 07:03:28,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2021-06-05 07:03:28,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 5502. [2021-06-05 07:03:28,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5502 states, 5501 states have (on average 2.335393564806399) internal successors, (12847), 5501 states have internal predecessors, (12847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:28,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5502 states to 5502 states and 12847 transitions. [2021-06-05 07:03:28,351 INFO L78 Accepts]: Start accepts. Automaton has 5502 states and 12847 transitions. Word has length 37 [2021-06-05 07:03:28,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:28,351 INFO L482 AbstractCegarLoop]: Abstraction has 5502 states and 12847 transitions. [2021-06-05 07:03:28,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:28,351 INFO L276 IsEmpty]: Start isEmpty. Operand 5502 states and 12847 transitions. [2021-06-05 07:03:28,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:03:28,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:28,356 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:28,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1808 [2021-06-05 07:03:28,572 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:28,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:28,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1242179773, now seen corresponding path program 117 times [2021-06-05 07:03:28,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:28,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993325703] [2021-06-05 07:03:28,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:28,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:28,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993325703] [2021-06-05 07:03:28,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993325703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:28,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92398702] [2021-06-05 07:03:28,776 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:28,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:03:28,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:28,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:03:28,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:29,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92398702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:29,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:29,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-05 07:03:29,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878237919] [2021-06-05 07:03:29,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:03:29,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:29,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:03:29,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1096, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:03:29,284 INFO L87 Difference]: Start difference. First operand 5502 states and 12847 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:40,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:40,761 INFO L93 Difference]: Finished difference Result 7773 states and 17514 transitions. [2021-06-05 07:03:40,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2021-06-05 07:03:40,761 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:03:40,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:40,767 INFO L225 Difference]: With dead ends: 7773 [2021-06-05 07:03:40,767 INFO L226 Difference]: Without dead ends: 7761 [2021-06-05 07:03:40,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22159 ImplicationChecksByTransitivity, 9970.2ms TimeCoverageRelationStatistics Valid=4256, Invalid=51676, Unknown=0, NotChecked=0, Total=55932 [2021-06-05 07:03:40,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7761 states. [2021-06-05 07:03:40,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7761 to 5514. [2021-06-05 07:03:40,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5514 states, 5513 states have (on average 2.3359332486849267) internal successors, (12878), 5513 states have internal predecessors, (12878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:40,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5514 states to 5514 states and 12878 transitions. [2021-06-05 07:03:40,828 INFO L78 Accepts]: Start accepts. Automaton has 5514 states and 12878 transitions. Word has length 37 [2021-06-05 07:03:40,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:40,828 INFO L482 AbstractCegarLoop]: Abstraction has 5514 states and 12878 transitions. [2021-06-05 07:03:40,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:40,828 INFO L276 IsEmpty]: Start isEmpty. Operand 5514 states and 12878 transitions. [2021-06-05 07:03:40,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:03:40,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:40,833 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:41,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1823,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:41,034 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:41,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:41,034 INFO L82 PathProgramCache]: Analyzing trace with hash -592110803, now seen corresponding path program 118 times [2021-06-05 07:03:41,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:41,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562652848] [2021-06-05 07:03:41,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:41,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:41,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562652848] [2021-06-05 07:03:41,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562652848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:41,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252487928] [2021-06-05 07:03:41,238 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:41,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:03:41,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:41,262 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 07:03:41,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:41,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252487928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:41,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:41,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-05 07:03:41,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493984113] [2021-06-05 07:03:41,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 07:03:41,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:41,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 07:03:41,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:03:41,885 INFO L87 Difference]: Start difference. First operand 5514 states and 12878 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:44,436 INFO L93 Difference]: Finished difference Result 5766 states and 13384 transitions. [2021-06-05 07:03:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 07:03:44,437 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:03:44,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:44,442 INFO L225 Difference]: With dead ends: 5766 [2021-06-05 07:03:44,442 INFO L226 Difference]: Without dead ends: 5766 [2021-06-05 07:03:44,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 2463.4ms TimeCoverageRelationStatistics Valid=572, Invalid=4978, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 07:03:44,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5766 states. [2021-06-05 07:03:44,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5766 to 5511. [2021-06-05 07:03:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5511 states, 5510 states have (on average 2.3364791288566242) internal successors, (12874), 5510 states have internal predecessors, (12874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5511 states to 5511 states and 12874 transitions. [2021-06-05 07:03:44,498 INFO L78 Accepts]: Start accepts. Automaton has 5511 states and 12874 transitions. Word has length 37 [2021-06-05 07:03:44,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:44,498 INFO L482 AbstractCegarLoop]: Abstraction has 5511 states and 12874 transitions. [2021-06-05 07:03:44,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:44,498 INFO L276 IsEmpty]: Start isEmpty. Operand 5511 states and 12874 transitions. [2021-06-05 07:03:44,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:03:44,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:44,503 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:44,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1847 [2021-06-05 07:03:44,704 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:44,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:44,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1231736695, now seen corresponding path program 119 times [2021-06-05 07:03:44,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:44,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549433420] [2021-06-05 07:03:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:44,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:44,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549433420] [2021-06-05 07:03:44,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549433420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:44,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731982253] [2021-06-05 07:03:44,918 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:44,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:03:44,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:44,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 07:03:44,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:45,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731982253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:45,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:45,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 07:03:45,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989761283] [2021-06-05 07:03:45,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:03:45,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:45,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:03:45,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1241, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:03:45,645 INFO L87 Difference]: Start difference. First operand 5511 states and 12874 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:49,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:49,814 INFO L93 Difference]: Finished difference Result 6342 states and 14521 transitions. [2021-06-05 07:03:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 07:03:49,814 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:03:49,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:49,818 INFO L225 Difference]: With dead ends: 6342 [2021-06-05 07:03:49,818 INFO L226 Difference]: Without dead ends: 6285 [2021-06-05 07:03:49,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3248 ImplicationChecksByTransitivity, 3726.7ms TimeCoverageRelationStatistics Valid=895, Invalid=10877, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 07:03:49,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6285 states. [2021-06-05 07:03:49,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6285 to 5541. [2021-06-05 07:03:49,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5541 states, 5540 states have (on average 2.334657039711191) internal successors, (12934), 5540 states have internal predecessors, (12934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:49,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5541 states to 5541 states and 12934 transitions. [2021-06-05 07:03:49,866 INFO L78 Accepts]: Start accepts. Automaton has 5541 states and 12934 transitions. Word has length 37 [2021-06-05 07:03:49,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:49,866 INFO L482 AbstractCegarLoop]: Abstraction has 5541 states and 12934 transitions. [2021-06-05 07:03:49,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:49,866 INFO L276 IsEmpty]: Start isEmpty. Operand 5541 states and 12934 transitions. [2021-06-05 07:03:49,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:03:49,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:49,870 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:03:50,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1861 [2021-06-05 07:03:50,071 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:50,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:50,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1935418623, now seen corresponding path program 120 times [2021-06-05 07:03:50,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:50,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925338777] [2021-06-05 07:03:50,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:50,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:50,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925338777] [2021-06-05 07:03:50,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925338777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:50,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418313125] [2021-06-05 07:03:50,287 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:50,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:03:50,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:50,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 07:03:50,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:50,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418313125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:50,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:50,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-06-05 07:03:50,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191397424] [2021-06-05 07:03:50,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 07:03:50,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:50,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 07:03:50,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:03:50,812 INFO L87 Difference]: Start difference. First operand 5541 states and 12934 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:05,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:05,040 INFO L93 Difference]: Finished difference Result 8099 states and 18208 transitions. [2021-06-05 07:04:05,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2021-06-05 07:04:05,040 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:04:05,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:05,046 INFO L225 Difference]: With dead ends: 8099 [2021-06-05 07:04:05,046 INFO L226 Difference]: Without dead ends: 8087 [2021-06-05 07:04:05,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37586 ImplicationChecksByTransitivity, 12583.8ms TimeCoverageRelationStatistics Valid=6402, Invalid=84500, Unknown=0, NotChecked=0, Total=90902 [2021-06-05 07:04:05,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8087 states. [2021-06-05 07:04:05,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8087 to 5547. [2021-06-05 07:04:05,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5547 states, 5546 states have (on average 2.3348359177785794) internal successors, (12949), 5546 states have internal predecessors, (12949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:05,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5547 states to 5547 states and 12949 transitions. [2021-06-05 07:04:05,110 INFO L78 Accepts]: Start accepts. Automaton has 5547 states and 12949 transitions. Word has length 37 [2021-06-05 07:04:05,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:05,111 INFO L482 AbstractCegarLoop]: Abstraction has 5547 states and 12949 transitions. [2021-06-05 07:04:05,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:05,111 INFO L276 IsEmpty]: Start isEmpty. Operand 5547 states and 12949 transitions. [2021-06-05 07:04:05,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:04:05,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:05,115 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:05,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1881 [2021-06-05 07:04:05,317 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:05,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:05,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1709479703, now seen corresponding path program 121 times [2021-06-05 07:04:05,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:05,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329467870] [2021-06-05 07:04:05,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:05,547 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:05,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:05,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329467870] [2021-06-05 07:04:05,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329467870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:05,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342909243] [2021-06-05 07:04:05,547 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:05,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 07:04:05,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:06,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342909243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:06,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:06,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 07:04:06,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622178379] [2021-06-05 07:04:06,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 07:04:06,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:06,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 07:04:06,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:04:06,248 INFO L87 Difference]: Start difference. First operand 5547 states and 12949 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:09,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:09,651 INFO L93 Difference]: Finished difference Result 6293 states and 14448 transitions. [2021-06-05 07:04:09,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 07:04:09,651 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:04:09,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:09,658 INFO L225 Difference]: With dead ends: 6293 [2021-06-05 07:04:09,658 INFO L226 Difference]: Without dead ends: 6284 [2021-06-05 07:04:09,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2326 ImplicationChecksByTransitivity, 2976.7ms TimeCoverageRelationStatistics Valid=749, Invalid=7623, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 07:04:09,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6284 states. [2021-06-05 07:04:09,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6284 to 5583. [2021-06-05 07:04:09,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 5582 states have (on average 2.3350053744177712) internal successors, (13034), 5582 states have internal predecessors, (13034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 13034 transitions. [2021-06-05 07:04:09,739 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 13034 transitions. Word has length 37 [2021-06-05 07:04:09,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:09,739 INFO L482 AbstractCegarLoop]: Abstraction has 5583 states and 13034 transitions. [2021-06-05 07:04:09,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:09,739 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 13034 transitions. [2021-06-05 07:04:09,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:04:09,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:09,744 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:09,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1910 [2021-06-05 07:04:09,945 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:09,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:09,945 INFO L82 PathProgramCache]: Analyzing trace with hash 956173311, now seen corresponding path program 122 times [2021-06-05 07:04:09,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:09,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474379935] [2021-06-05 07:04:09,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:10,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:10,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474379935] [2021-06-05 07:04:10,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474379935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:10,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137046678] [2021-06-05 07:04:10,157 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:10,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:10,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:10,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 07:04:10,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:10,714 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:10,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137046678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:10,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:10,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-06-05 07:04:10,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951139653] [2021-06-05 07:04:10,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 07:04:10,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:10,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 07:04:10,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:04:10,715 INFO L87 Difference]: Start difference. First operand 5583 states and 13034 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:14,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:14,275 INFO L93 Difference]: Finished difference Result 7671 states and 17703 transitions. [2021-06-05 07:04:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 07:04:14,275 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:04:14,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:14,282 INFO L225 Difference]: With dead ends: 7671 [2021-06-05 07:04:14,282 INFO L226 Difference]: Without dead ends: 7636 [2021-06-05 07:04:14,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 3333.3ms TimeCoverageRelationStatistics Valid=1319, Invalid=6871, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 07:04:14,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7636 states. [2021-06-05 07:04:14,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7636 to 5598. [2021-06-05 07:04:14,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5598 states, 5597 states have (on average 2.3353582276219402) internal successors, (13071), 5597 states have internal predecessors, (13071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:14,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5598 states to 5598 states