/usr/bin/java -Xmx8000000000 -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/parallel/misc-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:51:13,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:51:13,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:51:13,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:51:13,370 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 [2021-07-13 19:51:13,409 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:51:13,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:51:13,409 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:51:13,410 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:51:13,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:51:13,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:51:13,412 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:51:13,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:51:13,413 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:51:13,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:51:13,413 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:51:13,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:51:13,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:51:13,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:51:13,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:51:13,414 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:51:13,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:51:13,415 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:51:13,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:51:13,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:51:13,415 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:51:13,415 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:51:13,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:51:13,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:51:13,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:51:13,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:51:13,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:51:13,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:51:13,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:51:13,417 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:51:13,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:51:13,417 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:51:13,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:51:13,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:51:13,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:51:13,766 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:51:13,768 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:51:13,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl [2021-07-13 19:51:13,769 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl' [2021-07-13 19:51:13,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:51:13,801 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:51:13,803 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:51:13,803 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:51:13,803 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:51:13,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:13" (1/1) ... [2021-07-13 19:51:13,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:13" (1/1) ... [2021-07-13 19:51:13,829 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:51:13,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:51:13,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:51:13,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:51:13,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:13" (1/1) ... [2021-07-13 19:51:13,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:13" (1/1) ... [2021-07-13 19:51:13,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:13" (1/1) ... [2021-07-13 19:51:13,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:13" (1/1) ... [2021-07-13 19:51:13,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:13" (1/1) ... [2021-07-13 19:51:13,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:13" (1/1) ... [2021-07-13 19:51:13,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:13" (1/1) ... [2021-07-13 19:51:13,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:51:13,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:51:13,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:51:13,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:51:13,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:13" (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 [2021-07-13 19:51:14,112 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:51:14,113 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:51:14,113 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:51:14,113 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:51:14,113 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:51:14,113 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:51:14,113 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:51:14,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:51:14,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:51:14,114 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:51:14,269 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:51:14,269 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 19:51:14,271 INFO L202 PluginConnector]: Adding new model misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:51:14 BoogieIcfgContainer [2021-07-13 19:51:14,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:51:14,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:51:14,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:51:14,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:51:14,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:51:13" (1/2) ... [2021-07-13 19:51:14,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eab2a83 and model type misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:51:14, skipping insertion in model container [2021-07-13 19:51:14,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:51:14" (2/2) ... [2021-07-13 19:51:14,277 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-2.wvr.bpl [2021-07-13 19:51:14,282 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:51:14,283 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:51:14,284 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:51:14,284 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:51:14,348 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 19:51:14,380 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 19:51:14,408 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:51:14,408 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:51:14,409 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:51:14,409 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:51:14,409 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:51:14,409 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:51:14,409 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:51:14,409 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:51:14,436 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 29 transitions, 74 flow [2021-07-13 19:51:14,462 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 85 states, 84 states have (on average 2.1785714285714284) internal successors, (183), 84 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:14,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 84 states have (on average 2.1785714285714284) internal successors, (183), 84 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:14,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:51:14,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:14,474 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:14,474 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:14,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:14,483 INFO L82 PathProgramCache]: Analyzing trace with hash -523912972, now seen corresponding path program 1 times [2021-07-13 19:51:14,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:14,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741301843] [2021-07-13 19:51:14,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:14,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:14,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741301843] [2021-07-13 19:51:14,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741301843] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:51:14,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:51:14,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 19:51:14,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360497908] [2021-07-13 19:51:14,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:51:14,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:14,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:51:14,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:51:14,646 INFO L87 Difference]: Start difference. First operand has 85 states, 84 states have (on average 2.1785714285714284) internal successors, (183), 84 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:14,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:14,696 INFO L93 Difference]: Finished difference Result 134 states and 294 transitions. [2021-07-13 19:51:14,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:51:14,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:51:14,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:14,727 INFO L225 Difference]: With dead ends: 134 [2021-07-13 19:51:14,727 INFO L226 Difference]: Without dead ends: 127 [2021-07-13 19:51:14,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:51:14,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-13 19:51:14,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 94. [2021-07-13 19:51:14,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.161290322580645) internal successors, (201), 93 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:14,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 201 transitions. [2021-07-13 19:51:14,788 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 201 transitions. Word has length 11 [2021-07-13 19:51:14,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:14,788 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 201 transitions. [2021-07-13 19:51:14,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:14,788 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 201 transitions. [2021-07-13 19:51:14,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:51:14,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:14,792 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:14,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:51:14,792 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:14,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:14,797 INFO L82 PathProgramCache]: Analyzing trace with hash -903627706, now seen corresponding path program 1 times [2021-07-13 19:51:14,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:14,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325755967] [2021-07-13 19:51:14,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:14,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:14,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325755967] [2021-07-13 19:51:14,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325755967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:14,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105738193] [2021-07-13 19:51:14,869 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 [2021-07-13 19:51:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:14,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 19:51:14,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:15,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105738193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:15,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:15,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-13 19:51:15,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027070771] [2021-07-13 19:51:15,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:51:15,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:15,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:51:15,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:51:15,031 INFO L87 Difference]: Start difference. First operand 94 states and 201 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:15,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:15,100 INFO L93 Difference]: Finished difference Result 169 states and 356 transitions. [2021-07-13 19:51:15,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:51:15,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:51:15,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:15,105 INFO L225 Difference]: With dead ends: 169 [2021-07-13 19:51:15,105 INFO L226 Difference]: Without dead ends: 169 [2021-07-13 19:51:15,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:51:15,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-13 19:51:15,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2021-07-13 19:51:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.185567010309278) internal successors, (212), 97 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2021-07-13 19:51:15,120 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 16 [2021-07-13 19:51:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:15,121 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2021-07-13 19:51:15,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2021-07-13 19:51:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:51:15,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:15,122 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:15,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 19:51:15,323 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:15,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:15,323 INFO L82 PathProgramCache]: Analyzing trace with hash -965799907, now seen corresponding path program 1 times [2021-07-13 19:51:15,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:15,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948633868] [2021-07-13 19:51:15,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:15,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:15,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948633868] [2021-07-13 19:51:15,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948633868] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:51:15,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:51:15,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:51:15,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435771916] [2021-07-13 19:51:15,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:51:15,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:15,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:51:15,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:51:15,369 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:15,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:15,421 INFO L93 Difference]: Finished difference Result 188 states and 400 transitions. [2021-07-13 19:51:15,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:51:15,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:51:15,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:15,424 INFO L225 Difference]: With dead ends: 188 [2021-07-13 19:51:15,428 INFO L226 Difference]: Without dead ends: 183 [2021-07-13 19:51:15,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:51:15,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-13 19:51:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 122. [2021-07-13 19:51:15,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1735537190082646) internal successors, (263), 121 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:15,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 263 transitions. [2021-07-13 19:51:15,436 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 263 transitions. Word has length 16 [2021-07-13 19:51:15,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:15,436 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 263 transitions. [2021-07-13 19:51:15,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:15,436 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 263 transitions. [2021-07-13 19:51:15,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:51:15,437 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:15,438 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:15,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:51:15,438 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:15,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:15,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1768119819, now seen corresponding path program 2 times [2021-07-13 19:51:15,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:15,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635467239] [2021-07-13 19:51:15,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:15,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:15,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635467239] [2021-07-13 19:51:15,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635467239] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:51:15,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:51:15,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:51:15,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244204158] [2021-07-13 19:51:15,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:51:15,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:15,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:51:15,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:51:15,485 INFO L87 Difference]: Start difference. First operand 122 states and 263 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:15,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:15,524 INFO L93 Difference]: Finished difference Result 156 states and 342 transitions. [2021-07-13 19:51:15,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:51:15,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:51:15,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:15,526 INFO L225 Difference]: With dead ends: 156 [2021-07-13 19:51:15,526 INFO L226 Difference]: Without dead ends: 156 [2021-07-13 19:51:15,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:51:15,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-13 19:51:15,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 104. [2021-07-13 19:51:15,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.174757281553398) internal successors, (224), 103 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:15,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 224 transitions. [2021-07-13 19:51:15,544 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 224 transitions. Word has length 16 [2021-07-13 19:51:15,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:15,545 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 224 transitions. [2021-07-13 19:51:15,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:15,545 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 224 transitions. [2021-07-13 19:51:15,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:51:15,547 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:15,547 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:15,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 19:51:15,547 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:15,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:15,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1004932738, now seen corresponding path program 2 times [2021-07-13 19:51:15,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:15,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381880683] [2021-07-13 19:51:15,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:15,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:15,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381880683] [2021-07-13 19:51:15,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381880683] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:51:15,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:51:15,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:51:15,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417107882] [2021-07-13 19:51:15,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:51:15,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:15,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:51:15,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:51:15,593 INFO L87 Difference]: Start difference. First operand 104 states and 224 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:15,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:15,631 INFO L93 Difference]: Finished difference Result 156 states and 340 transitions. [2021-07-13 19:51:15,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:51:15,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:51:15,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:15,633 INFO L225 Difference]: With dead ends: 156 [2021-07-13 19:51:15,633 INFO L226 Difference]: Without dead ends: 154 [2021-07-13 19:51:15,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:51:15,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-07-13 19:51:15,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 104. [2021-07-13 19:51:15,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:15,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 223 transitions. [2021-07-13 19:51:15,646 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 223 transitions. Word has length 16 [2021-07-13 19:51:15,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:15,646 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 223 transitions. [2021-07-13 19:51:15,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:15,646 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 223 transitions. [2021-07-13 19:51:15,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:51:15,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:15,650 