and 13071 transitions. [2021-06-05 07:04:14,346 INFO L78 Accepts]: Start accepts. Automaton has 5598 states and 13071 transitions. Word has length 37 [2021-06-05 07:04:14,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:14,346 INFO L482 AbstractCegarLoop]: Abstraction has 5598 states and 13071 transitions. [2021-06-05 07:04:14,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:14,346 INFO L276 IsEmpty]: Start isEmpty. Operand 5598 states and 13071 transitions. [2021-06-05 07:04:14,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:04:14,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:14,351 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:14,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1928,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:14,551 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:14,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:14,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1447643043, now seen corresponding path program 123 times [2021-06-05 07:04:14,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:14,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689891857] [2021-06-05 07:04:14,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:14,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:14,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689891857] [2021-06-05 07:04:14,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689891857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:14,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587794539] [2021-06-05 07:04:14,721 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:14,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 07:04:14,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:14,748 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 07:04:14,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:04:15,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587794539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:15,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:15,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2021-06-05 07:04:15,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749142701] [2021-06-05 07:04:15,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 07:04:15,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:15,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 07:04:15,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:04:15,154 INFO L87 Difference]: Start difference. First operand 5598 states and 13071 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:15,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:15,741 INFO L93 Difference]: Finished difference Result 6845 states and 15895 transitions. [2021-06-05 07:04:15,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:04:15,741 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:04:15,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:15,748 INFO L225 Difference]: With dead ends: 6845 [2021-06-05 07:04:15,749 INFO L226 Difference]: Without dead ends: 6841 [2021-06-05 07:04:15,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 755.2ms TimeCoverageRelationStatistics Valid=406, Invalid=1664, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 07:04:15,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6841 states. [2021-06-05 07:04:15,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6841 to 5631. [2021-06-05 07:04:15,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5631 states, 5630 states have (on average 2.3408525754884546) internal successors, (13179), 5630 states have internal predecessors, (13179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:15,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5631 states to 5631 states and 13179 transitions. [2021-06-05 07:04:15,809 INFO L78 Accepts]: Start accepts. Automaton has 5631 states and 13179 transitions. Word has length 37 [2021-06-05 07:04:15,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:15,810 INFO L482 AbstractCegarLoop]: Abstraction has 5631 states and 13179 transitions. [2021-06-05 07:04:15,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:15,810 INFO L276 IsEmpty]: Start isEmpty. Operand 5631 states and 13179 transitions. [2021-06-05 07:04:15,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:04:15,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:15,814 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:16,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1950 [2021-06-05 07:04:16,016 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:16,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:16,016 INFO L82 PathProgramCache]: Analyzing trace with hash 2142478777, now seen corresponding path program 124 times [2021-06-05 07:04:16,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:16,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566246513] [2021-06-05 07:04:16,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:16,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:16,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566246513] [2021-06-05 07:04:16,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566246513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:16,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246584327] [2021-06-05 07:04:16,247 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:16,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:16,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:16,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 07:04:16,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:16,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246584327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:16,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:16,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2021-06-05 07:04:16,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377711908] [2021-06-05 07:04:16,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:04:16,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:16,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:04:16,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:04:16,823 INFO L87 Difference]: Start difference. First operand 5631 states and 13179 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:20,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:20,295 INFO L93 Difference]: Finished difference Result 8549 states and 19665 transitions. [2021-06-05 07:04:20,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 07:04:20,295 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:04:20,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:20,303 INFO L225 Difference]: With dead ends: 8549 [2021-06-05 07:04:20,304 INFO L226 Difference]: Without dead ends: 8498 [2021-06-05 07:04:20,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 3222.2ms TimeCoverageRelationStatistics Valid=959, Invalid=5683, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 07:04:20,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8498 states. [2021-06-05 07:04:20,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8498 to 5868. [2021-06-05 07:04:20,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5868 states, 5867 states have (on average 2.3441281745355376) internal successors, (13753), 5867 states have internal predecessors, (13753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:20,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5868 states to 5868 states and 13753 transitions. [2021-06-05 07:04:20,388 INFO L78 Accepts]: Start accepts. Automaton has 5868 states and 13753 transitions. Word has length 37 [2021-06-05 07:04:20,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:20,388 INFO L482 AbstractCegarLoop]: Abstraction has 5868 states and 13753 transitions. [2021-06-05 07:04:20,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:20,388 INFO L276 IsEmpty]: Start isEmpty. Operand 5868 states and 13753 transitions. [2021-06-05 07:04:20,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:04:20,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:20,394 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:20,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1967,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:20,595 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:20,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:20,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1847263995, now seen corresponding path program 125 times [2021-06-05 07:04:20,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:20,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604918505] [2021-06-05 07:04:20,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:20,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:20,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604918505] [2021-06-05 07:04:20,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604918505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:20,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070043109] [2021-06-05 07:04:20,915 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:20,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:04:20,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:20,942 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 07:04:20,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:21,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070043109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:21,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:21,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 07:04:21,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785807629] [2021-06-05 07:04:21,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:04:21,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:21,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:04:21,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:04:21,689 INFO L87 Difference]: Start difference. First operand 5868 states and 13753 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:23,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:23,745 INFO L93 Difference]: Finished difference Result 6341 states and 14705 transitions. [2021-06-05 07:04:23,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 07:04:23,745 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:04:23,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:23,751 INFO L225 Difference]: With dead ends: 6341 [2021-06-05 07:04:23,751 INFO L226 Difference]: Without dead ends: 6287 [2021-06-05 07:04:23,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 2300.4ms TimeCoverageRelationStatistics Valid=431, Invalid=4971, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 07:04:23,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6287 states. [2021-06-05 07:04:23,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6287 to 6016. [2021-06-05 07:04:23,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6016 states, 6015 states have (on average 2.342975893599335) internal successors, (14093), 6015 states have internal predecessors, (14093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:23,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6016 states to 6016 states and 14093 transitions. [2021-06-05 07:04:23,819 INFO L78 Accepts]: Start accepts. Automaton has 6016 states and 14093 transitions. Word has length 37 [2021-06-05 07:04:23,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:23,820 INFO L482 AbstractCegarLoop]: Abstraction has 6016 states and 14093 transitions. [2021-06-05 07:04:23,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:23,820 INFO L276 IsEmpty]: Start isEmpty. Operand 6016 states and 14093 transitions. [2021-06-05 07:04:23,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:04:23,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:23,825 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:24,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1989 [2021-06-05 07:04:24,029 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:24,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:24,029 INFO L82 PathProgramCache]: Analyzing trace with hash -321497981, now seen corresponding path program 126 times [2021-06-05 07:04:24,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:24,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760502738] [2021-06-05 07:04:24,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:24,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:24,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760502738] [2021-06-05 07:04:24,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760502738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:24,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232565097] [2021-06-05 07:04:24,314 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:24,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:04:24,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:24,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:04:24,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:25,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232565097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:25,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:25,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 07:04:25,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182881989] [2021-06-05 07:04:25,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:04:25,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:25,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:04:25,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:04:25,046 INFO L87 Difference]: Start difference. First operand 6016 states and 14093 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:29,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:29,307 INFO L93 Difference]: Finished difference Result 6444 states and 14954 transitions. [2021-06-05 07:04:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 07:04:29,307 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:04:29,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:29,313 INFO L225 Difference]: With dead ends: 6444 [2021-06-05 07:04:29,313 INFO L226 Difference]: Without dead ends: 6408 [2021-06-05 07:04:29,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2669 ImplicationChecksByTransitivity, 4105.2ms TimeCoverageRelationStatistics Valid=738, Invalid=9564, Unknown=0, NotChecked=0, Total=10302 [2021-06-05 07:04:29,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6408 states. [2021-06-05 07:04:29,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6408 to 6108. [2021-06-05 07:04:29,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6108 states, 6107 states have (on average 2.3430489602095954) internal successors, (14309), 6107 states have internal predecessors, (14309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6108 states to 6108 states and 14309 transitions. [2021-06-05 07:04:29,384 INFO L78 Accepts]: Start accepts. Automaton has 6108 states and 14309 transitions. Word has length 37 [2021-06-05 07:04:29,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:29,384 INFO L482 AbstractCegarLoop]: Abstraction has 6108 states and 14309 transitions. [2021-06-05 07:04:29,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:29,384 INFO L276 IsEmpty]: Start isEmpty. Operand 6108 states and 14309 transitions. [2021-06-05 07:04:29,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:04:29,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:29,389 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:29,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2002 [2021-06-05 07:04:29,597 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:29,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:29,597 INFO L82 PathProgramCache]: Analyzing trace with hash 510926535, now seen corresponding path program 127 times [2021-06-05 07:04:29,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:29,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884375377] [2021-06-05 07:04:29,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:29,885 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:29,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:29,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884375377] [2021-06-05 07:04:29,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884375377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:29,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574287992] [2021-06-05 07:04:29,886 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:29,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:04:29,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:30,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574287992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:30,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:30,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 07:04:30,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396474257] [2021-06-05 07:04:30,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:04:30,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:30,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:04:30,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1242, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:04:30,578 INFO L87 Difference]: Start difference. First operand 6108 states and 14309 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:35,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:35,042 INFO L93 Difference]: Finished difference Result 6490 states and 15036 transitions. [2021-06-05 07:04:35,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 07:04:35,042 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:04:35,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:35,048 INFO L225 Difference]: With dead ends: 6490 [2021-06-05 07:04:35,048 INFO L226 Difference]: Without dead ends: 6421 [2021-06-05 07:04:35,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 4243.1ms TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 07:04:35,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2021-06-05 07:04:35,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 6086. [2021-06-05 07:04:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6086 states, 6085 states have (on average 2.341988496302383) internal successors, (14251), 6085 states have internal predecessors, (14251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:35,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6086 states to 6086 states and 14251 transitions. [2021-06-05 07:04:35,106 INFO L78 Accepts]: Start accepts. Automaton has 6086 states and 14251 transitions. Word has length 37 [2021-06-05 07:04:35,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:35,107 INFO L482 AbstractCegarLoop]: Abstraction has 6086 states and 14251 transitions. [2021-06-05 07:04:35,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:35,107 INFO L276 IsEmpty]: Start isEmpty. Operand 6086 states and 14251 transitions. [2021-06-05 07:04:35,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:04:35,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:35,112 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:35,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2021,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:35,312 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:35,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:35,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1467229701, now seen corresponding path program 128 times [2021-06-05 07:04:35,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:35,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655510202] [2021-06-05 07:04:35,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:35,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:35,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655510202] [2021-06-05 07:04:35,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655510202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:35,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382129589] [2021-06-05 07:04:35,596 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:35,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:35,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:35,625 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 07:04:35,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:36,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382129589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:36,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:36,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 07:04:36,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963560787] [2021-06-05 07:04:36,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:04:36,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:36,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:04:36,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:04:36,406 INFO L87 Difference]: Start difference. First operand 6086 states and 14251 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:39,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:39,512 INFO L93 Difference]: Finished difference Result 6707 states and 15582 transitions. [2021-06-05 07:04:39,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 07:04:39,512 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:04:39,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:39,518 INFO L225 Difference]: With dead ends: 6707 [2021-06-05 07:04:39,518 INFO L226 Difference]: Without dead ends: 6707 [2021-06-05 07:04:39,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2481 ImplicationChecksByTransitivity, 3027.0ms TimeCoverageRelationStatistics Valid=745, Invalid=7627, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 07:04:39,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6707 states. [2021-06-05 07:04:39,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6707 to 6194. [2021-06-05 07:04:39,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6194 states, 6193 states have (on average 2.3437752300984984) internal successors, (14515), 6193 states have internal predecessors, (14515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:39,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6194 states to 6194 states and 14515 transitions. [2021-06-05 07:04:39,580 INFO L78 Accepts]: Start accepts. Automaton has 6194 states and 14515 transitions. Word has length 37 [2021-06-05 07:04:39,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:39,580 INFO L482 AbstractCegarLoop]: Abstraction has 6194 states and 14515 transitions. [2021-06-05 07:04:39,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:39,580 INFO L276 IsEmpty]: Start isEmpty. Operand 6194 states and 14515 transitions. [2021-06-05 