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:15,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 19:51:15,650 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:15,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:15,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1303883765, now seen corresponding path program 1 times [2021-07-13 19:51:15,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:15,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067406406] [2021-07-13 19:51:15,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:15,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:15,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067406406] [2021-07-13 19:51:15,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067406406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:15,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208744496] [2021-07-13 19:51:15,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:15,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:51:15,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:15,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208744496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:15,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:15,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-07-13 19:51:15,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593279290] [2021-07-13 19:51:15,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:51:15,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:15,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:51:15,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:51:15,939 INFO L87 Difference]: Start difference. First operand 104 states and 223 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:16,060 INFO L93 Difference]: Finished difference Result 226 states and 505 transitions. [2021-07-13 19:51:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:51:16,061 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:51:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:16,062 INFO L225 Difference]: With dead ends: 226 [2021-07-13 19:51:16,063 INFO L226 Difference]: Without dead ends: 226 [2021-07-13 19:51:16,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:51:16,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-07-13 19:51:16,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 164. [2021-07-13 19:51:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.2024539877300615) internal successors, (359), 163 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:16,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 359 transitions. [2021-07-13 19:51:16,071 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 359 transitions. Word has length 21 [2021-07-13 19:51:16,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:16,072 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 359 transitions. [2021-07-13 19:51:16,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:16,072 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 359 transitions. [2021-07-13 19:51:16,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:51:16,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:16,074 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:16,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:16,296 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:16,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:16,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1315462331, now seen corresponding path program 2 times [2021-07-13 19:51:16,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:16,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654751953] [2021-07-13 19:51:16,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:16,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:16,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654751953] [2021-07-13 19:51:16,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654751953] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:51:16,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:51:16,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:51:16,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808603282] [2021-07-13 19:51:16,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:51:16,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:16,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:51:16,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:51:16,328 INFO L87 Difference]: Start difference. First operand 164 states and 359 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:16,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:16,340 INFO L93 Difference]: Finished difference Result 266 states and 560 transitions. [2021-07-13 19:51:16,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:51:16,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:51:16,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:16,342 INFO L225 Difference]: With dead ends: 266 [2021-07-13 19:51:16,342 INFO L226 Difference]: Without dead ends: 266 [2021-07-13 19:51:16,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:51:16,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-07-13 19:51:16,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 234. [2021-07-13 19:51:16,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.171673819742489) internal successors, (506), 233 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) [2021-07-13 19:51:16,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 506 transitions. [2021-07-13 19:51:16,351 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 506 transitions. Word has length 26 [2021-07-13 19:51:16,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:16,351 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 506 transitions. [2021-07-13 19:51:16,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:16,351 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 506 transitions. [2021-07-13 19:51:16,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:51:16,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:16,352 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:16,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 19:51:16,353 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:16,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:16,353 INFO L82 PathProgramCache]: Analyzing trace with hash -2136729445, now seen corresponding path program 1 times [2021-07-13 19:51:16,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:16,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291135340] [2021-07-13 19:51:16,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:16,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:16,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291135340] [2021-07-13 19:51:16,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291135340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:16,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112699206] [2021-07-13 19:51:16,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:16,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:51:16,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:16,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112699206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:16,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:16,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:51:16,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434782775] [2021-07-13 19:51:16,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:51:16,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:16,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:51:16,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:51:16,549 INFO L87 Difference]: Start difference. First operand 234 states and 506 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:16,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:16,632 INFO L93 Difference]: Finished difference Result 562 states and 1200 transitions. [2021-07-13 19:51:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:51:16,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:51:16,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:16,636 INFO L225 Difference]: With dead ends: 562 [2021-07-13 19:51:16,636 INFO L226 Difference]: Without dead ends: 562 [2021-07-13 19:51:16,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:51:16,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-07-13 19:51:16,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 438. [2021-07-13 19:51:16,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.265446224256293) internal successors, (990), 437 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:16,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 990 transitions. [2021-07-13 19:51:16,653 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 990 transitions. Word has length 26 [2021-07-13 19:51:16,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:16,653 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 990 transitions. [2021-07-13 19:51:16,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:16,653 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 990 transitions. [2021-07-13 19:51:16,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:51:16,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:16,655 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:16,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:16,869 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:16,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:16,869 INFO L82 PathProgramCache]: Analyzing trace with hash -295197091, now seen corresponding path program 2 times [2021-07-13 19:51:16,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:16,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157324042] [2021-07-13 19:51:16,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:16,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:16,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157324042] [2021-07-13 19:51:16,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157324042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:16,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558594563] [2021-07-13 19:51:16,910 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 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 [2021-07-13 19:51:16,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:16,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:16,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:51:16,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:17,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558594563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:17,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:17,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 19:51:17,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128753998] [2021-07-13 19:51:17,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:51:17,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:17,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:51:17,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:51:17,015 INFO L87 Difference]: Start difference. First operand 438 states and 990 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:17,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:17,078 INFO L93 Difference]: Finished difference Result 491 states and 1077 transitions. [2021-07-13 19:51:17,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:51:17,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:51:17,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:17,084 INFO L225 Difference]: With dead ends: 491 [2021-07-13 19:51:17,084 INFO L226 Difference]: Without dead ends: 487 [2021-07-13 19:51:17,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:51:17,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-07-13 19:51:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 440. [2021-07-13 19:51:17,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.2574031890660593) internal successors, (991), 439 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:17,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 991 transitions. [2021-07-13 19:51:17,097 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 991 transitions. Word has length 26 [2021-07-13 19:51:17,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:17,097 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 991 transitions. [2021-07-13 19:51:17,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:17,097 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 991 transitions. [2021-07-13 19:51:17,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:51:17,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:17,099 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:17,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:17,313 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:17,313 INFO L82 PathProgramCache]: Analyzing trace with hash 11065031, now seen corresponding path program 3 times [2021-07-13 19:51:17,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:17,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501954464] [2021-07-13 19:51:17,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:17,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:17,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501954464] [2021-07-13 19:51:17,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501954464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:17,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281618914] [2021-07-13 19:51:17,358 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 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 [2021-07-13 19:51:17,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:51:17,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:17,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:51:17,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:17,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281618914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:17,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:17,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 19:51:17,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874663653] [2021-07-13 19:51:17,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:51:17,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:17,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:51:17,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:51:17,454 INFO L87 Difference]: Start difference. First operand 440 states and 991 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:17,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:17,504 INFO L93 Difference]: Finished difference Result 771 states and 1695 transitions. [2021-07-13 19:51:17,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:51:17,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:51:17,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:17,511 INFO L225 Difference]: With dead ends: 771 [2021-07-13 19:51:17,511 INFO L226 Difference]: Without dead ends: 771 [2021-07-13 19:51:17,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:51:17,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-07-13 19:51:17,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 634. [2021-07-13 19:51:17,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.3175355450236967) internal successors, (1467), 633 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:17,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1467 transitions. [2021-07-13 19:51:17,528 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1467 transitions. Word has length 26 [2021-07-13 19:51:17,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:17,528 INFO L482 AbstractCegarLoop]: Abstraction has 634 states and 1467 transitions. [2021-07-13 19:51:17,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:17,529 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1467 transitions. [2021-07-13 19:51:17,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:51:17,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:17,530 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:17,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 19:51:17,745 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:17,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:17,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1181121031, now seen corresponding path program 4 times [2021-07-13 19:51:17,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:17,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819488013] [2021-07-13 19:51:17,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:17,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:17,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:17,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819488013] [2021-07-13 19:51:17,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819488013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:17,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119360460] [2021-07-13 19:51:17,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:51:17,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:17,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:17,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:51:17,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:17,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119360460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:17,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:17,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 19:51:17,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866236949] [2021-07-13 19:51:17,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:51:17,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:17,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:51:17,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:51:17,896 INFO L87 Difference]: Start difference. First operand 634 states and 1467 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:17,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:17,951 INFO L93 Difference]: Finished difference Result 763 states and 1678 transitions. [2021-07-13 19:51:17,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:51:17,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:51:17,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:17,955 INFO L225 Difference]: With dead ends: 763 [2021-07-13 19:51:17,955 INFO L226 Difference]: Without dead ends: 759 [2021-07-13 19:51:17,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:51:17,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-07-13 19:51:17,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 634. [2021-07-13 19:51:17,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.3143759873617693) internal successors, (1465), 633 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1465 transitions. [2021-07-13 19:51:17,974 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1465 transitions. Word has length 26 [2021-07-13 19:51:17,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:17,974 INFO L482 AbstractCegarLoop]: Abstraction has 634 states and 1465 transitions. [2021-07-13 19:51:17,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:17,974 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1465 transitions. [2021-07-13 19:51:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:51:17,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:17,976 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:18,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:18,200 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:18,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:18,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1355618835, now seen corresponding path program 5 times [2021-07-13 19:51:18,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:18,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310791554] [2021-07-13 19:51:18,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:18,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:18,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310791554] [2021-07-13 19:51:18,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310791554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:18,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544800397] [2021-07-13 19:51:18,242 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 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 [2021-07-13 19:51:18,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:51:18,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:18,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:51:18,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:18,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544800397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:18,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:18,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:51:18,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086123851] [2021-07-13 19:51:18,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:51:18,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:18,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:51:18,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:51:18,340 INFO L87 Difference]: Start difference. First operand 634 states and 1465 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:18,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:18,421 INFO L93 Difference]: Finished difference Result 741 states and 1639 transitions. [2021-07-13 19:51:18,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:51:18,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:51:18,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:18,425 INFO L225 Difference]: With dead ends: 741 [2021-07-13 19:51:18,425 INFO L226 Difference]: Without dead ends: 721 [2021-07-13 19:51:18,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:51:18,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-07-13 19:51:18,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 654. [2021-07-13 19:51:18,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.2833078101071975) internal successors, (1491), 653 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:18,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1491 transitions. [2021-07-13 19:51:18,443 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1491 transitions. Word has length 26 [2021-07-13 19:51:18,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:18,443 INFO L482 AbstractCegarLoop]: Abstraction has 654 states and 1491 transitions. [2021-07-13 19:51:18,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:18,444 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1491 transitions. [2021-07-13 19:51:18,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:51:18,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:18,446 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:18,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:18,666 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:18,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:18,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1699913514, now seen corresponding path program 6 times [2021-07-13 19:51:18,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:18,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100956298] [2021-07-13 19:51:18,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 19:51:18,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:18,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100956298] [2021-07-13 19:51:18,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100956298] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:51:18,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:51:18,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:51:18,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299064721] [2021-07-13 19:51:18,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:51:18,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:18,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:51:18,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:51:18,688 INFO L87 Difference]: Start difference. First operand 654 states and 1491 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:18,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:18,703 INFO L93 Difference]: Finished difference Result 1106 states and 2391 transitions. [2021-07-13 19:51:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:51:18,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:51:18,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:18,708 INFO L225 Difference]: With dead ends: 1106 [2021-07-13 19:51:18,708 INFO L226 Difference]: Without dead ends: 1106 [2021-07-13 19:51:18,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:51:18,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-07-13 19:51:18,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1035. [2021-07-13 19:51:18,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1034 states have (on average 2.2030947775628626) internal successors, (2278), 1034 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 2278 transitions. [2021-07-13 19:51:18,733 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 2278 transitions. Word has length 31 [2021-07-13 19:51:18,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:18,733 INFO L482 AbstractCegarLoop]: Abstraction has 1035 states and 2278 transitions. [2021-07-13 19:51:18,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:18,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 2278 transitions. [2021-07-13 19:51:18,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:51:18,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:18,735 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:18,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-13 19:51:18,736 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:18,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:18,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1635269386, now seen corresponding path program 1 times [2021-07-13 19:51:18,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:18,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371177345] [2021-07-13 19:51:18,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:51:18,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:18,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371177345] [2021-07-13 19:51:18,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371177345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:18,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118332617] [2021-07-13 19:51:18,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:18,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:51:18,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:51:18,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118332617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:18,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:18,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 19:51:18,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193637485] [2021-07-13 19:51:18,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:51:18,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:18,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:51:18,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:51:18,929 INFO L87 Difference]: Start difference. First operand 1035 states and 2278 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:18,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:18,966 INFO L93 Difference]: Finished difference Result 1734 states and 3766 transitions. [2021-07-13 19:51:18,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:51:18,966 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:51:18,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:18,973 INFO L225 Difference]: With dead ends: 1734 [2021-07-13 19:51:18,973 INFO L226 Difference]: Without dead ends: 1715 [2021-07-13 19:51:18,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:51:18,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-07-13 19:51:19,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1571. [2021-07-13 19:51:19,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.212738853503185) internal successors, (3474), 1570 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:19,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 3474 transitions. [2021-07-13 19:51:19,010 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 3474 transitions. Word has length 31 [2021-07-13 19:51:19,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:19,010 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 3474 transitions. [2021-07-13 19:51:19,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:19,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 3474 transitions. [2021-07-13 19:51:19,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:51:19,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:19,013 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:19,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 19:51:19,229 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:19,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:19,229 INFO L82 PathProgramCache]: Analyzing trace with hash -900951882, now seen corresponding path program 2 times [2021-07-13 19:51:19,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:19,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013571811] [2021-07-13 19:51:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:51:19,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:19,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013571811] [2021-07-13 19:51:19,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013571811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:19,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342271362] [2021-07-13 19:51:19,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:19,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:19,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:19,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:51:19,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:51:19,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342271362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:19,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:19,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 19:51:19,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389322888] [2021-07-13 19:51:19,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:51:19,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:19,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:51:19,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:51:19,437 INFO L87 Difference]: Start difference. First operand 1571 states and 3474 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:19,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:19,480 INFO L93 Difference]: Finished difference Result 2696 states and 5884 transitions. [2021-07-13 19:51:19,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:51:19,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:51:19,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:19,492 INFO L225 Difference]: With dead ends: 2696 [2021-07-13 19:51:19,492 INFO L226 Difference]: Without dead ends: 2677 [2021-07-13 19:51:19,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:51:19,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-07-13 19:51:19,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 2412. [2021-07-13 19:51:19,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 2.2310244711737868) internal successors, (5379), 2411 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:19,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 5379 transitions. [2021-07-13 19:51:19,558 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 5379 transitions. Word has length 31 [2021-07-13 19:51:19,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:19,559 INFO L482 AbstractCegarLoop]: Abstraction has 2412 states and 5379 transitions. [2021-07-13 19:51:19,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:19,559 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 5379 transitions. [2021-07-13 19:51:19,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:51:19,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:19,566 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:19,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 19:51:19,781 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:19,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:19,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1275162418, now seen corresponding path program 3 times [2021-07-13 19:51:19,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:19,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584515892] [2021-07-13 19:51:19,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:19,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:19,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:19,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584515892] [2021-07-13 19:51:19,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584515892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:19,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990233817] [2021-07-13 19:51:19,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:19,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:51:19,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:19,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:51:19,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:19,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990233817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:19,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:19,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:51:19,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071802757] [2021-07-13 19:51:19,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:51:19,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:19,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:51:19,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:51:19,958 INFO L87 Difference]: Start difference. First operand 2412 states and 5379 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:20,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:20,027 INFO L93 Difference]: Finished difference Result 4261 states and 9366 transitions. [2021-07-13 19:51:20,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:51:20,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:51:20,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:20,045 INFO L225 Difference]: With dead ends: 4261 [2021-07-13 19:51:20,045 INFO L226 Difference]: Without dead ends: 4236 [2021-07-13 19:51:20,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:51:20,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4236 states. [2021-07-13 19:51:20,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4236 to 3410. [2021-07-13 19:51:20,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 3409 states have (on average 2.24435318275154) internal successors, (7651), 3409 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:20,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 7651 transitions. [2021-07-13 19:51:20,155 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 7651 transitions. Word has length 31 [2021-07-13 19:51:20,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:20,155 INFO L482 AbstractCegarLoop]: Abstraction has 3410 states and 7651 transitions. [2021-07-13 19:51:20,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:20,155 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 7651 transitions. [2021-07-13 19:51:20,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:51:20,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:20,161 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:20,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 19:51:20,381 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:20,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:20,381 INFO L82 PathProgramCache]: Analyzing trace with hash -86510450, now seen corresponding path program 4 times [2021-07-13 19:51:20,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:20,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627155202] [2021-07-13 19:51:20,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:20,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:20,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:20,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627155202] [2021-07-13 19:51:20,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627155202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:20,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139324348] [2021-07-13 19:51:20,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:20,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:20,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:20,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:51:20,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:20,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139324348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:20,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:20,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:51:20,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641244287] [2021-07-13 19:51:20,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:51:20,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:20,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:51:20,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:51:20,526 INFO L87 Difference]: Start difference. First operand 3410 states and 7651 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:20,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:20,591 INFO L93 Difference]: Finished difference Result 4354 states and 9576 transitions. [2021-07-13 19:51:20,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:51:20,592 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:51:20,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:20,610 INFO L225 Difference]: With dead ends: 4354 [2021-07-13 19:51:20,610 INFO L226 Difference]: Without dead ends: 4335 [2021-07-13 19:51:20,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:51:20,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-07-13 19:51:20,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 3543. [2021-07-13 19:51:20,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3542 states have (on average 2.2478825522303785) internal successors, (7962), 3542 states have internal predecessors, (7962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 7962 transitions. [2021-07-13 19:51:20,705 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 7962 transitions. Word has length 31 [2021-07-13 19:51:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:20,706 INFO L482 AbstractCegarLoop]: Abstraction has 3543 states and 7962 transitions. [2021-07-13 19:51:20,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:20,706 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 7962 transitions. [2021-07-13 19:51:20,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:51:20,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:20,713 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:20,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 19:51:20,937 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:20,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:20,937 INFO L82 PathProgramCache]: Analyzing trace with hash 702036756, now seen corresponding path program 5 times [2021-07-13 19:51:20,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:20,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800928364] [2021-07-13 19:51:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:51:20,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:20,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800928364] [2021-07-13 19:51:20,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800928364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:20,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776196392] [2021-07-13 19:51:20,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:21,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:51:21,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:21,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:51:21,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:51:21,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776196392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:21,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:21,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 19:51:21,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085186476] [2021-07-13 19:51:21,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:51:21,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:21,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:51:21,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:51:21,142 INFO L87 Difference]: Start difference. First operand 3543 states and 7962 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:21,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:21,187 INFO L93 Difference]: Finished difference Result 4170 states and 9274 transitions. [2021-07-13 19:51:21,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:51:21,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:51:21,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:21,202 INFO L225 Difference]: With dead ends: 4170 [2021-07-13 19:51:21,202 INFO L226 Difference]: Without dead ends: 4151 [2021-07-13 19:51:21,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:51:21,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-07-13 19:51:21,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3929. [2021-07-13 19:51:21,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3929 states, 3928 states have (on average 2.253818737270876) internal successors, (8853), 3928 states have internal predecessors, (8853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:21,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3929 states to 3929 states and 8853 transitions. [2021-07-13 19:51:21,299 INFO L78 Accepts]: Start accepts. Automaton has 3929 states and 8853 transitions. Word has length 31 [2021-07-13 19:51:21,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:21,299 INFO L482 AbstractCegarLoop]: Abstraction has 3929 states and 8853 transitions. [2021-07-13 19:51:21,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:21,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3929 states and 8853 transitions. [2021-07-13 19:51:21,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:51:21,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:21,306 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:21,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 19:51:21,529 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:21,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:21,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1049711310, now seen corresponding path program 6 times [2021-07-13 19:51:21,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:21,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632116360] [2021-07-13 19:51:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:21,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:21,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632116360] [2021-07-13 19:51:21,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632116360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:21,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33931605] [2021-07-13 19:51:21,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:21,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:51:21,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:21,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:51:21,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:21,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33931605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:21,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:21,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:51:21,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125221093] [2021-07-13 