07:04:39,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:04:39,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:39,585 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:39,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2048 [2021-06-05 07:04:39,786 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:39,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:39,786 INFO L82 PathProgramCache]: Analyzing trace with hash -371186881, now seen corresponding path program 129 times [2021-06-05 07:04:39,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:39,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439211373] [2021-06-05 07:04:39,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:40,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:40,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439211373] [2021-06-05 07:04:40,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439211373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:40,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439140323] [2021-06-05 07:04:40,070 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:40,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:04:40,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:40,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 07:04:40,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:40,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439140323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:40,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:40,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 07:04:40,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119448022] [2021-06-05 07:04:40,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:04:40,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:40,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:04:40,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:04:40,711 INFO L87 Difference]: Start difference. First operand 6194 states and 14515 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:44,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:44,530 INFO L93 Difference]: Finished difference Result 6899 states and 15927 transitions. [2021-06-05 07:04:44,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 07:04:44,530 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:04:44,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:44,536 INFO L225 Difference]: With dead ends: 6899 [2021-06-05 07:04:44,536 INFO L226 Difference]: Without dead ends: 6848 [2021-06-05 07:04:44,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 3546.6ms TimeCoverageRelationStatistics Valid=676, Invalid=9626, Unknown=0, NotChecked=0, Total=10302 [2021-06-05 07:04:44,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6848 states. [2021-06-05 07:04:44,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6848 to 6222. [2021-06-05 07:04:44,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 6221 states have (on average 2.344639125542517) internal successors, (14586), 6221 states have internal predecessors, (14586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:44,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 14586 transitions. [2021-06-05 07:04:44,602 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 14586 transitions. Word has length 37 [2021-06-05 07:04:44,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:44,602 INFO L482 AbstractCegarLoop]: Abstraction has 6222 states and 14586 transitions. [2021-06-05 07:04:44,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:44,603 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 14586 transitions. [2021-06-05 07:04:44,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:04:44,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:44,607 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:44,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2070 [2021-06-05 07:04:44,808 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:44,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:44,808 INFO L82 PathProgramCache]: Analyzing trace with hash 461237635, now seen corresponding path program 130 times [2021-06-05 07:04:44,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:44,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091464212] [2021-06-05 07:04:44,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:45,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:45,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091464212] [2021-06-05 07:04:45,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091464212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:45,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530189091] [2021-06-05 07:04:45,072 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:45,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:45,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:45,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 07:04:45,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:45,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530189091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:45,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:45,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 07:04:45,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927366434] [2021-06-05 07:04:45,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:04:45,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:45,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:04:45,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1241, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:04:45,784 INFO L87 Difference]: Start difference. First operand 6222 states and 14586 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:51,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:51,238 INFO L93 Difference]: Finished difference Result 6675 states and 15477 transitions. [2021-06-05 07:04:51,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 07:04:51,238 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:04:51,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:51,244 INFO L225 Difference]: With dead ends: 6675 [2021-06-05 07:04:51,244 INFO L226 Difference]: Without dead ends: 6603 [2021-06-05 07:04:51,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4586 ImplicationChecksByTransitivity, 5144.2ms TimeCoverageRelationStatistics Valid=1103, Invalid=14397, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 07:04:51,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6603 states. [2021-06-05 07:04:51,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6603 to 6260. [2021-06-05 07:04:51,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6260 states, 6259 states have (on average 2.3447835117430897) internal successors, (14676), 6259 states have internal predecessors, (14676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:51,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6260 states to 6260 states and 14676 transitions. [2021-06-05 07:04:51,308 INFO L78 Accepts]: Start accepts. Automaton has 6260 states and 14676 transitions. Word has length 37 [2021-06-05 07:04:51,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:51,309 INFO L482 AbstractCegarLoop]: Abstraction has 6260 states and 14676 transitions. [2021-06-05 07:04:51,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:51,309 INFO L276 IsEmpty]: Start isEmpty. Operand 6260 states and 14676 transitions. [2021-06-05 07:04:51,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:04:51,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:51,314 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:51,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2096,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:51,514 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:51,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:51,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1488555781, now seen corresponding path program 131 times [2021-06-05 07:04:51,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:51,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328715707] [2021-06-05 07:04:51,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:51,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:51,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328715707] [2021-06-05 07:04:51,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328715707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:51,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712294421] [2021-06-05 07:04:51,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:51,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:04:51,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:51,828 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 07:04:51,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:52,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712294421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:52,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:52,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-06-05 07:04:52,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378254346] [2021-06-05 07:04:52,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 07:04:52,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:52,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 07:04:52,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:04:52,630 INFO L87 Difference]: Start difference. First operand 6260 states and 14676 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:54,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:54,954 INFO L93 Difference]: Finished difference Result 6797 states and 15791 transitions. [2021-06-05 07:04:54,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 07:04:54,955 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:04:54,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:54,960 INFO L225 Difference]: With dead ends: 6797 [2021-06-05 07:04:54,960 INFO L226 Difference]: Without dead ends: 6755 [2021-06-05 07:04:54,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 2491.9ms TimeCoverageRelationStatistics Valid=725, Invalid=6415, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 07:04:54,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6755 states. [2021-06-05 07:04:55,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6755 to 6340. [2021-06-05 07:04:55,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6340 states, 6339 states have (on average 2.3420097807225115) internal successors, (14846), 6339 states have internal predecessors, (14846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6340 states to 6340 states and 14846 transitions. [2021-06-05 07:04:55,025 INFO L78 Accepts]: Start accepts. Automaton has 6340 states and 14846 transitions. Word has length 37 [2021-06-05 07:04:55,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:55,025 INFO L482 AbstractCegarLoop]: Abstraction has 6340 states and 14846 transitions. [2021-06-05 07:04:55,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:55,025 INFO L276 IsEmpty]: Start isEmpty. Operand 6340 states and 14846 transitions. [2021-06-05 07:04:55,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:04:55,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:55,031 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:04:55,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2116 [2021-06-05 07:04:55,231 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:55,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:55,232 INFO L82 PathProgramCache]: Analyzing trace with hash -784873853, now seen corresponding path program 132 times [2021-06-05 07:04:55,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:55,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652171086] [2021-06-05 07:04:55,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:55,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:55,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652171086] [2021-06-05 07:04:55,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652171086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:55,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518293315] [2021-06-05 07:04:55,499 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:55,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:04:55,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:55,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 07:04:55,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:56,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518293315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:56,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:56,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 07:04:56,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826390384] [2021-06-05 07:04:56,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:04:56,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:56,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:04:56,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:04:56,170 INFO L87 Difference]: Start difference. First operand 6340 states and 14846 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:08,495 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2021-06-05 07:05:11,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:11,618 INFO L93 Difference]: Finished difference Result 8496 states and 19273 transitions. [2021-06-05 07:05:11,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2021-06-05 07:05:11,619 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:05:11,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:11,625 INFO L225 Difference]: With dead ends: 8496 [2021-06-05 07:05:11,626 INFO L226 Difference]: Without dead ends: 8484 [2021-06-05 07:05:11,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28541 ImplicationChecksByTransitivity, 14047.4ms TimeCoverageRelationStatistics Valid=5449, Invalid=67181, Unknown=0, NotChecked=0, Total=72630 [2021-06-05 07:05:11,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8484 states. [2021-06-05 07:05:11,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8484 to 6370. [2021-06-05 07:05:11,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6370 states, 6369 states have (on average 2.342282932956508) internal successors, (14918), 6369 states have internal predecessors, (14918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6370 states to 6370 states and 14918 transitions. [2021-06-05 07:05:11,718 INFO L78 Accepts]: Start accepts. Automaton has 6370 states and 14918 transitions. Word has length 37 [2021-06-05 07:05:11,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:11,718 INFO L482 AbstractCegarLoop]: Abstraction has 6370 states and 14918 transitions. [2021-06-05 07:05:11,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:11,718 INFO L276 IsEmpty]: Start isEmpty. Operand 6370 states and 14918 transitions. [2021-06-05 07:05:11,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:05:11,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:11,724 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:11,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2132,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:11,924 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:11,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:11,925 INFO L82 PathProgramCache]: Analyzing trace with hash -134804883, now seen corresponding path program 133 times [2021-06-05 07:05:11,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:11,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401661708] [2021-06-05 07:05:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:12,204 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:12,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:12,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401661708] [2021-06-05 07:05:12,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401661708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:12,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901268170] [2021-06-05 07:05:12,205 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:12,229 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 07:05:12,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:12,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901268170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:12,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:12,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-05 07:05:12,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012601044] [2021-06-05 07:05:12,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 07:05:12,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:12,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 07:05:12,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:05:12,978 INFO L87 Difference]: Start difference. First operand 6370 states and 14918 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:15,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:15,597 INFO L93 Difference]: Finished difference Result 6909 states and 15987 transitions. [2021-06-05 07:05:15,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 07:05:15,598 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:05:15,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:15,604 INFO L225 Difference]: With dead ends: 6909 [2021-06-05 07:05:15,604 INFO L226 Difference]: Without dead ends: 6891 [2021-06-05 07:05:15,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 2376.3ms TimeCoverageRelationStatistics Valid=553, Invalid=5299, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 07:05:15,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6891 states. [2021-06-05 07:05:15,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6891 to 6452. [2021-06-05 07:05:15,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6452 states, 6451 states have (on average 2.3432026042474035) internal successors, (15116), 6451 states have internal predecessors, (15116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6452 states to 6452 states and 15116 transitions. [2021-06-05 07:05:15,678 INFO L78 Accepts]: Start accepts. Automaton has 6452 states and 15116 transitions. Word has length 37 [2021-06-05 07:05:15,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:15,678 INFO L482 AbstractCegarLoop]: Abstraction has 6452 states and 15116 transitions. [2021-06-05 07:05:15,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:15,678 INFO L276 IsEmpty]: Start isEmpty. Operand 6452 states and 15116 transitions. [2021-06-05 07:05:15,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:05:15,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:15,685 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:15,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2167 [2021-06-05 07:05:15,901 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:15,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:15,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1908066299, now seen corresponding path program 134 times [2021-06-05 07:05:15,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:15,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769808722] [2021-06-05 07:05:15,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:16,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:16,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769808722] [2021-06-05 07:05:16,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769808722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:16,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085830359] [2021-06-05 07:05:16,193 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:16,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:05:16,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:16,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 07:05:16,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:16,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085830359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:16,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:16,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-06-05 07:05:16,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203289161] [2021-06-05 07:05:16,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 07:05:16,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:16,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 07:05:16,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:05:16,893 INFO L87 Difference]: Start difference. First operand 6452 states and 15116 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:21,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:21,016 INFO L93 Difference]: Finished difference Result 8689 states and 20145 transitions. [2021-06-05 07:05:21,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 07:05:21,017 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:05:21,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:21,024 INFO L225 Difference]: With dead ends: 8689 [2021-06-05 07:05:21,024 INFO L226 Difference]: Without dead ends: 8655 [2021-06-05 07:05:21,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3911 ImplicationChecksByTransitivity, 3868.4ms TimeCoverageRelationStatistics Valid=1429, Invalid=10781, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 07:05:21,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8655 states. [2021-06-05 07:05:21,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8655 to 6530. [2021-06-05 07:05:21,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6530 states, 6529 states have (on average 2.342165722162659) internal successors, (15292), 6529 states have internal predecessors, (15292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:21,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6530 states to 6530 states and 15292 transitions. [2021-06-05 07:05:21,103 INFO L78 Accepts]: Start accepts. Automaton has 6530 states and 15292 transitions. Word has length 37 [2021-06-05 07:05:21,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:21,103 INFO L482 AbstractCegarLoop]: Abstraction has 6530 states and 15292 transitions. [2021-06-05 07:05:21,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:21,103 INFO L276 IsEmpty]: Start isEmpty. Operand 6530 states and 15292 transitions. [2021-06-05 07:05:21,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:05:21,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:21,109 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:21,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2185,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:21,310 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:21,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:21,310 INFO L82 PathProgramCache]: Analyzing trace with hash -605365953, now seen corresponding path program 135 times [2021-06-05 