19:51:21,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:51:21,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:21,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:51:21,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:51:21,666 INFO L87 Difference]: Start difference. First operand 3929 states and 8853 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:21,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:21,729 INFO L93 Difference]: Finished difference Result 5348 states and 11836 transitions. [2021-07-13 19:51:21,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:51:21,730 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:51:21,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:21,743 INFO L225 Difference]: With dead ends: 5348 [2021-07-13 19:51:21,743 INFO L226 Difference]: Without dead ends: 5329 [2021-07-13 19:51:21,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:51:21,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5329 states. [2021-07-13 19:51:21,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5329 to 4092. [2021-07-13 19:51:21,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4092 states, 4091 states have (on average 2.2561720850647764) internal successors, (9230), 4091 states have internal predecessors, (9230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:21,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4092 states to 4092 states and 9230 transitions. [2021-07-13 19:51:21,886 INFO L78 Accepts]: Start accepts. Automaton has 4092 states and 9230 transitions. Word has length 31 [2021-07-13 19:51:21,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:21,886 INFO L482 AbstractCegarLoop]: Abstraction has 4092 states and 9230 transitions. [2021-07-13 19:51:21,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:21,887 INFO L276 IsEmpty]: Start isEmpty. Operand 4092 states and 9230 transitions. [2021-07-13 19:51:21,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:51:21,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:21,894 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:22,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:22,117 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:22,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:22,118 INFO L82 PathProgramCache]: Analyzing trace with hash -2056604018, now seen corresponding path program 7 times [2021-07-13 19:51:22,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:22,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208591228] [2021-07-13 19:51:22,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:22,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:22,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208591228] [2021-07-13 19:51:22,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208591228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:22,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491404917] [2021-07-13 19:51:22,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:22,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:51:22,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:22,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491404917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:22,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:22,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:51:22,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396130833] [2021-07-13 19:51:22,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:51:22,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:22,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:51:22,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:51:22,273 INFO L87 Difference]: Start difference. First operand 4092 states and 9230 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:22,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:22,342 INFO L93 Difference]: Finished difference Result 5419 states and 11952 transitions. [2021-07-13 19:51:22,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:51:22,343 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:51:22,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:22,356 INFO L225 Difference]: With dead ends: 5419 [2021-07-13 19:51:22,356 INFO L226 Difference]: Without dead ends: 5400 [2021-07-13 19:51:22,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:51:22,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2021-07-13 19:51:22,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 2885. [2021-07-13 19:51:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2885 states, 2884 states have (on average 2.235090152565881) internal successors, (6446), 2884 states have internal predecessors, (6446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2885 states to 2885 states and 6446 transitions. [2021-07-13 19:51:22,432 INFO L78 Accepts]: Start accepts. Automaton has 2885 states and 6446 transitions. Word has length 31 [2021-07-13 19:51:22,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:22,432 INFO L482 AbstractCegarLoop]: Abstraction has 2885 states and 6446 transitions. [2021-07-13 19:51:22,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:22,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2885 states and 6446 transitions. [2021-07-13 19:51:22,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:51:22,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:22,438 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:22,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:22,653 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:22,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:22,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1347381606, now seen corresponding path program 8 times [2021-07-13 19:51:22,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:22,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991946115] [2021-07-13 19:51:22,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:22,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:22,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991946115] [2021-07-13 19:51:22,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991946115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:22,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655324421] [2021-07-13 19:51:22,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:51:22,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:22,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:22,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:51:22,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:22,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655324421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:22,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:22,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:51:22,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348365276] [2021-07-13 19:51:22,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:51:22,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:22,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:51:22,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:51:22,817 INFO L87 Difference]: Start difference. First operand 2885 states and 6446 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:22,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:22,954 INFO L93 Difference]: Finished difference Result 5635 states and 12327 transitions. [2021-07-13 19:51:22,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:51:22,954 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:51:22,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:22,966 INFO L225 Difference]: With dead ends: 5635 [2021-07-13 19:51:22,967 INFO L226 Difference]: Without dead ends: 5635 [2021-07-13 19:51:22,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:51:22,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5635 states. [2021-07-13 19:51:23,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5635 to 3879. [2021-07-13 19:51:23,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3879 states, 3878 states have (on average 2.2439401753481176) internal successors, (8702), 3878 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:23,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3879 states to 3879 states and 8702 transitions. [2021-07-13 19:51:23,053 INFO L78 Accepts]: Start accepts. Automaton has 3879 states and 8702 transitions. Word has length 36 [2021-07-13 19:51:23,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:23,053 INFO L482 AbstractCegarLoop]: Abstraction has 3879 states and 8702 transitions. [2021-07-13 19:51:23,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:23,053 INFO L276 IsEmpty]: Start isEmpty. Operand 3879 states and 8702 transitions. [2021-07-13 19:51:23,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:51:23,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:23,060 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:23,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 19:51:23,273 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:23,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:23,273 INFO L82 PathProgramCache]: Analyzing trace with hash -813812389, now seen corresponding path program 9 times [2021-07-13 19:51:23,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:23,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806401957] [2021-07-13 19:51:23,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:23,312 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:23,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:23,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806401957] [2021-07-13 19:51:23,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806401957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:23,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444857237] [2021-07-13 19:51:23,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:23,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:51:23,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:23,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:51:23,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:23,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444857237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:23,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:23,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:51:23,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033989420] [2021-07-13 19:51:23,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:51:23,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:23,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:51:23,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:51:23,432 INFO L87 Difference]: Start difference. First operand 3879 states and 8702 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:23,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:23,546 INFO L93 Difference]: Finished difference Result 7170 states and 15945 transitions. [2021-07-13 19:51:23,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:23,546 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:51:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:23,564 INFO L225 Difference]: With dead ends: 7170 [2021-07-13 19:51:23,564 INFO L226 Difference]: Without dead ends: 7072 [2021-07-13 19:51:23,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:51:23,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7072 states. [2021-07-13 19:51:23,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7072 to 6656. [2021-07-13 19:51:23,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6656 states, 6655 states have (on average 2.251089406461307) internal successors, (14981), 6655 states have internal predecessors, (14981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:23,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6656 states to 6656 states and 14981 transitions. [2021-07-13 19:51:23,725 INFO L78 Accepts]: Start accepts. Automaton has 6656 states and 14981 transitions. Word has length 36 [2021-07-13 19:51:23,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:23,726 INFO L482 AbstractCegarLoop]: Abstraction has 6656 states and 14981 transitions. [2021-07-13 19:51:23,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:23,726 INFO L276 IsEmpty]: Start isEmpty. Operand 6656 states and 14981 transitions. [2021-07-13 19:51:23,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:51:23,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:23,735 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:23,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:23,949 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:23,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:23,949 INFO L82 PathProgramCache]: Analyzing trace with hash -16954001, now seen corresponding path program 10 times [2021-07-13 19:51:23,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:23,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084601215] [2021-07-13 19:51:23,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:23,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:23,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084601215] [2021-07-13 19:51:23,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084601215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:23,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924236581] [2021-07-13 19:51:23,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:24,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:24,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:24,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:51:24,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:24,102 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:24,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924236581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:24,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:24,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:51:24,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833289701] [2021-07-13 19:51:24,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:51:24,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:24,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:51:24,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:51:24,103 INFO L87 Difference]: Start difference. First operand 6656 states and 14981 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:24,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:24,182 INFO L93 Difference]: Finished difference Result 6984 states and 15407 transitions. [2021-07-13 19:51:24,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:51:24,183 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:51:24,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:24,199 INFO L225 Difference]: With dead ends: 6984 [2021-07-13 19:51:24,199 INFO L226 Difference]: Without dead ends: 6984 [2021-07-13 19:51:24,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:51:24,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6984 states. [2021-07-13 19:51:24,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6984 to 6596. [2021-07-13 19:51:24,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6596 states, 6595 states have (on average 2.234571645185747) internal successors, (14737), 6595 states have internal predecessors, (14737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:24,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 14737 transitions. [2021-07-13 19:51:24,361 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 14737 transitions. Word has length 36 [2021-07-13 19:51:24,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:24,362 INFO L482 AbstractCegarLoop]: Abstraction has 6596 states and 14737 transitions. [2021-07-13 19:51:24,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:24,362 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 14737 transitions. [2021-07-13 19:51:24,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:51:24,371 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:24,371 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:24,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 19:51:24,585 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:24,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:24,585 INFO L82 PathProgramCache]: Analyzing trace with hash -780141082, now seen corresponding path program 11 times [2021-07-13 19:51:24,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:24,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496402871] [2021-07-13 19:51:24,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:24,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:24,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496402871] [2021-07-13 19:51:24,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496402871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:24,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963341320] [2021-07-13 19:51:24,622 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:24,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:51:24,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:24,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:51:24,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:24,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963341320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:24,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:24,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:51:24,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126243362] [2021-07-13 19:51:24,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:51:24,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:24,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:51:24,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:51:24,733 INFO L87 Difference]: Start difference. First operand 6596 states and 14737 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:24,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:24,831 INFO L93 Difference]: Finished difference Result 7018 states and 15447 transitions. [2021-07-13 19:51:24,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:51:24,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:51:24,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:24,844 INFO L225 Difference]: With dead ends: 7018 [2021-07-13 19:51:24,844 INFO L226 Difference]: Without dead ends: 7014 [2021-07-13 19:51:24,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:51:24,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7014 states. [2021-07-13 19:51:24,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7014 to 6152. [2021-07-13 19:51:24,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6152 states, 6151 states have (on average 2.238497805234921) internal successors, (13769), 6151 states have internal predecessors, (13769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:24,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6152 states to 6152 states and 13769 transitions. [2021-07-13 19:51:24,975 INFO L78 Accepts]: Start accepts. Automaton has 6152 states and 13769 transitions. Word has length 36 [2021-07-13 19:51:24,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:24,975 INFO L482 AbstractCegarLoop]: Abstraction has 6152 states and 13769 transitions. [2021-07-13 19:51:24,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:24,975 INFO L276 IsEmpty]: Start isEmpty. Operand 6152 states and 13769 transitions. [2021-07-13 19:51:24,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:51:24,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:24,984 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:25,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 19:51:25,197 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:25,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:25,197 INFO L82 PathProgramCache]: Analyzing trace with hash 337483942, now seen corresponding path program 12 times [2021-07-13 19:51:25,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:25,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971225484] [2021-07-13 19:51:25,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:25,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:25,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971225484] [2021-07-13 19:51:25,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971225484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:25,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675582022] [2021-07-13 19:51:25,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:51:25,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:51:25,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:25,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:51:25,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:25,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675582022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:25,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:25,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:51:25,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074546357] [2021-07-13 19:51:25,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:51:25,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:25,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:51:25,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:51:25,365 INFO L87 Difference]: Start difference. First operand 6152 states and 13769 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:25,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:25,457 INFO L93 Difference]: Finished difference Result 9612 states and 21128 transitions. [2021-07-13 19:51:25,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:51:25,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:51:25,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:25,473 INFO L225 Difference]: With dead ends: 9612 [2021-07-13 19:51:25,473 INFO L226 Difference]: Without dead ends: 9612 [2021-07-13 19:51:25,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:51:25,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9612 states. [2021-07-13 19:51:25,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9612 to 8560. [2021-07-13 19:51:25,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8560 states, 8559 states have (on average 2.2475756513611405) internal successors, (19237), 8559 states have internal predecessors, (19237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:25,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8560 states to 8560 states and 19237 transitions. [2021-07-13 19:51:25,631 INFO L78 Accepts]: Start accepts. Automaton has 8560 states and 19237 transitions. Word has length 36 [2021-07-13 19:51:25,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:25,632 INFO L482 AbstractCegarLoop]: Abstraction has 8560 states and 19237 transitions. [2021-07-13 19:51:25,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:25,632 INFO L276 IsEmpty]: Start isEmpty. Operand 8560 states and 19237 transitions. [2021-07-13 19:51:25,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:51:25,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:25,642 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:25,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 19:51:25,868 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:25,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:25,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1332438811, now seen corresponding path program 13 times [2021-07-13 19:51:25,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:25,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312929551] [2021-07-13 19:51:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:25,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:25,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312929551] [2021-07-13 19:51:25,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312929551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:25,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327214511] [2021-07-13 19:51:25,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:25,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:51:25,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:26,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327214511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:26,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:26,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:51:26,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599669881] [2021-07-13 19:51:26,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:51:26,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:26,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:51:26,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:51:26,006 INFO L87 Difference]: Start difference. First operand 8560 states and 19237 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:26,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:26,146 INFO L93 Difference]: Finished difference Result 10199 states and 22770 transitions. [2021-07-13 19:51:26,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:51:26,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:51:26,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:26,163 INFO L225 Difference]: With dead ends: 10199 [2021-07-13 19:51:26,163 INFO L226 Difference]: Without dead ends: 10193 [2021-07-13 19:51:26,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:51:26,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10193 states. [2021-07-13 19:51:26,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10193 to 9772. [2021-07-13 19:51:26,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9772 states, 9771 states have (on average 2.2569849554805037) internal successors, (22053), 9771 states have internal predecessors, (22053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:26,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9772 states to 9772 states and 22053 transitions. [2021-07-13 19:51:26,347 INFO L78 Accepts]: Start accepts. Automaton has 9772 states and 22053 transitions. Word has length 36 [2021-07-13 19:51:26,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:26,347 INFO L482 AbstractCegarLoop]: Abstraction has 9772 states and 22053 transitions. [2021-07-13 19:51:26,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:26,347 INFO L276 IsEmpty]: Start isEmpty. Operand 9772 states and 22053 transitions. [2021-07-13 19:51:26,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:51:26,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:26,357 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:26,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 19:51:26,581 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:26,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:26,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1688140945, now seen corresponding path program 14 times [2021-07-13 19:51:26,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:26,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538104621] [2021-07-13 19:51:26,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:26,609 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:26,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:26,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538104621] [2021-07-13 19:51:26,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538104621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:26,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476849704] [2021-07-13 19:51:26,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:26,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:26,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:26,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:51:26,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:26,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476849704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:26,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:26,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:51:26,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790923892] [2021-07-13 19:51:26,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:51:26,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:26,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:51:26,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:51:26,709 INFO L87 Difference]: Start difference. First operand 9772 states and 22053 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:26,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:26,827 INFO L93 Difference]: Finished difference Result 10439 states and 23230 transitions. [2021-07-13 19:51:26,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:51:26,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:51:26,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:26,841 INFO L225 Difference]: With dead ends: 10439 [2021-07-13 19:51:26,841 INFO L226 Difference]: Without dead ends: 10437 [2021-07-13 19:51:26,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:51:26,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10437 states. [2021-07-13 19:51:26,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10437 to 9840. [2021-07-13 19:51:26,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9840 states, 9839 states have (on average 2.252363045024901) internal successors, (22161), 9839 states have internal predecessors, (22161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:26,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9840 states to 9840 states and 22161 transitions. [2021-07-13 19:51:26,993 INFO L78 Accepts]: Start accepts. Automaton has 9840 states and 22161 transitions. Word has length 36 [2021-07-13 19:51:26,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:26,994 INFO L482 AbstractCegarLoop]: Abstraction has 9840 states and 22161 transitions. [2021-07-13 19:51:26,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:26,994 INFO L276 IsEmpty]: Start isEmpty. Operand 9840 states and 22161 transitions. [2021-07-13 19:51:27,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:51:27,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:27,004 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:27,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 19:51:27,219 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:27,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:27,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1843639270, now seen corresponding path program 15 times [2021-07-13 19:51:27,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:27,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091870997] [2021-07-13 19:51:27,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:27,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:27,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091870997] [2021-07-13 19:51:27,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091870997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:27,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104306378] [2021-07-13 19:51:27,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:27,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:51:27,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:27,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:51:27,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:51:27,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104306378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:27,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:27,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-07-13 19:51:27,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137030978] [2021-07-13 19:51:27,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:51:27,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:27,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:51:27,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:51:27,358 INFO L87 Difference]: Start difference. First operand 9840 states and 22161 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 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) [2021-07-13 19:51:27,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:27,819 INFO L93 Difference]: Finished difference Result 16933 states and 36602 transitions. [2021-07-13 19:51:27,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:51:27,819 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 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 36 [2021-07-13 19:51:27,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:27,844 INFO L225 Difference]: With dead ends: 16933 [2021-07-13 19:51:27,845 INFO L226 Difference]: Without dead ends: 16887 [2021-07-13 19:51:27,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 257.3ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:51:27,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16887 states. [2021-07-13 19:51:28,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16887 to 11694. [2021-07-13 19:51:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11694 states, 11693 states have (on average 2.213033438809544) internal successors, (25877), 11693 states have internal predecessors, (25877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:28,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11694 states to 11694 states and 25877 transitions. [2021-07-13 19:51:28,082 INFO L78 Accepts]: Start accepts. Automaton has 11694 states and 25877 transitions. Word has length 36 [2021-07-13 19:51:28,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:28,082 INFO L482 AbstractCegarLoop]: Abstraction has 11694 states and 25877 transitions. [2021-07-13 19:51:28,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 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) [2021-07-13 19:51:28,082 INFO L276 IsEmpty]: Start isEmpty. Operand 11694 states and 25877 transitions. [2021-07-13 19:51:28,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:51:28,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:28,090 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:28,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:28,290 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:28,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:28,291 INFO L82 PathProgramCache]: Analyzing trace with hash 2027368357, now seen corresponding path program 16 times [2021-07-13 19:51:28,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:28,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875720876] [2021-07-13 19:51:28,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:28,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:28,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875720876] [2021-07-13 19:51:28,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875720876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:28,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318291735] [2021-07-13 19:51:28,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:28,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:28,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:28,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:51:28,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:28,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318291735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:28,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:28,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 19:51:28,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814008967] [2021-07-13 19:51:28,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:51:28,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:28,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:51:28,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:51:28,468 INFO L87 Difference]: Start difference. First operand 11694 states and 25877 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:28,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:28,585 INFO L93 Difference]: Finished difference Result 12577 states and 27332 transitions. [2021-07-13 19:51:28,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:51:28,585 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:51:28,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:28,607 INFO L225 Difference]: With dead ends: 12577 [2021-07-13 19:51:28,607 INFO L226 Difference]: Without dead ends: 12575 [2021-07-13 19:51:28,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:51:28,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12575 states. [2021-07-13 19:51:28,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12575 to 11238. [2021-07-13 19:51:28,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11238 states, 11237 states have (on average 2.20352407226128) internal successors, (24761), 11237 states have internal predecessors, (24761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:28,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11238 states to 11238 states and 24761 transitions. [2021-07-13 19:51:28,805 INFO L78 Accepts]: Start accepts. Automaton has 11238 states and 24761 transitions. Word has length 36 [2021-07-13 19:51:28,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:28,806 INFO L482 AbstractCegarLoop]: Abstraction has 11238 states and 24761 transitions. [2021-07-13 19:51:28,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:28,806 INFO L276 IsEmpty]: Start isEmpty. Operand 11238 states and 24761 transitions. [2021-07-13 19:51:28,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:51:28,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:28,815 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:29,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 19:51:29,029 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:29,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:29,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1853631623, now seen corresponding path program 17 times [2021-07-13 19:51:29,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:29,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516925395] [2021-07-13 19:51:29,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:51:29,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:29,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516925395] [2021-07-13 19:51:29,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516925395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:29,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836460961] [2021-07-13 19:51:29,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:29,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:51:29,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:29,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:51:29,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:51:29,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836460961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:29,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:29,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 19:51:29,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345250772] [2021-07-13 19:51:29,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:51:29,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:29,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:51:29,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:51:29,149 INFO L87 Difference]: Start difference. First operand 11238 states and 24761 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:29,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:29,303 INFO L93 Difference]: Finished difference Result 11745 states and 25558 transitions. [2021-07-13 19:51:29,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:51:29,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:51:29,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:29,316 INFO L225 Difference]: With dead ends: 11745 [2021-07-13 19:51:29,316 INFO L226 Difference]: Without dead ends: 11709 [2021-07-13 19:51:29,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:51:29,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11709 states. [2021-07-13 19:51:29,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11709 to 11232. [2021-07-13 19:51:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11232 states, 11231 states have (on average 2.19740005342356) internal successors, (24679), 11231 states have internal predecessors, (24679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:29,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11232 states to 11232 states and 24679 transitions. [2021-07-13 19:51:29,461 INFO L78 Accepts]: Start accepts. Automaton has 11232 states and 24679 transitions. Word has length 36 [2021-07-13 19:51:29,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:29,461 INFO L482 AbstractCegarLoop]: Abstraction has 11232 states and 24679 transitions. [2021-07-13 19:51:29,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:29,461 INFO L276 IsEmpty]: Start isEmpty. Operand 11232 states and 24679 transitions. [2021-07-13 19:51:29,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:51:29,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:29,467 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:29,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:29,675 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:29,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:29,676 INFO L82 PathProgramCache]: Analyzing trace with hash -730012133, now seen corresponding path program 18 times [2021-07-13 19:51:29,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:29,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790653051] [2021-07-13 19:51:29,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:29,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:29,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790653051] [2021-07-13 19:51:29,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790653051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:29,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369164378] [2021-07-13 19:51:29,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:29,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:51:29,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:29,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:51:29,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:29,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369164378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:29,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:29,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:51:29,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595833555] [2021-07-13 19:51:29,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:51:29,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:29,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:51:29,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:51:29,819 INFO L87 Difference]: Start difference. First operand 11232 states and 24679 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:29,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:29,929 INFO L93 Difference]: Finished difference Result 13428 states and 29318 transitions. [2021-07-13 19:51:29,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:51:29,929 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:51:29,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:29,952 INFO L225 Difference]: With dead ends: 13428 [2021-07-13 19:51:29,952 INFO L226 Difference]: Without dead ends: 13422 [2021-07-13 19:51:29,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:51:29,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13422 states. [2021-07-13 19:51:30,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13422 to 12944. [2021-07-13 19:51:30,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12944 states, 12943 states have (on average 2.2074480414123463) internal successors, (28571), 12943 states have internal predecessors, (28571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:30,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12944 states to 12944 states and 28571 transitions. [2021-07-13 19:51:30,235 INFO L78 Accepts]: Start accepts. Automaton has 12944 states and 28571 transitions. Word has length 36 [2021-07-13 