07:05:21,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:21,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354456309] [2021-06-05 07:05:21,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:21,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:21,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354456309] [2021-06-05 07:05:21,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354456309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:21,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916290829] [2021-06-05 07:05:21,596 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:21,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:05:21,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:21,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 07:05:21,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:22,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916290829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:22,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:22,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-06-05 07:05:22,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114770921] [2021-06-05 07:05:22,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:05:22,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:22,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:05:22,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:05:22,027 INFO L87 Difference]: Start difference. First operand 6530 states and 15292 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:26,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:26,197 INFO L93 Difference]: Finished difference Result 8866 states and 20480 transitions. [2021-06-05 07:05:26,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 07:05:26,197 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:05:26,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:26,206 INFO L225 Difference]: With dead ends: 8866 [2021-06-05 07:05:26,206 INFO L226 Difference]: Without dead ends: 8800 [2021-06-05 07:05:26,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3379 ImplicationChecksByTransitivity, 3452.3ms TimeCoverageRelationStatistics Valid=1022, Invalid=10534, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 07:05:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8800 states. [2021-06-05 07:05:26,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8800 to 6612. [2021-06-05 07:05:26,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6612 states, 6611 states have (on average 2.341249432763576) internal successors, (15478), 6611 states have internal predecessors, (15478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:26,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6612 states to 6612 states and 15478 transitions. [2021-06-05 07:05:26,292 INFO L78 Accepts]: Start accepts. Automaton has 6612 states and 15478 transitions. Word has length 37 [2021-06-05 07:05:26,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:26,292 INFO L482 AbstractCegarLoop]: Abstraction has 6612 states and 15478 transitions. [2021-06-05 07:05:26,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:26,292 INFO L276 IsEmpty]: Start isEmpty. Operand 6612 states and 15478 transitions. [2021-06-05 07:05:26,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:05:26,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:26,299 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:26,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2209 [2021-06-05 07:05:26,513 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:26,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:26,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1064850861, now seen corresponding path program 136 times [2021-06-05 07:05:26,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:26,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852515975] [2021-06-05 07:05:26,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:26,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:26,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852515975] [2021-06-05 07:05:26,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852515975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:26,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397627316] [2021-06-05 07:05:26,841 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:26,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:05:26,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:26,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 07:05:26,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:05:27,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397627316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:27,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:27,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-06-05 07:05:27,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88844041] [2021-06-05 07:05:27,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:05:27,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:27,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:05:27,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:05:27,253 INFO L87 Difference]: Start difference. First operand 6612 states and 15478 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:32,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:32,181 INFO L93 Difference]: Finished difference Result 10348 states and 23647 transitions. [2021-06-05 07:05:32,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 07:05:32,181 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:05:32,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:32,192 INFO L225 Difference]: With dead ends: 10348 [2021-06-05 07:05:32,192 INFO L226 Difference]: Without dead ends: 10305 [2021-06-05 07:05:32,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4756 ImplicationChecksByTransitivity, 4158.6ms TimeCoverageRelationStatistics Valid=1422, Invalid=13830, Unknown=0, NotChecked=0, Total=15252 [2021-06-05 07:05:32,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10305 states. [2021-06-05 07:05:32,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10305 to 6781. [2021-06-05 07:05:32,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6781 states, 6780 states have (on average 2.344395280235988) internal successors, (15895), 6780 states have internal predecessors, (15895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:32,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6781 states to 6781 states and 15895 transitions. [2021-06-05 07:05:32,288 INFO L78 Accepts]: Start accepts. Automaton has 6781 states and 15895 transitions. Word has length 37 [2021-06-05 07:05:32,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:32,288 INFO L482 AbstractCegarLoop]: Abstraction has 6781 states and 15895 transitions. [2021-06-05 07:05:32,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:32,289 INFO L276 IsEmpty]: Start isEmpty. Operand 6781 states and 15895 transitions. [2021-06-05 07:05:32,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:05:32,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:32,294 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:32,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2218,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:32,495 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:32,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:32,495 INFO L82 PathProgramCache]: Analyzing trace with hash 535237559, now seen corresponding path program 137 times [2021-06-05 07:05:32,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:32,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948349867] [2021-06-05 07:05:32,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:32,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:32,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948349867] [2021-06-05 07:05:32,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948349867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:32,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975947617] [2021-06-05 07:05:32,750 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:32,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:05:32,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:32,777 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 07:05:32,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:33,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975947617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:33,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:33,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2021-06-05 07:05:33,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909622470] [2021-06-05 07:05:33,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 07:05:33,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:33,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 07:05:33,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:05:33,459 INFO L87 Difference]: Start difference. First operand 6781 states and 15895 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:35,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:35,828 INFO L93 Difference]: Finished difference Result 7588 states and 17601 transitions. [2021-06-05 07:05:35,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 07:05:35,828 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:05:35,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:35,835 INFO L225 Difference]: With dead ends: 7588 [2021-06-05 07:05:35,836 INFO L226 Difference]: Without dead ends: 7588 [2021-06-05 07:05:35,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2433 ImplicationChecksByTransitivity, 2301.1ms TimeCoverageRelationStatistics Valid=839, Invalid=7171, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 07:05:35,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7588 states. [2021-06-05 07:05:35,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7588 to 6907. [2021-06-05 07:05:35,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6907 states, 6906 states have (on average 2.347958297132928) internal successors, (16215), 6906 states have internal predecessors, (16215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:35,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6907 states to 6907 states and 16215 transitions. [2021-06-05 07:05:35,914 INFO L78 Accepts]: Start accepts. Automaton has 6907 states and 16215 transitions. Word has length 37 [2021-06-05 07:05:35,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:35,915 INFO L482 AbstractCegarLoop]: Abstraction has 6907 states and 16215 transitions. [2021-06-05 07:05:35,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:35,915 INFO L276 IsEmpty]: Start isEmpty. Operand 6907 states and 16215 transitions. [2021-06-05 07:05:35,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:05:35,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:35,922 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:36,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2228 [2021-06-05 07:05:36,122 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:36,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:36,122 INFO L82 PathProgramCache]: Analyzing trace with hash 596039863, now seen corresponding path program 138 times [2021-06-05 07:05:36,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:36,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593934107] [2021-06-05 07:05:36,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:36,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:36,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593934107] [2021-06-05 07:05:36,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593934107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:36,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387639457] [2021-06-05 07:05:36,385 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:36,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:05:36,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:36,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 07:05:36,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:37,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387639457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:37,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:37,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-06-05 07:05:37,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843217061] [2021-06-05 07:05:37,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 07:05:37,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:37,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 07:05:37,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:05:37,045 INFO L87 Difference]: Start difference. First operand 6907 states and 16215 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:42,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:42,019 INFO L93 Difference]: Finished difference Result 9465 states and 21940 transitions. [2021-06-05 07:05:42,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 07:05:42,020 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:05:42,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:42,028 INFO L225 Difference]: With dead ends: 9465 [2021-06-05 07:05:42,028 INFO L226 Difference]: Without dead ends: 9404 [2021-06-05 07:05:42,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4905 ImplicationChecksByTransitivity, 4600.2ms TimeCoverageRelationStatistics Valid=1741, Invalid=13021, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 07:05:42,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9404 states. [2021-06-05 07:05:42,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9404 to 7012. [2021-06-05 07:05:42,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7012 states, 7011 states have (on average 2.3451718727713593) internal successors, (16442), 7011 states have internal predecessors, (16442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:42,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7012 states to 7012 states and 16442 transitions. [2021-06-05 07:05:42,116 INFO L78 Accepts]: Start accepts. Automaton has 7012 states and 16442 transitions. Word has length 37 [2021-06-05 07:05:42,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:42,116 INFO L482 AbstractCegarLoop]: Abstraction has 7012 states and 16442 transitions. [2021-06-05 07:05:42,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:42,116 INFO L276 IsEmpty]: Start isEmpty. Operand 7012 states and 16442 transitions. [2021-06-05 07:05:42,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:05:42,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:42,123 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:42,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2247 [2021-06-05 07:05:42,324 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:42,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:42,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1294610557, now seen corresponding path program 139 times [2021-06-05 07:05:42,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:42,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061267271] [2021-06-05 07:05:42,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:42,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:42,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061267271] [2021-06-05 07:05:42,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061267271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:42,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659910630] [2021-06-05 07:05:42,588 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:42,652 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 07:05:42,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:43,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659910630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:43,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:43,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 07:05:43,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526217100] [2021-06-05 07:05:43,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 07:05:43,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:43,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 07:05:43,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:05:43,319 INFO L87 Difference]: Start difference. First operand 7012 states and 16442 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:47,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:47,704 INFO L93 Difference]: Finished difference Result 12834 states and 29277 transitions. [2021-06-05 07:05:47,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 07:05:47,704 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:05:47,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:47,716 INFO L225 Difference]: With dead ends: 12834 [2021-06-05 07:05:47,717 INFO L226 Difference]: Without dead ends: 12677 [2021-06-05 07:05:47,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6069 ImplicationChecksByTransitivity, 4128.8ms TimeCoverageRelationStatistics Valid=2193, Invalid=14319, Unknown=0, NotChecked=0, Total=16512 [2021-06-05 07:05:47,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12677 states. [2021-06-05 07:05:47,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12677 to 7393. [2021-06-05 07:05:47,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7393 states, 7392 states have (on average 2.354707792207792) internal successors, (17406), 7392 states have internal predecessors, (17406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:47,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7393 states to 7393 states and 17406 transitions. [2021-06-05 07:05:47,822 INFO L78 Accepts]: Start accepts. Automaton has 7393 states and 17406 transitions. Word has length 37 [2021-06-05 07:05:47,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:47,822 INFO L482 AbstractCegarLoop]: Abstraction has 7393 states and 17406 transitions. [2021-06-05 07:05:47,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:47,823 INFO L276 IsEmpty]: Start isEmpty. Operand 7393 states and 17406 transitions. [2021-06-05 07:05:47,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:05:47,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:47,829 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:48,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2268 [2021-06-05 07:05:48,029 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:48,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:48,030 INFO L82 PathProgramCache]: Analyzing trace with hash 889571579, now seen corresponding path program 140 times [2021-06-05 07:05:48,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:48,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087887718] [2021-06-05 07:05:48,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:48,305 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:05:48,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:48,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087887718] [2021-06-05 07:05:48,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087887718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:48,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280019546] [2021-06-05 07:05:48,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:48,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:05:48,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:48,330 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 07:05:48,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:49,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280019546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:49,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:49,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-06-05 07:05:49,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473395252] [2021-06-05 07:05:49,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 07:05:49,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:49,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 07:05:49,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 07:05:49,095 INFO L87 Difference]: Start difference. First operand 7393 states and 17406 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:52,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:52,686 INFO L93 Difference]: Finished difference Result 10016 states and 23322 transitions. [2021-06-05 07:05:52,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 07:05:52,687 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:05:52,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:52,697 INFO L225 Difference]: With dead ends: 10016 [2021-06-05 07:05:52,697 INFO L226 Difference]: Without dead ends: 9961 [2021-06-05 07:05:52,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 3615.7ms TimeCoverageRelationStatistics Valid=960, Invalid=7050, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 07:05:52,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-06-05 07:05:52,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 7444. [2021-06-05 07:05:52,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7444 states, 7443 states have (on average 2.3526803708182187) internal successors, (17511), 7443 states have internal predecessors, (17511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:52,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7444 states to 7444 states and 17511 transitions. [2021-06-05 07:05:52,787 INFO L78 Accepts]: Start accepts. Automaton has 7444 states and 17511 transitions. Word has length 37 [2021-06-05 07:05:52,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:52,787 INFO L482 AbstractCegarLoop]: Abstraction has 7444 states and 17511 transitions. [2021-06-05 07:05:52,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:52,787 INFO L276 IsEmpty]: Start isEmpty. Operand 7444 states and 17511 transitions. [2021-06-05 07:05:52,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:05:52,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:52,794 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:52,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2285,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:52,994 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:52,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:52,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1449579259, now seen corresponding path program 141 times [2021-06-05 07:05:52,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:52,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78571138] [2021-06-05 07:05:52,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:53,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:53,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78571138] [2021-06-05 