19:51:30,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:30,235 INFO L482 AbstractCegarLoop]: Abstraction has 12944 states and 28571 transitions. [2021-07-13 19:51:30,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:30,236 INFO L276 IsEmpty]: Start isEmpty. Operand 12944 states and 28571 transitions. [2021-07-13 19:51:30,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:51:30,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:30,242 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:30,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 19:51:30,449 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:30,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:30,449 INFO L82 PathProgramCache]: Analyzing trace with hash 544375407, now seen corresponding path program 19 times [2021-07-13 19:51:30,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:30,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998666300] [2021-07-13 19:51:30,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:30,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:30,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998666300] [2021-07-13 19:51:30,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998666300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:30,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682448888] [2021-07-13 19:51:30,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:30,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:51:30,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:30,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682448888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:30,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:30,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:51:30,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646933924] [2021-07-13 19:51:30,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:51:30,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:30,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:51:30,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:51:30,575 INFO L87 Difference]: Start difference. First operand 12944 states and 28571 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:30,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:30,684 INFO L93 Difference]: Finished difference Result 13864 states and 30236 transitions. [2021-07-13 19:51:30,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:51:30,684 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:51:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:30,711 INFO L225 Difference]: With dead ends: 13864 [2021-07-13 19:51:30,711 INFO L226 Difference]: Without dead ends: 13864 [2021-07-13 19:51:30,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:51:30,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13864 states. [2021-07-13 19:51:30,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13864 to 12976. [2021-07-13 19:51:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12976 states, 12975 states have (on average 2.206936416184971) internal successors, (28635), 12975 states have internal predecessors, (28635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:31,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12976 states to 12976 states and 28635 transitions. [2021-07-13 19:51:31,025 INFO L78 Accepts]: Start accepts. Automaton has 12976 states and 28635 transitions. Word has length 36 [2021-07-13 19:51:31,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:31,025 INFO L482 AbstractCegarLoop]: Abstraction has 12976 states and 28635 transitions. [2021-07-13 19:51:31,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:31,025 INFO L276 IsEmpty]: Start isEmpty. Operand 12976 states and 28635 transitions. [2021-07-13 19:51:31,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:51:31,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:31,032 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:31,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:31,233 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:31,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:31,233 INFO L82 PathProgramCache]: Analyzing trace with hash -35082587, now seen corresponding path program 20 times [2021-07-13 19:51:31,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:31,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893239582] [2021-07-13 19:51:31,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:31,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:31,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893239582] [2021-07-13 19:51:31,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893239582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:31,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222770411] [2021-07-13 19:51:31,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:31,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:31,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:31,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:51:31,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:31,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222770411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:31,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:31,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 19:51:31,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722324588] [2021-07-13 19:51:31,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:51:31,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:31,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:51:31,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:51:31,380 INFO L87 Difference]: Start difference. First operand 12976 states and 28635 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:31,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:31,501 INFO L93 Difference]: Finished difference Result 14564 states and 31706 transitions. [2021-07-13 19:51:31,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:51:31,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:51:31,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:31,522 INFO L225 Difference]: With dead ends: 14564 [2021-07-13 19:51:31,522 INFO L226 Difference]: Without dead ends: 14564 [2021-07-13 19:51:31,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:51:31,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14564 states. [2021-07-13 19:51:31,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14564 to 13136. [2021-07-13 19:51:31,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13136 states, 13135 states have (on average 2.204415683288923) internal successors, (28955), 13135 states have internal predecessors, (28955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:31,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13136 states to 13136 states and 28955 transitions. [2021-07-13 19:51:31,732 INFO L78 Accepts]: Start accepts. Automaton has 13136 states and 28955 transitions. Word has length 36 [2021-07-13 19:51:31,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:31,732 INFO L482 AbstractCegarLoop]: Abstraction has 13136 states and 28955 transitions. [2021-07-13 19:51:31,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:31,732 INFO L276 IsEmpty]: Start isEmpty. Operand 13136 states and 28955 transitions. [2021-07-13 19:51:31,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:51:31,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:31,738 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:31,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 19:51:31,939 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:31,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:31,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1417782343, now seen corresponding path program 21 times [2021-07-13 19:51:31,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:31,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143764824] [2021-07-13 19:51:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:31,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:31,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143764824] [2021-07-13 19:51:31,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143764824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:31,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028816967] [2021-07-13 19:51:31,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:32,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:51:32,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:32,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:51:32,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:32,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028816967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:32,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:32,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:51:32,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365637090] [2021-07-13 19:51:32,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:51:32,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:32,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:51:32,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:51:32,139 INFO L87 Difference]: Start difference. First operand 13136 states and 28955 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:32,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:32,274 INFO L93 Difference]: Finished difference Result 14130 states and 30823 transitions. [2021-07-13 19:51:32,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:51:32,274 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:51:32,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:32,294 INFO L225 Difference]: With dead ends: 14130 [2021-07-13 19:51:32,294 INFO L226 Difference]: Without dead ends: 14130 [2021-07-13 19:51:32,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:51:32,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14130 states. [2021-07-13 19:51:32,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14130 to 12516. [2021-07-13 19:51:32,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12516 states, 12515 states have (on average 2.204314822213344) internal successors, (27587), 12515 states have internal predecessors, (27587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:32,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12516 states to 12516 states and 27587 transitions. [2021-07-13 19:51:32,483 INFO L78 Accepts]: Start accepts. Automaton has 12516 states and 27587 transitions. Word has length 36 [2021-07-13 19:51:32,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:32,483 INFO L482 AbstractCegarLoop]: Abstraction has 12516 states and 27587 transitions. [2021-07-13 19:51:32,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:32,483 INFO L276 IsEmpty]: Start isEmpty. Operand 12516 states and 27587 transitions. [2021-07-13 19:51:32,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 19:51:32,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:32,494 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:32,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:32,697 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:32,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:32,697 INFO L82 PathProgramCache]: Analyzing trace with hash 46076731, now seen corresponding path program 22 times [2021-07-13 19:51:32,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:32,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877666679] [2021-07-13 19:51:32,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:32,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:32,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877666679] [2021-07-13 19:51:32,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877666679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:32,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682031535] [2021-07-13 19:51:32,746 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 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 [2021-07-13 19:51:32,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:32,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:32,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:51:32,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:32,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682031535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:32,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:32,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:51:32,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703430387] [2021-07-13 19:51:32,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:51:32,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:32,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:51:32,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:51:32,856 INFO L87 Difference]: Start difference. First operand 12516 states and 27587 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:33,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:33,060 INFO L93 Difference]: Finished difference Result 15926 states and 34731 transitions. [2021-07-13 19:51:33,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:33,060 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-13 19:51:33,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:33,181 INFO L225 Difference]: With dead ends: 15926 [2021-07-13 19:51:33,181 INFO L226 Difference]: Without dead ends: 15926 [2021-07-13 19:51:33,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:51:33,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15926 states. [2021-07-13 19:51:33,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15926 to 13120. [2021-07-13 19:51:33,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13120 states, 13119 states have (on average 2.2095434103209084) internal successors, (28987), 13119 states have internal predecessors, (28987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:33,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13120 states to 13120 states and 28987 transitions. [2021-07-13 19:51:33,435 INFO L78 Accepts]: Start accepts. Automaton has 13120 states and 28987 transitions. Word has length 46 [2021-07-13 19:51:33,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:33,435 INFO L482 AbstractCegarLoop]: Abstraction has 13120 states and 28987 transitions. [2021-07-13 19:51:33,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:33,436 INFO L276 IsEmpty]: Start isEmpty. Operand 13120 states and 28987 transitions. [2021-07-13 19:51:33,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 19:51:33,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:33,450 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:33,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 19:51:33,659 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:33,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:33,659 INFO L82 PathProgramCache]: Analyzing trace with hash 973293501, now seen corresponding path program 23 times [2021-07-13 19:51:33,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:33,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687530819] [2021-07-13 19:51:33,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:33,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:33,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687530819] [2021-07-13 19:51:33,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687530819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:33,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228806693] [2021-07-13 19:51:33,694 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 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 [2021-07-13 19:51:33,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:51:33,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:33,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:51:33,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:33,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228806693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:33,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:33,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 19:51:33,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347312706] [2021-07-13 19:51:33,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:51:33,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:33,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:51:33,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:51:33,803 INFO L87 Difference]: Start difference. First operand 13120 states and 28987 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:33,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:33,926 INFO L93 Difference]: Finished difference Result 13630 states and 29839 transitions. [2021-07-13 19:51:33,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:33,927 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-13 19:51:33,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:33,952 INFO L225 Difference]: With dead ends: 13630 [2021-07-13 19:51:33,952 INFO L226 Difference]: Without dead ends: 13622 [2021-07-13 19:51:33,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:51:33,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13622 states. [2021-07-13 19:51:34,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13622 to 13056. [2021-07-13 19:51:34,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13056 states, 13055 states have (on average 2.2050555342780545) internal successors, (28787), 13055 states have internal predecessors, (28787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13056 states to 13056 states and 28787 transitions. [2021-07-13 19:51:34,175 INFO L78 Accepts]: Start accepts. Automaton has 13056 states and 28787 transitions. Word has length 46 [2021-07-13 19:51:34,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:34,175 INFO L482 AbstractCegarLoop]: Abstraction has 13056 states and 28787 transitions. [2021-07-13 19:51:34,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:34,176 INFO L276 IsEmpty]: Start isEmpty. Operand 13056 states and 28787 transitions. [2021-07-13 19:51:34,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 19:51:34,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:34,191 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:34,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:34,413 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:34,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:34,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2017295833, now seen corresponding path program 24 times [2021-07-13 19:51:34,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:34,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611878699] [2021-07-13 19:51:34,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:34,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:34,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611878699] [2021-07-13 19:51:34,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611878699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:34,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831976513] [2021-07-13 19:51:34,455 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 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 [2021-07-13 19:51:34,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:51:34,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:34,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:51:34,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:34,575 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:34,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831976513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:34,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:34,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 19:51:34,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420741314] [2021-07-13 19:51:34,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:51:34,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:34,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:51:34,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:51:34,578 INFO L87 Difference]: Start difference. First operand 13056 states and 28787 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:34,729 INFO L93 Difference]: Finished difference Result 17393 states and 37929 transitions. [2021-07-13 19:51:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:34,730 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-13 19:51:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:34,765 INFO L225 Difference]: With dead ends: 17393 [2021-07-13 19:51:34,765 INFO L226 Difference]: Without dead ends: 17393 [2021-07-13 19:51:34,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:51:34,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17393 states. [2021-07-13 19:51:35,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17393 to 15686. [2021-07-13 19:51:35,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15686 states, 15685 states have (on average 2.224099458080969) internal successors, (34885), 15685 states have internal predecessors, (34885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:35,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15686 states to 15686 states and 34885 transitions. [2021-07-13 19:51:35,062 INFO L78 Accepts]: Start accepts. Automaton has 15686 states and 34885 transitions. Word has length 46 [2021-07-13 19:51:35,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:35,062 INFO L482 AbstractCegarLoop]: Abstraction has 15686 states and 34885 transitions. [2021-07-13 19:51:35,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:35,062 INFO L276 IsEmpty]: Start isEmpty. Operand 15686 states and 34885 transitions. [2021-07-13 19:51:35,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 19:51:35,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:35,133 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:35,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 19:51:35,333 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:35,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:35,333 INFO L82 PathProgramCache]: Analyzing trace with hash -847239833, now seen corresponding path program 25 times [2021-07-13 19:51:35,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:35,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467823263] [2021-07-13 19:51:35,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:35,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:35,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467823263] [2021-07-13 19:51:35,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467823263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:35,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257597290] [2021-07-13 19:51:35,364 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 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 [2021-07-13 19:51:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:35,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:51:35,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:35,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257597290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:35,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:35,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 19:51:35,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619530169] [2021-07-13 19:51:35,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:51:35,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:35,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:51:35,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:51:35,486 INFO L87 Difference]: Start difference. First operand 15686 states and 34885 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:35,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:35,635 INFO L93 Difference]: Finished difference Result 16911 states and 36914 transitions. [2021-07-13 19:51:35,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:35,635 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-13 19:51:35,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:35,668 INFO L225 Difference]: With dead ends: 16911 [2021-07-13 19:51:35,668 INFO L226 Difference]: Without dead ends: 16863 [2021-07-13 19:51:35,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:51:35,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16863 states. [2021-07-13 19:51:35,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16863 to 14310. [2021-07-13 19:51:35,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14310 states, 14309 states have (on average 2.212104270039835) internal successors, (31653), 14309 states have internal predecessors, (31653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:35,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14310 states to 14310 states and 31653 transitions. [2021-07-13 19:51:35,965 INFO L78 Accepts]: Start accepts. Automaton has 14310 states and 31653 transitions. Word has length 46 [2021-07-13 19:51:35,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:35,966 INFO L482 AbstractCegarLoop]: Abstraction has 14310 states and 31653 transitions. [2021-07-13 19:51:35,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:35,966 INFO L276 IsEmpty]: Start isEmpty. Operand 14310 states and 31653 transitions. [2021-07-13 19:51:35,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 19:51:35,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:35,980 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:36,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 19:51:36,181 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:36,181 INFO L82 PathProgramCache]: Analyzing trace with hash 910987597, now seen corresponding path program 26 times [2021-07-13 19:51:36,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:36,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481526639] [2021-07-13 19:51:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:36,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:36,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481526639] [2021-07-13 19:51:36,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481526639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:36,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444481011] [2021-07-13 19:51:36,214 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 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 [2021-07-13 19:51:36,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:36,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:36,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:51:36,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:36,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444481011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:36,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:36,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:51:36,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891885522] [2021-07-13 19:51:36,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:51:36,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:36,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:51:36,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:51:36,327 INFO L87 Difference]: Start difference. First operand 14310 states and 31653 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:36,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:36,456 INFO L93 Difference]: Finished difference Result 15209 states and 33173 transitions. [2021-07-13 19:51:36,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:51:36,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-13 19:51:36,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:36,477 INFO L225 Difference]: With dead ends: 15209 [2021-07-13 19:51:36,477 INFO L226 Difference]: Without dead ends: 15137 [2021-07-13 19:51:36,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:51:36,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15137 states. [2021-07-13 19:51:36,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15137 to 14314. [2021-07-13 19:51:36,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14314 states, 14313 states have (on average 2.2051980716830855) internal successors, (31563), 14313 states have internal predecessors, (31563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:36,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14314 states to 14314 states and 31563 transitions. [2021-07-13 19:51:36,753 INFO L78 Accepts]: Start accepts. Automaton has 14314 states and 31563 transitions. Word has length 46 [2021-07-13 19:51:36,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:36,753 INFO L482 AbstractCegarLoop]: Abstraction has 14314 states and 31563 transitions. [2021-07-13 19:51:36,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:36,754 INFO L276 IsEmpty]: Start isEmpty. Operand 14314 states and 31563 transitions. [2021-07-13 19:51:36,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 19:51:36,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:36,769 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:36,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 19:51:36,981 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:36,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:36,981 INFO L82 PathProgramCache]: Analyzing trace with hash -960627461, now seen corresponding path program 27 times [2021-07-13 19:51:36,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:36,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624606493] [2021-07-13 19:51:36,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 19:51:37,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:37,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624606493] [2021-07-13 19:51:37,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624606493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:37,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101617813] [2021-07-13 19:51:37,019 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 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 [2021-07-13 19:51:37,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:51:37,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:37,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:51:37,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 19:51:37,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101617813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:37,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:37,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 19:51:37,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176453465] [2021-07-13 19:51:37,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:51:37,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:37,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:51:37,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:51:37,125 INFO L87 Difference]: Start difference. First operand 14314 states and 31563 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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) [2021-07-13 19:51:37,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:37,317 INFO L93 Difference]: Finished difference Result 18333 states and 40131 transitions. [2021-07-13 19:51:37,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:51:37,318 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 46 [2021-07-13 19:51:37,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:37,340 INFO L225 Difference]: With dead ends: 18333 [2021-07-13 19:51:37,341 INFO L226 Difference]: Without dead ends: 18330 [2021-07-13 19:51:37,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:51:37,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18330 states. [2021-07-13 19:51:37,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18330 to 15498. [2021-07-13 19:51:37,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15498 states, 15497 states have (on average 2.2112021681615794) internal successors, (34267), 15497 states have internal predecessors, (34267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:37,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15498 states to 15498 states and 34267 transitions. [2021-07-13 19:51:37,546 INFO L78 Accepts]: Start accepts. Automaton has 15498 states and 34267 transitions. Word has length 46 [2021-07-13 19:51:37,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:37,547 INFO L482 AbstractCegarLoop]: Abstraction has 15498 states and 34267 transitions. [2021-07-13 19:51:37,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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) [2021-07-13 19:51:37,547 INFO L276 IsEmpty]: Start isEmpty. Operand 15498 states and 34267 transitions. [2021-07-13 19:51:37,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 19:51:37,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:37,559 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:37,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 19:51:37,760 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:37,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:37,760 INFO L82 PathProgramCache]: Analyzing trace with hash -674304251, now seen corresponding path program 28 times [2021-07-13 19:51:37,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:37,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261753092] [2021-07-13 19:51:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:37,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:37,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261753092] [2021-07-13 19:51:37,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261753092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:37,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057856130] [2021-07-13 19:51:37,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:51:37,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:37,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:37,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:51:37,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:37,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057856130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:37,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:37,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 19:51:37,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849462936] [2021-07-13 19:51:37,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:51:37,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:37,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:51:37,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:51:37,900 INFO L87 Difference]: Start difference. First operand 15498 states and 34267 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:38,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:38,084 INFO L93 Difference]: Finished difference Result 20808 states and 45501 transitions. [2021-07-13 19:51:38,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:38,085 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-13 19:51:38,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:38,116 INFO L225 Difference]: With dead ends: 20808 [2021-07-13 19:51:38,116 INFO L226 Difference]: Without dead ends: 20808 [2021-07-13 19:51:38,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:51:38,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20808 states. [2021-07-13 19:51:38,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20808 to 19050. [2021-07-13 19:51:38,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19050 states, 19049 states have (on average 2.2252611685652792) internal successors, (42389), 19049 states have internal predecessors, (42389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:38,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19050 states to 19050 states and 42389 transitions. [2021-07-13 19:51:38,370 INFO L78 Accepts]: Start accepts. Automaton has 19050 states and 42389 transitions. Word has length 46 [2021-07-13 19:51:38,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:38,370 INFO L482 AbstractCegarLoop]: Abstraction has 19050 states and 42389 transitions. [2021-07-13 19:51:38,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:38,370 INFO L276 IsEmpty]: Start isEmpty. Operand 19050 states and 42389 transitions. [2021-07-13 19:51:38,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 19:51:38,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:38,467 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:38,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:38,668 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:38,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:38,668 INFO L82 PathProgramCache]: Analyzing trace with hash 495751749, now seen corresponding path program 29 times [2021-07-13 19:51:38,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:38,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669138564] [2021-07-13 19:51:38,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:38,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:38,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669138564] [2021-07-13 19:51:38,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669138564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:38,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882558864] [2021-07-13 19:51:38,698 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 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 [2021-07-13 19:51:38,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:51:38,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:38,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:51:38,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:38,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882558864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:38,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:38,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 19:51:38,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357377918] [2021-07-13 19:51:38,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:51:38,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:38,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:51:38,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:51:38,809 INFO L87 Difference]: Start difference. First operand 19050 states and 42389 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:38,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:38,954 INFO L93 Difference]: Finished difference Result 20381 states and 44592 transitions. [2021-07-13 19:51:38,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:38,955 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-13 19:51:38,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:38,995 INFO L225 Difference]: With dead ends: 20381 [2021-07-13 19:51:38,995 INFO L226 Difference]: Without dead ends: 20349 [2021-07-13 19:51:38,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:51:39,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20349 states. [2021-07-13 19:51:39,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20349 to 19030. [2021-07-13 19:51:39,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19030 states, 19029 states have (on average 2.2227652530348414) internal successors, (42297), 19029 states have internal predecessors, (42297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:39,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19030 states to 19030 states and 42297 transitions. [2021-07-13 19:51:39,458 INFO L78 Accepts]: Start accepts. Automaton has 19030 states and 42297 transitions. Word has length 46 [2021-07-13 19:51:39,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:39,458 INFO L482 AbstractCegarLoop]: Abstraction has 19030 states and 42297 transitions. [2021-07-13 19:51:39,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:39,459 INFO L276 IsEmpty]: Start isEmpty. Operand 19030 states and 42297 transitions. [2021-07-13 19:51:39,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 19:51:39,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:39,474 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:39,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-07-13 19:51:39,674 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:39,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:39,675 INFO L82 PathProgramCache]: Analyzing trace with hash -2040988117, now seen corresponding path program 30 times [2021-07-13 19:51:39,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:39,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192060559] [2021-07-13 19:51:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:39,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:39,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192060559] [2021-07-13 19:51:39,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192060559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:39,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207495307] [2021-07-13 19:51:39,722 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 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 [2021-07-13 19:51:39,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:51:39,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:39,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:51:39,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:39,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207495307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:39,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:39,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:51:39,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906228749] [2021-07-13 19:51:39,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:51:39,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:39,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:51:39,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:51:39,830 INFO L87 Difference]: Start difference. First operand 19030 states and 42297 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:40,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:40,011 INFO L93 Difference]: Finished difference Result 20409 states and 44584 transitions. [2021-07-13 19:51:40,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:51:40,012 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-13 19:51:40,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:40,057 INFO L225 Difference]: With dead ends: 20409 [2021-07-13 19:51:40,057 INFO L226 Difference]: Without dead ends: 20337 [2021-07-13 19:51:40,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:51:40,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20337 states. [2021-07-13 19:51:40,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20337 to 19030. [2021-07-13 19:51:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19030 states, 19029 states have (on average 2.216459088759262) internal successors, (42177), 19029 states have internal predecessors, (42177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:40,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19030 states to 19030 states and 42177 transitions. [2021-07-13 19:51:40,587 INFO L78 Accepts]: Start accepts. Automaton has 19030 states and 42177 transitions. Word has length 46 [2021-07-13 19:51:40,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:40,587 INFO L482 AbstractCegarLoop]: Abstraction has 19030 states and 42177 transitions. [2021-07-13 19:51:40,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:40,587 INFO L276 IsEmpty]: Start isEmpty. Operand 19030 states and 42177 transitions. [2021-07-13 19:51:40,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 19:51:40,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:40,602 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:40,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-13 19:51:40,803 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:40,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:40,803 INFO L82 PathProgramCache]: Analyzing trace with hash -678956667, now seen corresponding path program 31 times [2021-07-13 19:51:40,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:40,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814106686] [2021-07-13 19:51:40,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:40,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:40,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814106686] [2021-07-13 