07:05:53,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78571138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:53,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103360146] [2021-06-05 07:05:53,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:53,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 07:05:53,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:53,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 07:05:53,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:53,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103360146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:53,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:53,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2021-06-05 07:05:53,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884992933] [2021-06-05 07:05:53,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 07:05:53,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:53,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 07:05:53,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:05:53,651 INFO L87 Difference]: Start difference. First operand 7444 states and 17511 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:56,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:56,557 INFO L93 Difference]: Finished difference Result 10247 states and 23785 transitions. [2021-06-05 07:05:56,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 07:05:56,557 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:05:56,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:56,567 INFO L225 Difference]: With dead ends: 10247 [2021-06-05 07:05:56,567 INFO L226 Difference]: Without dead ends: 10170 [2021-06-05 07:05:56,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 2594.3ms TimeCoverageRelationStatistics Valid=893, Invalid=6589, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 07:05:56,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10170 states. [2021-06-05 07:05:56,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10170 to 7464. [2021-06-05 07:05:56,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7464 states, 7463 states have (on average 2.352405198981643) internal successors, (17556), 7463 states have internal predecessors, (17556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:56,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7464 states to 7464 states and 17556 transitions. [2021-06-05 07:05:56,671 INFO L78 Accepts]: Start accepts. Automaton has 7464 states and 17556 transitions. Word has length 37 [2021-06-05 07:05:56,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:56,671 INFO L482 AbstractCegarLoop]: Abstraction has 7464 states and 17556 transitions. [2021-06-05 07:05:56,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:56,671 INFO L276 IsEmpty]: Start isEmpty. Operand 7464 states and 17556 transitions. [2021-06-05 07:05:56,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:05:56,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:56,700 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:05:56,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2307 [2021-06-05 07:05:56,900 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:56,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:56,901 INFO L82 PathProgramCache]: Analyzing trace with hash 380397771, now seen corresponding path program 142 times [2021-06-05 07:05:56,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:56,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873161942] [2021-06-05 07:05:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:57,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:57,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873161942] [2021-06-05 07:05:57,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873161942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:57,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132969500] [2021-06-05 07:05:57,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:57,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:05:57,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:57,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 07:05:57,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:57,750 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:57,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132969500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:57,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:57,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-06-05 07:05:57,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74447014] [2021-06-05 07:05:57,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 07:05:57,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:57,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 07:05:57,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:05:57,751 INFO L87 Difference]: Start difference. First operand 7464 states and 17556 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:00,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:00,550 INFO L93 Difference]: Finished difference Result 11331 states and 26458 transitions. [2021-06-05 07:06:00,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 07:06:00,550 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:06:00,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:00,562 INFO L225 Difference]: With dead ends: 11331 [2021-06-05 07:06:00,562 INFO L226 Difference]: Without dead ends: 11256 [2021-06-05 07:06:00,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2151 ImplicationChecksByTransitivity, 2743.9ms TimeCoverageRelationStatistics Valid=1062, Invalid=6078, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 07:06:00,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11256 states. [2021-06-05 07:06:00,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11256 to 8172. [2021-06-05 07:06:00,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8172 states, 8171 states have (on average 2.3583404724023986) internal successors, (19270), 8171 states have internal predecessors, (19270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8172 states to 8172 states and 19270 transitions. [2021-06-05 07:06:00,693 INFO L78 Accepts]: Start accepts. Automaton has 8172 states and 19270 transitions. Word has length 37 [2021-06-05 07:06:00,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:00,693 INFO L482 AbstractCegarLoop]: Abstraction has 8172 states and 19270 transitions. [2021-06-05 07:06:00,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:00,693 INFO L276 IsEmpty]: Start isEmpty. Operand 8172 states and 19270 transitions. [2021-06-05 07:06:00,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:06:00,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:00,700 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:00,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2316 [2021-06-05 07:06:00,901 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:00,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:00,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1713251961, now seen corresponding path program 143 times [2021-06-05 07:06:00,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:00,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077839231] [2021-06-05 07:06:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:01,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:01,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077839231] [2021-06-05 07:06:01,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077839231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:01,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582121627] [2021-06-05 07:06:01,156 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:01,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 07:06:01,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:01,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 07:06:01,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:06:01,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582121627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:01,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:01,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2021-06-05 07:06:01,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328774346] [2021-06-05 07:06:01,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 07:06:01,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:01,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 07:06:01,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:06:01,728 INFO L87 Difference]: Start difference. First operand 8172 states and 19270 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:06,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:06,316 INFO L93 Difference]: Finished difference Result 11271 states and 26216 transitions. [2021-06-05 07:06:06,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 07:06:06,317 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:06:06,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:06,328 INFO L225 Difference]: With dead ends: 11271 [2021-06-05 07:06:06,328 INFO L226 Difference]: Without dead ends: 11205 [2021-06-05 07:06:06,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 4314.5ms TimeCoverageRelationStatistics Valid=1180, Invalid=8326, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 07:06:06,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11205 states. [2021-06-05 07:06:06,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11205 to 8408. [2021-06-05 07:06:06,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8408 states, 8407 states have (on average 2.3495896276912096) internal successors, (19753), 8407 states have internal predecessors, (19753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:06,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8408 states to 8408 states and 19753 transitions. [2021-06-05 07:06:06,437 INFO L78 Accepts]: Start accepts. Automaton has 8408 states and 19753 transitions. Word has length 37 [2021-06-05 07:06:06,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:06,437 INFO L482 AbstractCegarLoop]: Abstraction has 8408 states and 19753 transitions. [2021-06-05 07:06:06,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:06,437 INFO L276 IsEmpty]: Start isEmpty. Operand 8408 states and 19753 transitions. [2021-06-05 07:06:06,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:06:06,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:06,445 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:06,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2336,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:06,661 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:06,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:06,662 INFO L82 PathProgramCache]: Analyzing trace with hash -787483265, now seen corresponding path program 144 times [2021-06-05 07:06:06,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:06,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820870803] [2021-06-05 07:06:06,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:07,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:07,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820870803] [2021-06-05 07:06:07,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820870803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:07,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589139896] [2021-06-05 07:06:07,079 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:07,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 07:06:07,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:07,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 07:06:07,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:07,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589139896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:07,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:07,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 07:06:07,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001291887] [2021-06-05 07:06:07,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:06:07,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:07,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:06:07,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:06:07,882 INFO L87 Difference]: Start difference. First operand 8408 states and 19753 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:10,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:10,632 INFO L93 Difference]: Finished difference Result 9319 states and 21711 transitions. [2021-06-05 07:06:10,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 07:06:10,632 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:06:10,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:10,641 INFO L225 Difference]: With dead ends: 9319 [2021-06-05 07:06:10,641 INFO L226 Difference]: Without dead ends: 9265 [2021-06-05 07:06:10,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1958 ImplicationChecksByTransitivity, 2665.6ms TimeCoverageRelationStatistics Valid=595, Invalid=6211, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 07:06:10,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9265 states. [2021-06-05 07:06:10,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9265 to 8562. [2021-06-05 07:06:10,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8562 states, 8561 states have (on average 2.3510103959817776) internal successors, (20127), 8561 states have internal predecessors, (20127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:10,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8562 states to 8562 states and 20127 transitions. [2021-06-05 07:06:10,733 INFO L78 Accepts]: Start accepts. Automaton has 8562 states and 20127 transitions. Word has length 37 [2021-06-05 07:06:10,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:10,733 INFO L482 AbstractCegarLoop]: Abstraction has 8562 states and 20127 transitions. [2021-06-05 07:06:10,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:10,733 INFO L276 IsEmpty]: Start isEmpty. Operand 8562 states and 20127 transitions. [2021-06-05 07:06:10,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:06:10,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:10,740 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:10,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2356 [2021-06-05 07:06:10,941 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:10,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:10,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1338722055, now seen corresponding path program 145 times [2021-06-05 07:06:10,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:10,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903005022] [2021-06-05 07:06:10,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:11,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:11,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903005022] [2021-06-05 07:06:11,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903005022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:11,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226443825] [2021-06-05 07:06:11,270 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:11,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 07:06:11,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:12,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226443825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:12,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:12,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 07:06:12,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489327955] [2021-06-05 07:06:12,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:06:12,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:12,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:06:12,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:06:12,044 INFO L87 Difference]: Start difference. First operand 8562 states and 20127 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:18,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:18,273 INFO L93 Difference]: Finished difference Result 9415 states and 21837 transitions. [2021-06-05 07:06:18,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-05 07:06:18,273 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:06:18,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:18,282 INFO L225 Difference]: With dead ends: 9415 [2021-06-05 07:06:18,282 INFO L226 Difference]: Without dead ends: 9370 [2021-06-05 07:06:18,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5155 ImplicationChecksByTransitivity, 5537.3ms TimeCoverageRelationStatistics Valid=927, Invalid=15329, Unknown=0, NotChecked=0, Total=16256 [2021-06-05 07:06:18,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9370 states. [2021-06-05 07:06:18,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9370 to 8678. [2021-06-05 07:06:18,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8678 states, 8677 states have (on average 2.355076639391495) internal successors, (20435), 8677 states have internal predecessors, (20435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:18,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8678 states to 8678 states and 20435 transitions. [2021-06-05 07:06:18,381 INFO L78 Accepts]: Start accepts. Automaton has 8678 states and 20435 transitions. Word has length 37 [2021-06-05 07:06:18,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:18,381 INFO L482 AbstractCegarLoop]: Abstraction has 8678 states and 20435 transitions. [2021-06-05 07:06:18,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:18,381 INFO L276 IsEmpty]: Start isEmpty. Operand 8678 states and 20435 transitions. [2021-06-05 07:06:18,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:06:18,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:18,389 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:18,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2374,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:18,590 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:18,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:18,590 INFO L82 PathProgramCache]: Analyzing trace with hash -2123820725, now seen corresponding path program 146 times [2021-06-05 07:06:18,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:18,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140161019] [2021-06-05 07:06:18,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:18,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:18,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140161019] [2021-06-05 07:06:18,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140161019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:18,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873370183] [2021-06-05 07:06:18,889 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:18,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:06:18,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:18,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 07:06:18,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:19,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873370183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:19,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:19,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-06-05 07:06:19,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355147056] [2021-06-05 07:06:19,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 07:06:19,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:19,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 07:06:19,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:06:19,573 INFO L87 Difference]: Start difference. First operand 8678 states and 20435 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:25,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:25,940 INFO L93 Difference]: Finished difference Result 9447 states and 21893 transitions. [2021-06-05 07:06:25,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 07:06:25,941 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:06:25,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:25,949 INFO L225 Difference]: With dead ends: 9447 [2021-06-05 07:06:25,949 INFO L226 Difference]: Without dead ends: 9429 [2021-06-05 07:06:25,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5448.6ms TimeCoverageRelationStatistics Valid=962, Invalid=14290, Unknown=0, NotChecked=0, Total=15252 [2021-06-05 07:06:25,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9429 states. [2021-06-05 07:06:26,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9429 to 8687. [2021-06-05 07:06:26,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8687 states, 8686 states have (on average 2.354823854478471) internal successors, (20454), 8686 states have internal predecessors, (20454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:26,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8687 states to 8687 states and 20454 transitions. [2021-06-05 07:06:26,044 INFO L78 Accepts]: Start accepts. Automaton has 8687 states and 20454 transitions. Word has length 37 [2021-06-05 07:06:26,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:26,044 INFO L482 AbstractCegarLoop]: Abstraction has 8687 states and 20454 transitions. [2021-06-05 07:06:26,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:26,044 INFO L276 IsEmpty]: Start isEmpty. Operand 8687 states and 20454 transitions. [2021-06-05 07:06:26,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:06:26,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:26,051 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:26,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2406 [2021-06-05 07:06:26,252 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:26,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:26,252 INFO L82 PathProgramCache]: Analyzing trace with hash 2042403983, now seen corresponding path program 147 times [2021-06-05 07:06:26,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:26,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403410269] [2021-06-05 07:06:26,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:26,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:26,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403410269] [2021-06-05 07:06:26,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403410269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:26,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534744258] [2021-06-05 07:06:26,570 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:26,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 07:06:26,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:26,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 