19:51:40,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814106686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:40,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69220368] [2021-07-13 19:51:40,858 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 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 [2021-07-13 19:51:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:40,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:51:40,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:40,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69220368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:40,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:40,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:51:40,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968441322] [2021-07-13 19:51:40,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:51:40,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:40,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:51:40,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:51:40,969 INFO L87 Difference]: Start difference. First operand 19030 states and 42177 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:41,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:41,161 INFO L93 Difference]: Finished difference Result 20155 states and 44063 transitions. [2021-07-13 19:51:41,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:51:41,162 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-13 19:51:41,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:41,198 INFO L225 Difference]: With dead ends: 20155 [2021-07-13 19:51:41,198 INFO L226 Difference]: Without dead ends: 20027 [2021-07-13 19:51:41,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:51:41,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20027 states. [2021-07-13 19:51:41,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20027 to 19078. [2021-07-13 19:51:41,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19078 states, 19077 states have (on average 2.210043507889081) internal successors, (42161), 19077 states have internal predecessors, (42161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:41,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19078 states to 19078 states and 42161 transitions. [2021-07-13 19:51:41,590 INFO L78 Accepts]: Start accepts. Automaton has 19078 states and 42161 transitions. Word has length 46 [2021-07-13 19:51:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:41,591 INFO L482 AbstractCegarLoop]: Abstraction has 19078 states and 42161 transitions. [2021-07-13 19:51:41,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:41,591 INFO L276 IsEmpty]: Start isEmpty. Operand 19078 states and 42161 transitions. [2021-07-13 19:51:41,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 19:51:41,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:41,606 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:41,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:41,806 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:41,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:41,806 INFO L82 PathProgramCache]: Analyzing trace with hash 2014335335, now seen corresponding path program 32 times [2021-07-13 19:51:41,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:41,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721727753] [2021-07-13 19:51:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:51:41,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:41,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721727753] [2021-07-13 19:51:41,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721727753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:41,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124861072] [2021-07-13 19:51:41,848 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 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 [2021-07-13 19:51:41,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:41,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:41,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:51:41,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:51:41,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124861072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:41,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:41,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:51:41,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634636788] [2021-07-13 19:51:41,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:51:41,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:41,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:51:41,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:51:41,954 INFO L87 Difference]: Start difference. First operand 19078 states and 42161 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:42,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:42,135 INFO L93 Difference]: Finished difference Result 20680 states and 45191 transitions. [2021-07-13 19:51:42,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:42,136 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-13 19:51:42,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:42,177 INFO L225 Difference]: With dead ends: 20680 [2021-07-13 19:51:42,177 INFO L226 Difference]: Without dead ends: 20680 [2021-07-13 19:51:42,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:51:42,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20680 states. [2021-07-13 19:51:42,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20680 to 17730. [2021-07-13 19:51:42,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17730 states, 17729 states have (on average 2.2009701618816626) internal successors, (39021), 17729 states have internal predecessors, (39021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:42,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17730 states to 17730 states and 39021 transitions. [2021-07-13 19:51:42,583 INFO L78 Accepts]: Start accepts. Automaton has 17730 states and 39021 transitions. Word has length 46 [2021-07-13 19:51:42,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:42,583 INFO L482 AbstractCegarLoop]: Abstraction has 17730 states and 39021 transitions. [2021-07-13 19:51:42,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:42,584 INFO L276 IsEmpty]: Start isEmpty. Operand 17730 states and 39021 transitions. [2021-07-13 19:51:42,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 19:51:42,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:42,598 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:42,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 19:51:42,799 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:42,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:42,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1597815803, now seen corresponding path program 33 times [2021-07-13 19:51:42,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:42,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197927156] [2021-07-13 19:51:42,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:51:42,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:42,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197927156] [2021-07-13 19:51:42,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197927156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:42,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022881389] [2021-07-13 19:51:42,836 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 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 [2021-07-13 19:51:42,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:51:42,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:42,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:51:42,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:51:42,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022881389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:42,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:42,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:51:42,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675789734] [2021-07-13 19:51:42,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:51:42,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:42,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:51:42,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:51:42,960 INFO L87 Difference]: Start difference. First operand 17730 states and 39021 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:43,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:43,120 INFO L93 Difference]: Finished difference Result 19104 states and 41588 transitions. [2021-07-13 19:51:43,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:43,120 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-13 19:51:43,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:43,154 INFO L225 Difference]: With dead ends: 19104 [2021-07-13 19:51:43,155 INFO L226 Difference]: Without dead ends: 19104 [2021-07-13 19:51:43,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:51:43,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19104 states. [2021-07-13 19:51:43,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19104 to 17742. [2021-07-13 19:51:43,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17742 states, 17741 states have (on average 2.200834225804633) internal successors, (39045), 17741 states have internal predecessors, (39045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17742 states to 17742 states and 39045 transitions. [2021-07-13 19:51:43,495 INFO L78 Accepts]: Start accepts. Automaton has 17742 states and 39045 transitions. Word has length 46 [2021-07-13 19:51:43,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:43,495 INFO L482 AbstractCegarLoop]: Abstraction has 17742 states and 39045 transitions. [2021-07-13 19:51:43,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:43,495 INFO L276 IsEmpty]: Start isEmpty. Operand 17742 states and 39045 transitions. [2021-07-13 19:51:43,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 19:51:43,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:43,510 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:43,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:43,711 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:43,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:43,711 INFO L82 PathProgramCache]: Analyzing trace with hash -2135850713, now seen corresponding path program 34 times [2021-07-13 19:51:43,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:43,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057062038] [2021-07-13 19:51:43,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:43,748 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:43,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:43,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057062038] [2021-07-13 19:51:43,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057062038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:43,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796688912] [2021-07-13 19:51:43,748 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 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 [2021-07-13 19:51:43,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:43,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:43,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:51:43,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:43,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796688912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:43,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:43,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 19:51:43,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11825945] [2021-07-13 19:51:43,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:51:43,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:43,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:51:43,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:51:43,844 INFO L87 Difference]: Start difference. First operand 17742 states and 39045 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:43,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:43,974 INFO L93 Difference]: Finished difference Result 21829 states and 47682 transitions. [2021-07-13 19:51:43,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:43,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-13 19:51:43,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:44,009 INFO L225 Difference]: With dead ends: 21829 [2021-07-13 19:51:44,009 INFO L226 Difference]: Without dead ends: 21829 [2021-07-13 19:51:44,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:51:44,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21829 states. [2021-07-13 19:51:44,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21829 to 20406. [2021-07-13 19:51:44,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20406 states, 20405 states have (on average 2.2182308257779955) internal successors, (45263), 20405 states have internal predecessors, (45263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:44,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20406 states to 20406 states and 45263 transitions. [2021-07-13 19:51:44,405 INFO L78 Accepts]: Start accepts. Automaton has 20406 states and 45263 transitions. Word has length 46 [2021-07-13 19:51:44,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:44,405 INFO L482 AbstractCegarLoop]: Abstraction has 20406 states and 45263 transitions. [2021-07-13 19:51:44,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:44,405 INFO L276 IsEmpty]: Start isEmpty. Operand 20406 states and 45263 transitions. [2021-07-13 19:51:44,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 19:51:44,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:44,420 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:44,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-13 19:51:44,621 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:44,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:44,621 INFO L82 PathProgramCache]: Analyzing trace with hash -965794713, now seen corresponding path program 35 times [2021-07-13 19:51:44,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:44,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245589939] [2021-07-13 19:51:44,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:44,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:44,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245589939] [2021-07-13 19:51:44,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245589939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:44,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140591750] [2021-07-13 19:51:44,653 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 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 [2021-07-13 19:51:44,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:51:44,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:44,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:51:44,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:44,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140591750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:44,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:44,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 19:51:44,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708209225] [2021-07-13 19:51:44,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:51:44,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:44,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:51:44,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:51:44,761 INFO L87 Difference]: Start difference. First operand 20406 states and 45263 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:44,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:44,885 INFO L93 Difference]: Finished difference Result 21712 states and 47427 transitions. [2021-07-13 19:51:44,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:44,885 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-13 19:51:44,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:44,915 INFO L225 Difference]: With dead ends: 21712 [2021-07-13 19:51:44,915 INFO L226 Difference]: Without dead ends: 21704 [2021-07-13 19:51:44,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:51:44,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21704 states. [2021-07-13 19:51:45,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21704 to 20402. [2021-07-13 19:51:45,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20402 states, 20401 states have (on average 2.21768540757806) internal successors, (45243), 20401 states have internal predecessors, (45243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:45,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20402 states to 20402 states and 45243 transitions. [2021-07-13 19:51:45,324 INFO L78 Accepts]: Start accepts. Automaton has 20402 states and 45243 transitions. Word has length 46 [2021-07-13 19:51:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:45,324 INFO L482 AbstractCegarLoop]: Abstraction has 20402 states and 45243 transitions. [2021-07-13 19:51:45,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:45,324 INFO L276 IsEmpty]: Start isEmpty. Operand 20402 states and 45243 transitions. [2021-07-13 19:51:45,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-13 19:51:45,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:45,339 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:45,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:45,540 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:45,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:45,540 INFO L82 PathProgramCache]: Analyzing trace with hash 792432717, now seen corresponding path program 36 times [2021-07-13 19:51:45,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:45,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153482866] [2021-07-13 19:51:45,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:45,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:45,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153482866] [2021-07-13 19:51:45,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153482866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:45,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842866877] [2021-07-13 19:51:45,574 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:45,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:51:45,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:45,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:51:45,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 19:51:45,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842866877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:45,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:45,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-07-13 19:51:45,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690890852] [2021-07-13 19:51:45,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:51:45,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:45,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:51:45,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:51:45,701 INFO L87 Difference]: Start difference. First operand 20402 states and 45243 transitions. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:46,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:46,343 INFO L93 Difference]: Finished difference Result 28400 states and 61628 transitions. [2021-07-13 19:51:46,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:51:46,343 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-13 19:51:46,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:46,380 INFO L225 Difference]: With dead ends: 28400 [2021-07-13 19:51:46,380 INFO L226 Difference]: Without dead ends: 28376 [2021-07-13 19:51:46,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 273.5ms TimeCoverageRelationStatistics Valid=321, Invalid=1161, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:51:46,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28376 states. [2021-07-13 19:51:46,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28376 to 20402. [2021-07-13 19:51:46,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20402 states, 20401 states have (on average 2.212979755894319) internal successors, (45147), 20401 states have internal predecessors, (45147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:46,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20402 states to 20402 states and 45147 transitions. [2021-07-13 19:51:46,659 INFO L78 Accepts]: Start accepts. Automaton has 20402 states and 45147 transitions. Word has length 46 [2021-07-13 19:51:46,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:46,659 INFO L482 AbstractCegarLoop]: Abstraction has 20402 states and 45147 transitions. [2021-07-13 19:51:46,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:46,660 INFO L276 IsEmpty]: Start isEmpty. Operand 20402 states and 45147 transitions. [2021-07-13 19:51:46,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:51:46,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:46,682 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:46,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 19:51:46,884 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:46,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:46,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2089254534, now seen corresponding path program 37 times [2021-07-13 19:51:46,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:46,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387545594] [2021-07-13 19:51:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:46,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:46,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387545594] [2021-07-13 19:51:46,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387545594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:46,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017391154] [2021-07-13 19:51:