07:06:26,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:26,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534744258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:26,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:26,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2021-06-05 07:06:26,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434760694] [2021-06-05 07:06:26,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 07:06:26,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:26,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 07:06:26,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:06:26,995 INFO L87 Difference]: Start difference. First operand 8687 states and 20454 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:32,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:32,018 INFO L93 Difference]: Finished difference Result 10286 states and 23827 transitions. [2021-06-05 07:06:32,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 07:06:32,018 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:06:32,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:32,028 INFO L225 Difference]: With dead ends: 10286 [2021-06-05 07:06:32,028 INFO L226 Difference]: Without dead ends: 10163 [2021-06-05 07:06:32,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4593 ImplicationChecksByTransitivity, 4214.3ms TimeCoverageRelationStatistics Valid=1527, Invalid=14223, Unknown=0, NotChecked=0, Total=15750 [2021-06-05 07:06:32,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10163 states. [2021-06-05 07:06:32,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10163 to 8213. [2021-06-05 07:06:32,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8213 states, 8212 states have (on average 2.32501217730151) internal successors, (19093), 8212 states have internal predecessors, (19093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:32,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8213 states to 8213 states and 19093 transitions. [2021-06-05 07:06:32,134 INFO L78 Accepts]: Start accepts. Automaton has 8213 states and 19093 transitions. Word has length 37 [2021-06-05 07:06:32,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:32,134 INFO L482 AbstractCegarLoop]: Abstraction has 8213 states and 19093 transitions. [2021-06-05 07:06:32,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:32,135 INFO L276 IsEmpty]: Start isEmpty. Operand 8213 states and 19093 transitions. [2021-06-05 07:06:32,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:06:32,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:32,141 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:32,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2437,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:32,342 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:32,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:32,342 INFO L82 PathProgramCache]: Analyzing trace with hash -726680961, now seen corresponding path program 148 times [2021-06-05 07:06:32,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:32,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130051710] [2021-06-05 07:06:32,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:32,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:32,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130051710] [2021-06-05 07:06:32,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130051710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:32,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325103982] [2021-06-05 07:06:32,609 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:32,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:06:32,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:32,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 07:06:32,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:33,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325103982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:33,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:33,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-06-05 07:06:33,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144726409] [2021-06-05 07:06:33,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 07:06:33,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:33,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 07:06:33,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:06:33,236 INFO L87 Difference]: Start difference. First operand 8213 states and 19093 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:36,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:36,072 INFO L93 Difference]: Finished difference Result 10792 states and 24889 transitions. [2021-06-05 07:06:36,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 07:06:36,072 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:06:36,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:36,083 INFO L225 Difference]: With dead ends: 10792 [2021-06-05 07:06:36,083 INFO L226 Difference]: Without dead ends: 10724 [2021-06-05 07:06:36,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 2678.2ms TimeCoverageRelationStatistics Valid=745, Invalid=7087, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 07:06:36,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10724 states. [2021-06-05 07:06:36,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10724 to 8396. [2021-06-05 07:06:36,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8396 states, 8395 states have (on average 2.321262656343061) internal successors, (19487), 8395 states have internal predecessors, (19487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:36,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8396 states to 8396 states and 19487 transitions. [2021-06-05 07:06:36,187 INFO L78 Accepts]: Start accepts. Automaton has 8396 states and 19487 transitions. Word has length 37 [2021-06-05 07:06:36,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:36,187 INFO L482 AbstractCegarLoop]: Abstraction has 8396 states and 19487 transitions. [2021-06-05 07:06:36,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:36,187 INFO L276 IsEmpty]: Start isEmpty. Operand 8396 states and 19487 transitions. [2021-06-05 07:06:36,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:06:36,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:36,195 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:36,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2454 [2021-06-05 07:06:36,395 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:36,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:36,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1054854083, now seen corresponding path program 149 times [2021-06-05 07:06:36,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:36,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352592328] [2021-06-05 07:06:36,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:36,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:36,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352592328] [2021-06-05 07:06:36,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352592328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:36,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788781294] [2021-06-05 07:06:36,699 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:36,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 07:06:36,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:36,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 07:06:36,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:37,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788781294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:37,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:37,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-06-05 07:06:37,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359635914] [2021-06-05 07:06:37,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 07:06:37,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:37,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 07:06:37,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:06:37,410 INFO L87 Difference]: Start difference. First operand 8396 states and 19487 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:41,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:41,192 INFO L93 Difference]: Finished difference Result 11349 states and 26070 transitions. [2021-06-05 07:06:41,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 07:06:41,193 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:06:41,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:41,203 INFO L225 Difference]: With dead ends: 11349 [2021-06-05 07:06:41,203 INFO L226 Difference]: Without dead ends: 11303 [2021-06-05 07:06:41,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2793 ImplicationChecksByTransitivity, 3430.8ms TimeCoverageRelationStatistics Valid=959, Invalid=8547, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 07:06:41,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11303 states. [2021-06-05 07:06:41,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11303 to 8676. [2021-06-05 07:06:41,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8676 states, 8675 states have (on average 2.31700288184438) internal successors, (20100), 8675 states have internal predecessors, (20100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:41,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8676 states to 8676 states and 20100 transitions. [2021-06-05 07:06:41,308 INFO L78 Accepts]: Start accepts. Automaton has 8676 states and 20100 transitions. Word has length 37 [2021-06-05 07:06:41,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:41,308 INFO L482 AbstractCegarLoop]: Abstraction has 8676 states and 20100 transitions. [2021-06-05 07:06:41,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:41,308 INFO L276 IsEmpty]: Start isEmpty. Operand 8676 states and 20100 transitions. [2021-06-05 07:06:41,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:06:41,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:41,316 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:41,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2477 [2021-06-05 07:06:41,525 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:41,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:41,525 INFO L82 PathProgramCache]: Analyzing trace with hash 766205447, now seen corresponding path program 150 times [2021-06-05 07:06:41,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:41,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455825966] [2021-06-05 07:06:41,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:41,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:41,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455825966] [2021-06-05 07:06:41,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455825966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:41,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512524301] [2021-06-05 07:06:41,795 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:41,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 07:06:41,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:41,820 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-05 07:06:41,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:42,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512524301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:42,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:42,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 07:06:42,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546378175] [2021-06-05 07:06:42,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 07:06:42,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:42,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 07:06:42,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:06:42,664 INFO L87 Difference]: Start difference. First operand 8676 states and 20100 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:47,739 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-06-05 07:06:48,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:48,202 INFO L93 Difference]: Finished difference Result 12806 states and 29266 transitions. [2021-06-05 07:06:48,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 07:06:48,202 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:06:48,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:48,215 INFO L225 Difference]: With dead ends: 12806 [2021-06-05 07:06:48,215 INFO L226 Difference]: Without dead ends: 12763 [2021-06-05 07:06:48,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5274 ImplicationChecksByTransitivity, 5295.6ms TimeCoverageRelationStatistics Valid=1929, Invalid=13323, Unknown=0, NotChecked=0, Total=15252 [2021-06-05 07:06:48,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-06-05 07:06:48,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 8944. [2021-06-05 07:06:48,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8944 states, 8943 states have (on average 2.3187968243318795) internal successors, (20737), 8943 states have internal predecessors, (20737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:48,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8944 states to 8944 states and 20737 transitions. [2021-06-05 07:06:48,335 INFO L78 Accepts]: Start accepts. Automaton has 8944 states and 20737 transitions. Word has length 37 [2021-06-05 07:06:48,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:48,336 INFO L482 AbstractCegarLoop]: Abstraction has 8944 states and 20737 transitions. [2021-06-05 07:06:48,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:48,336 INFO L276 IsEmpty]: Start isEmpty. Operand 8944 states and 20737 transitions. [2021-06-05 07:06:48,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:06:48,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:48,344 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:48,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2499 [2021-06-05 07:06:48,544 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:48,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:48,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1506799643, now seen corresponding path program 151 times [2021-06-05 07:06:48,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:48,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740817808] [2021-06-05 07:06:48,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:48,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:48,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740817808] [2021-06-05 07:06:48,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740817808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:48,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498678168] [2021-06-05 07:06:48,828 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 [2021-06-05 07:06:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:48,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 07:06:48,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:49,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498678168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:49,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:49,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-06-05 07:06:49,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627085543] [2021-06-05 07:06:49,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 07:06:49,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:49,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 07:06:49,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:06:49,517 INFO L87 Difference]: Start difference. First operand 8944 states and 20737 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:54,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:54,686 INFO L93 Difference]: Finished difference Result 13828 states and 31463 transitions. [2021-06-05 07:06:54,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 07:06:54,686 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:06:54,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:54,702 INFO L225 Difference]: With dead ends: 13828 [2021-06-05 07:06:54,702 INFO L226 Difference]: Without dead ends: 13763 [2021-06-05 07:06:54,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5053 ImplicationChecksByTransitivity, 4525.6ms TimeCoverageRelationStatistics Valid=1672, Invalid=13828, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 07:06:54,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13763 states. [2021-06-05 07:06:54,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13763 to 9228. [2021-06-05 07:06:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9228 states, 9227 states have (on average 2.318630107293812) internal successors, (21394), 9227 states have internal predecessors, (21394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:54,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9228 states to 9228 states and 21394 transitions. [2021-06-05 07:06:54,858 INFO L78 Accepts]: Start accepts. Automaton has 9228 states and 21394 transitions. Word has length 37 [2021-06-05 07:06:54,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:54,858 INFO L482 AbstractCegarLoop]: Abstraction has 9228 states and 21394 transitions. [2021-06-05 07:06:54,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:54,858 INFO L276 IsEmpty]: Start isEmpty. Operand 9228 states and 21394 transitions. [2021-06-05 07:06:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:06:54,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:54,866 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:55,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2517 [2021-06-05 07:06:55,066 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:55,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:55,066 INFO L82 PathProgramCache]: Analyzing trace with hash -2038707397, now seen corresponding path program 152 times [2021-06-05 07:06:55,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:55,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8699185] [2021-06-05 07:06:55,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:55,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:55,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8699185] [2021-06-05 07:06:55,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8699185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:55,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134185559] [2021-06-05 07:06:55,323 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 [2021-06-05 07:06:55,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:06:55,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:55,348 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 07:06:55,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:56,058 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:56,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134185559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:56,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:56,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 07:06:56,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164116111] [2021-06-05 07:06:56,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:06:56,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:56,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:06:56,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:06:56,059 INFO L87 Difference]: Start difference. First operand 9228 states and 21394 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:59,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:59,084 INFO L93 Difference]: Finished difference Result 12038 states and 27683 transitions. [2021-06-05 07:06:59,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 07:06:59,084 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:06:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:59,096 INFO L225 Difference]: With dead ends: 12038 [2021-06-05 07:06:59,096 INFO L226 Difference]: Without dead ends: 11974 [2021-06-05 07:06:59,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2973 ImplicationChecksByTransitivity, 3038.5ms TimeCoverageRelationStatistics Valid=891, Invalid=8421, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 07:06:59,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11974 states. [2021-06-05 07:06:59,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11974 to 9402. [2021-06-05 07:06:59,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9402 states, 9401 states have (on average 2.3177321561536006) internal successors, (21789), 9401 states have internal predecessors, (21789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:59,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9402 states to 9402 states and 21789 transitions. [2021-06-05 07:06:59,206 INFO L78 Accepts]: Start accepts. Automaton has 9402 states and 21789 transitions. Word has length 37 [2021-06-05 07:06:59,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:59,206 INFO L482 AbstractCegarLoop]: Abstraction has 9402 states and 21789 transitions. [2021-06-05 07:06:59,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:59,206 INFO L276 IsEmpty]: Start isEmpty. Operand 9402 states and 21789 transitions. [2021-06-05 07:06:59,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:06:59,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:59,214 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:59,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2538,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:59,414 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:59,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:59,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1185168001, now seen corresponding path program 153 times [2021-06-05 07:06:59,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:59,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930300294] [2021-06-05 07:06:59,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:59,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:59,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930300294] [2021-06-05 07:06:59,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930300294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:59,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731643041] [2021-06-05 07:06:59,744 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 [2021-06-05 07:06:59,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 07:06:59,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:59,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 07:06:59,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:00,110 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:00,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731643041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:00,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:00,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2021-06-05 07:07:00,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483799456] [2021-06-05 07:07:00,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 07:07:00,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:00,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 07:07:00,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:07:00,111 INFO L87 Difference]: Start difference. First operand 9402 states and 21789 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:02,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:02,949 INFO L93 Difference]: Finished difference Result 13606 states and 31169 transitions. [2021-06-05 07:07:02,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 07:07:02,949 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:07:02,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:02,963 INFO L225 Difference]: With dead ends: 13606 [2021-06-05 07:07:02,963 INFO L226 Difference]: Without dead ends: 13480 [2021-06-05 07:07:02,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1885 ImplicationChecksByTransitivity, 2563.9ms TimeCoverageRelationStatistics Valid=981, Invalid=5991, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 07:07:02,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13480 states. [2021-06-05 07:07:03,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13480 to 9857. [2021-06-05 07:07:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9857 states, 9856 states have (on average 2.3118912337662336) internal successors, (22786), 9856 states have internal predecessors, (22786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9857 states to 9857 states and 22786 transitions. [2021-06-05 07:07:03,087 INFO L78 Accepts]: Start accepts. Automaton has 9857 states and 22786 transitions. Word has length 37 [2021-06-05 07:07:03,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:03,087 INFO L482 AbstractCegarLoop]: Abstraction has 9857 states and 22786 transitions. [2021-06-05 07:07:03,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:03,087 INFO L276 IsEmpty]: Start isEmpty. Operand 9857 states and 22786 transitions. [2021-06-05 07:07:03,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:07:03,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:03,095 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:03,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2555,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:03,296 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:03,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:03,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1157338053, now seen corresponding path program 154 times [2021-06-05 07:07:03,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:03,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814870830] [2021-06-05 07:07:03,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:03,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:03,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814870830] [2021-06-05 07:07:03,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814870830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:03,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853130112] [2021-06-05 07:07:03,634 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) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:03,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:07:03,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:03,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 07:07:03,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:04,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853130112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:04,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:04,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-06-05 07:07:04,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874693321] [2021-06-05 07:07:04,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 07:07:04,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:04,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 07:07:04,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:07:04,319 INFO L87 Difference]: Start difference. First operand 9857 states and 22786 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:09,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:09,891 INFO L93 Difference]: Finished difference Result 14288 states and 32546 transitions. [2021-06-05 07:07:09,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 07:07:09,891 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:07:09,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:09,905 INFO L225 Difference]: With dead ends: 14288 [2021-06-05 07:07:09,905 INFO L226 Difference]: Without dead ends: 14228 [2021-06-05 07:07:09,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4640 ImplicationChecksByTransitivity, 4928.5ms TimeCoverageRelationStatistics Valid=1717, Invalid=13289, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 07:07:09,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14228 states. [2021-06-05 07:07:10,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14228 to 10307. [2021-06-05 07:07:10,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10307 states, 10306 states have (on average 2.3123423248593054) internal successors, (23831), 10306 states have internal predecessors, (23831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:10,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10307 states to 10307 states and 23831 transitions. [2021-06-05 07:07:10,053 INFO L78 Accepts]: Start accepts. Automaton has 10307 states and 23831 transitions. Word has length 37 [2021-06-05 07:07:10,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:10,053 INFO L482 AbstractCegarLoop]: Abstraction has 10307 states and 23831 transitions. [2021-06-05 07:07:10,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:10,053 INFO L276 IsEmpty]: Start isEmpty. Operand 10307 states and 23831 transitions. [2021-06-05 07:07:10,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:07:10,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:10,062 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:10,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2563 [2021-06-05 07:07:10,262 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:10,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:10,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1911324613, now seen corresponding path program 155 times [2021-06-05 07:07:10,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:10,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5515536] [2021-06-05 07:07:10,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:10,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:10,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5515536] [2021-06-05 07:07:10,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5515536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:10,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536832507] [2021-06-05 07:07:10,517 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 [2021-06-05 07:07:10,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:07:10,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:10,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 07:07:10,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:10,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536832507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:10,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:10,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-06-05 07:07:10,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683837784] [2021-06-05 07:07:10,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 07:07:10,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:10,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 07:07:10,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:07:10,928 INFO L87 Difference]: Start difference. First operand 10307 states and 23831 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:13,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:13,768 INFO L93 Difference]: Finished difference Result 14681 states and 33701 transitions. [2021-06-05 07:07:13,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 07:07:13,768 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:07:13,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:13,784 INFO L225 Difference]: With dead ends: 14681 [2021-06-05 07:07:13,785 INFO L226 Difference]: Without dead ends: 14530 [2021-06-05 07:07:13,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 2529.4ms TimeCoverageRelationStatistics Valid=1147, Invalid=6685, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 07:07:13,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14530 states. [2021-06-05 07:07:13,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14530 to 10928. [2021-06-05 07:07:13,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10928 states, 10927 states have (on average 2.315914706689851) internal successors, (25306), 10927 states have internal predecessors, (25306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:13,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10928 states to 10928 states and 25306 transitions. [2021-06-05 07:07:13,938 INFO L78 Accepts]: Start accepts. Automaton has 10928 states and 25306 transitions. Word has length 37 [2021-06-05 07:07:13,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:13,938 INFO L482 AbstractCegarLoop]: Abstraction has 10928 states and 25306 transitions. [2021-06-05 07:07:13,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:13,938 INFO L276 IsEmpty]: Start isEmpty. Operand 10928 states and 25306 transitions. [2021-06-05 07:07:13,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:07:13,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:13,947 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:14,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2584 [2021-06-05 07:07:14,148 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:14,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:14,148 INFO L82 PathProgramCache]: Analyzing trace with hash 855717531, now seen corresponding path program 156 times [2021-06-05 07:07:14,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:14,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135938609] [2021-06-05 07:07:14,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:14,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:14,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135938609] [2021-06-05 07:07:14,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135938609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:14,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600127646] [2021-06-05 07:07:14,377 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 [2021-06-05 07:07:14,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 07:07:14,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:14,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 07:07:14,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:15,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600127646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:15,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:15,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-05 07:07:15,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566629800] [2021-06-05 07:07:15,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:07:15,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:15,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:07:15,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:07:15,111 INFO L87 Difference]: Start difference. First operand 10928 states and 25306 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:17,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:17,156 INFO L93 Difference]: Finished difference Result 14325 states and 32936 transitions. [2021-06-05 07:07:17,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:07:17,156 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 07:07:17,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:17,170 INFO L225 Difference]: With dead ends: 14325 [2021-06-05 07:07:17,171 INFO L226 Difference]: Without dead ends: 14232 [2021-06-05 07:07:17,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1923 ImplicationChecksByTransitivity, 1950.1ms TimeCoverageRelationStatistics Valid=872, Invalid=5448, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 07:07:17,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14232 states. [2021-06-05 07:07:17,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14232 to 11014. [2021-06-05 07:07:17,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11014 states, 11013 states have (on average 2.315990193407791) internal successors, (25506), 11013 states have internal predecessors, (25506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:17,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11014 states to 11014 states and 25506 transitions. [2021-06-05 07:07:17,329 INFO L78 Accepts]: Start accepts. Automaton has 11014 states and 25506 transitions. Word has length 39 [2021-06-05 07:07:17,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:17,329 INFO L482 AbstractCegarLoop]: Abstraction has 11014 states and 25506 transitions. [2021-06-05 07:07:17,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:17,329 INFO L276 IsEmpty]: Start isEmpty. Operand 11014 states and 25506 transitions. [2021-06-05 07:07:17,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:07:17,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:17,340 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:17,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2593,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:17,541 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:17,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:17,541 INFO L82 PathProgramCache]: Analyzing trace with hash 367286253, now seen corresponding path program 157 times [2021-06-05 07:07:17,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:17,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162065982] [2021-06-05 07:07:17,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:17,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:17,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162065982] [2021-06-05 07:07:17,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162065982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:17,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073200798] [2021-06-05 07:07:17,794 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 [2021-06-05 07:07:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:17,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 07:07:17,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:18,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073200798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:18,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:18,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-05 07:07:18,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668757759] [2021-06-05 07:07:18,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:07:18,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:18,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:07:18,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:07:18,423 INFO L87 Difference]: Start difference. First operand 11014 states and 25506 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:20,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:20,306 INFO L93 Difference]: Finished difference Result 14246 states and 32789 transitions. [2021-06-05 07:07:20,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 07:07:20,307 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 07:07:20,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:20,320 INFO L225 Difference]: With dead ends: 14246 [2021-06-05 07:07:20,320 INFO L226 Difference]: Without dead ends: 14165 [2021-06-05 07:07:20,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 1835.3ms TimeCoverageRelationStatistics Valid=732, Invalid=4818, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 07:07:20,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14165 states. [2021-06-05 07:07:20,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14165 to 11038. [2021-06-05 07:07:20,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11038 states, 11037 states have (on average 2.315484280148591) internal successors, (25556), 11037 states have internal predecessors, (25556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:20,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11038 states to 11038 states and 25556 transitions. [2021-06-05 07:07:20,460 INFO L78 Accepts]: Start accepts. Automaton has 11038 states and 25556 transitions. Word has length 39 [2021-06-05 07:07:20,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:20,460 INFO L482 AbstractCegarLoop]: Abstraction has 11038 states and 25556 transitions. [2021-06-05 07:07:20,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:20,460 INFO L276 IsEmpty]: Start isEmpty. Operand 11038 states and 25556 transitions. [2021-06-05 07:07:20,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:07:20,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:20,470 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:20,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2615,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:20,671 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:20,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:20,671 INFO L82 PathProgramCache]: Analyzing trace with hash 2065380333, now seen corresponding path program 158 times [2021-06-05 07:07:20,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:20,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025593104] [2021-06-05 07:07:20,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:20,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:20,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025593104] [2021-06-05 07:07:20,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025593104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:20,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899508783] [2021-06-05 07:07:20,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:20,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:07:20,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:20,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 07:07:20,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:21,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899508783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:21,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:21,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-05 07:07:21,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687562455] [2021-06-05 07:07:21,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:07:21,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:21,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:07:21,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:07:21,518 INFO L87 Difference]: Start difference. First operand 11038 states and 25556 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:24,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:24,316 INFO L93 Difference]: Finished difference Result 14589 states and 33530 transitions. [2021-06-05 07:07:24,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 07:07:24,316 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 07:07:24,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:24,329 INFO L225 Difference]: With dead ends: 14589 [2021-06-05 07:07:24,329 INFO L226 Difference]: Without dead ends: 14547 [2021-06-05 07:07:24,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 2565.8ms TimeCoverageRelationStatistics Valid=1213, Invalid=6797, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 07:07:24,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14547 states. [2021-06-05 07:07:24,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14547 to 11114. [2021-06-05 07:07:24,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11114 states, 11113 states have (on average 2.315666336722757) internal successors, (25734), 11113 states have internal predecessors, (25734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:24,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11114 states to 11114 states and 25734 transitions. [2021-06-05 07:07:24,476 INFO L78 Accepts]: Start accepts. Automaton has 11114 states and 25734 transitions. Word has length 39 [2021-06-05 07:07:24,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:24,477 INFO L482 AbstractCegarLoop]: Abstraction has 11114 states and 25734 transitions. [2021-06-05 07:07:24,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:24,477 INFO L276 IsEmpty]: Start isEmpty. Operand 11114 states and 25734 transitions. [2021-06-05 07:07:24,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:07:24,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:24,487 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:24,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2637 [2021-06-05 07:07:24,694 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:24,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:24,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1136965671, now seen corresponding path program 159 times [2021-06-05 07:07:24,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:24,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101637317] [2021-06-05 07:07:24,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:24,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:24,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101637317] [2021-06-05 07:07:24,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101637317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:24,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689219928] [2021-06-05 07:07:24,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:24,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 07:07:24,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:24,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 07:07:24,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:25,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689219928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:25,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:25,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-05 07:07:25,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144739894] [2021-06-05 07:07:25,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:07:25,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:25,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:07:25,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:07:25,611 INFO L87 Difference]: Start difference. First operand 11114 states and 25734 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:28,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:28,058 INFO L93 Difference]: Finished difference Result 14390 states and 33112 transitions. [2021-06-05 07:07:28,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:07:28,058 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 07:07:28,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:28,072 INFO L225 Difference]: With dead ends: 14390 [2021-06-05 07:07:28,072 INFO L226 Difference]: Without dead ends: 14297 [2021-06-05 07:07:28,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 2268.1ms TimeCoverageRelationStatistics Valid=852, Invalid=5468, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 07:07:28,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14297 states. [2021-06-05 07:07:28,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14297 to 11118. [2021-06-05 07:07:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11118 states, 11117 states have (on average 2.3155527570387693) internal successors, (25742), 11117 states have internal predecessors, (25742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:28,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11118 states to 11118 states and 25742 transitions. [2021-06-05 07:07:28,215 INFO L78 Accepts]: Start accepts. Automaton has 11118 states and 25742 transitions. Word has length 39 [2021-06-05 07:07:28,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:28,215 INFO L482 AbstractCegarLoop]: Abstraction has 11118 states and 25742 transitions. [2021-06-05 07:07:28,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:28,216 INFO L276 IsEmpty]: Start isEmpty. Operand 11118 states and 25742 transitions. [2021-06-05 07:07:28,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:07:28,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:28,226 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:28,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2660,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:28,427 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:28,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:28,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1459907545, now seen corresponding path program 160 times [2021-06-05 07:07:28,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:28,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215840750] [2021-06-05 07:07:28,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:28,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:28,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215840750] [2021-06-05 07:07:28,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215840750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:28,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674441788] [2021-06-05 07:07:28,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:28,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:07:28,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:28,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 07:07:28,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:29,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674441788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:29,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:29,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-05 07:07:29,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258434896] [2021-06-05 07:07:29,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:07:29,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:29,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:07:29,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:07:29,368 INFO L87 Difference]: Start difference. First operand 11118 states and 25742 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:32,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:32,472 INFO L93 Difference]: Finished difference Result 14835 states and 34081 transitions. [2021-06-05 07:07:32,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 07:07:32,472 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 07:07:32,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:32,486 INFO L225 Difference]: With dead ends: 14835 [2021-06-05 07:07:32,486 INFO L226 Difference]: Without dead ends: 14793 [2021-06-05 07:07:32,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2604 ImplicationChecksByTransitivity, 2933.3ms TimeCoverageRelationStatistics Valid=1393, Invalid=7349, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 07:07:32,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14793 states. [2021-06-05 07:07:32,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14793 to 11122. [2021-06-05 07:07:32,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11122 states, 11121 states have (on average 2.315439259059437) internal successors, (25750), 11121 states have internal predecessors, (25750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11122 states to 11122 states and 25750 transitions. [2021-06-05 07:07:32,627 INFO L78 Accepts]: Start accepts. Automaton has 11122 states and 25750 transitions. Word has length 39 [2021-06-05 07:07:32,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:32,627 INFO L482 AbstractCegarLoop]: Abstraction has 11122 states and 25750 transitions. [2021-06-05 07:07:32,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:32,627 INFO L276 IsEmpty]: Start isEmpty. Operand 11122 states and 25750 transitions. [2021-06-05 07:07:32,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:07:32,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:32,637 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:32,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2684 [2021-06-05 07:07:32,837 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:32,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:32,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1198285931, now seen corresponding path program 161 times [2021-06-05 07:07:32,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:32,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133840567] [2021-06-05 07:07:32,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:33,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:33,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133840567] [2021-06-05 07:07:33,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133840567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:33,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604638485] [2021-06-05 07:07:33,057 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:33,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 07:07:33,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:33,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 07:07:33,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:33,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604638485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:33,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:33,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-05 07:07:33,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569780652] [2021-06-05 07:07:33,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:07:33,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:33,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:07:33,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:07:33,839 INFO L87 Difference]: Start difference. First operand 11122 states and 25750 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:37,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:37,984 INFO L93 Difference]: Finished difference Result 15432 states and 35365 transitions. [2021-06-05 07:07:37,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 07:07:37,985 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 07:07:37,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:38,001 INFO L225 Difference]: With dead ends: 15432 [2021-06-05 07:07:38,001 INFO L226 Difference]: Without dead ends: 15390 [2021-06-05 07:07:38,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4288 ImplicationChecksByTransitivity, 3863.9ms TimeCoverageRelationStatistics Valid=1894, Invalid=10762, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 07:07:38,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15390 states. [2021-06-05 07:07:38,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15390 to 11226. [2021-06-05 07:07:38,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11226 states, 11225 states have (on average 2.31554565701559) internal successors, (25992), 11225 states have internal predecessors, (25992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:38,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11226 states to 11226 states and 25992 transitions. [2021-06-05 07:07:38,150 INFO L78 Accepts]: Start accepts. Automaton has 11226 states and 25992 transitions. Word has length 39 [2021-06-05 07:07:38,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:38,150 INFO L482 AbstractCegarLoop]: Abstraction has 11226 states and 25992 transitions. [2021-06-05 07:07:38,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:38,151 INFO L276 IsEmpty]: Start isEmpty. Operand 11226 states and 25992 transitions. [2021-06-05 07:07:38,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:07:38,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:38,160 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:38,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2705,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:38,361 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:38,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:38,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1315146321, now seen corresponding path program 162 times [2021-06-05 07:07:38,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:38,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372818062] [2021-06-05 07:07:38,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:38,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:38,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372818062] [2021-06-05 07:07:38,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372818062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:38,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382263660] [2021-06-05 07:07:38,583 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:38,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 07:07:38,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:38,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 07:07:38,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:39,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382263660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:39,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:39,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-05 07:07:39,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483856313] [2021-06-05 07:07:39,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:07:39,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:39,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:07:39,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:07:39,335 INFO L87 Difference]: Start difference. First operand 11226 states and 25992 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:43,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:43,941 INFO L93 Difference]: Finished difference Result 15857 states and 36251 transitions. [2021-06-05 07:07:43,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 07:07:43,942 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 07:07:43,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:43,955 INFO L225 Difference]: With dead ends: 15857 [2021-06-05 07:07:43,955 INFO L226 Difference]: Without dead ends: 15815 [2021-06-05 07:07:43,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5462 ImplicationChecksByTransitivity, 4167.7ms TimeCoverageRelationStatistics Valid=2226, Invalid=13274, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 07:07:43,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15815 states. [2021-06-05 07:07:44,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15815 to 11354. [2021-06-05 07:07:44,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11354 states, 11353 states have (on average 2.3170968026072405) internal successors, (26306), 11353 states have internal predecessors, (26306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11354 states to 11354 states and 26306 transitions. [2021-06-05 07:07:44,105 INFO L78 Accepts]: Start accepts. Automaton has 11354 states and 26306 transitions. Word has length 39 [2021-06-05 07:07:44,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:44,105 INFO L482 AbstractCegarLoop]: Abstraction has 11354 states and 26306 transitions. [2021-06-05 07:07:44,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:44,105 INFO L276 IsEmpty]: Start isEmpty. Operand 11354 states and 26306 transitions. [2021-06-05 07:07:44,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:07:44,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:44,115 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:44,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2731 [2021-06-05 07:07:44,316 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:44,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:44,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1603794957, now seen corresponding path program 163 times [2021-06-05 07:07:44,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:44,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873337653] [2021-06-05 07:07:44,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:44,569 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:44,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:44,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873337653] [2021-06-05 07:07:44,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873337653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:44,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541273313] [2021-06-05 07:07:44,569 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:44,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 07:07:44,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:45,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541273313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:45,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:45,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-05 07:07:45,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693348456] [2021-06-05 07:07:45,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 07:07:45,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:45,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 07:07:45,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 07:07:45,274 INFO L87 Difference]: Start difference. First operand 11354 states and 26306 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:50,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:50,501 INFO L93 Difference]: Finished difference Result 16704 states and 38033 transitions. [2021-06-05 07:07:50,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 07:07:50,501 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 07:07:50,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:50,519 INFO L225 Difference]: With dead ends: 16704 [2021-06-05 07:07:50,519 INFO L226 Difference]: Without dead ends: 16655 [2021-06-05 07:07:50,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6247 ImplicationChecksByTransitivity, 4670.7ms TimeCoverageRelationStatistics Valid=2587, Invalid=15235, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 07:07:50,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16655 states. [2021-06-05 07:07:50,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16655 to 11527. [2021-06-05 07:07:50,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11527 states, 11526 states have (on average 2.318931112267916) internal successors, (26728), 11526 states have internal predecessors, (26728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:50,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11527 states to 11527 states and 26728 transitions. [2021-06-05 07:07:50,676 INFO L78 Accepts]: Start accepts. Automaton has 11527 states and 26728 transitions. Word has length 39 [2021-06-05 07:07:50,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:50,676 INFO L482 AbstractCegarLoop]: Abstraction has 11527 states and 26728 transitions. [2021-06-05 07:07:50,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:50,676 INFO L276 IsEmpty]: Start isEmpty. Operand 11527 states and 26728 transitions. [2021-06-05 07:07:50,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 07:07:50,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:50,686 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:50,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2755 [2021-06-05 07:07:50,887 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:50,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:50,887 INFO L82 PathProgramCache]: Analyzing trace with hash -692364489, now seen corresponding path program 164 times [2021-06-05 07:07:50,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:50,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454178466] [2021-06-05 07:07:50,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:51,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:51,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454178466] [2021-06-05 07:07:51,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454178466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:51,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53492222] [2021-06-05 07:07:51,137 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:51,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:07:51,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:51,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 07:07:51,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-06-05 07:10:43,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2777 [2021-06-05 07:10:43,825 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 07:10:43,826 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 07:10:43,829 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 07:10:43,829 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 07:10:43 BasicIcfg [2021-06-05 07:10:43,829 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 07:10:43,830 INFO L168 Benchmark]: Toolchain (without parser) took 803068.85 ms. Allocated memory was 381.7 MB in the beginning and 2.0 GB in the end (delta: 1.6 GB). Free memory was 361.0 MB in the beginning and 1.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.3 GB. Max. memory is 16.0 GB. [2021-06-05 07:10:43,830 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 381.7 MB. Free memory was 362.2 MB in the beginning and 362.1 MB in the end (delta: 75.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:10:43,830 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.04 ms. Allocated memory is still 381.7 MB. Free memory was 361.0 MB in the beginning and 359.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 07:10:43,830 INFO L168 Benchmark]: Boogie Preprocessor took 10.60 ms. Allocated memory is still 381.7 MB. Free memory was 359.5 MB in the beginning and 358.6 MB in the end (delta: 925.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 07:10:43,830 INFO L168 Benchmark]: RCFGBuilder took 201.38 ms. Allocated memory is still 381.7 MB. Free memory was 358.5 MB in the beginning and 347.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 07:10:43,830 INFO L168 Benchmark]: TraceAbstraction took 802832.73 ms. Allocated memory was 381.7 MB in the beginning and 2.0 GB in the end (delta: 1.6 GB). Free memory was 346.8 MB in the beginning and 1.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.3 GB. Max. memory is 16.0 GB. [2021-06-05 07:10:43,830 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 381.7 MB. Free memory was 362.2 MB in the beginning and 362.1 MB in the end (delta: 75.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.04 ms. Allocated memory is still 381.7 MB. Free memory was 361.0 MB in the beginning and 359.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.60 ms. Allocated memory is still 381.7 MB. Free memory was 359.5 MB in the beginning and 358.6 MB in the end (delta: 925.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 201.38 ms. Allocated memory is still 381.7 MB. Free memory was 358.5 MB in the beginning and 347.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 802832.73 ms. Allocated memory was 381.7 MB in the beginning and 2.0 GB in the end (delta: 1.6 GB). Free memory was 346.8 MB in the beginning and 1.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.3 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 40 with TraceHistMax 6,while TraceCheckSpWp was constructing forward predicates,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 40 with TraceHistMax 6,while TraceCheckSpWp was constructing forward predicates,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 40 with TraceHistMax 6,while TraceCheckSpWp was constructing forward predicates,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 802712.2ms, OverallIterations: 166, TraceHistogramMax: 6, EmptinessCheckTime: 605.8ms, AutomataDifference: 466548.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6393 SDtfs, 47991 SDslu, 100389 SDs, 0 SdLazy, 260623 SolverSat, 16321 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 96690.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17246 GetRequests, 3255 SyntacticMatches, 191 SemanticMatches, 13800 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454627 ImplicationChecksByTransitivity, 433566.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11527occurred in iteration=165, InterpolantAutomatonStates: 10321, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7841.1ms AutomataMinimizationTime, 165 MinimizatonAttempts, 212945 StatesRemovedByMinimization, 165 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 461.1ms SsaConstructionTime, 2104.2ms SatisfiabilityAnalysisTime, 115517.2ms InterpolantComputationTime, 11094 NumberOfCodeBlocks, 11094 NumberOfCodeBlocksAsserted, 771 NumberOfCheckSat, 10766 ConstructedInterpolants, 0 QuantifiedInterpolants, 179406 SizeOfPredicates, 718 NumberOfNonLiveVariables, 12442 ConjunctsInSsa, 5374 ConjunctsInUnsatCore, 328 InterpolantComputations, 2 PerfectInterpolantSequences, 505/15371 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown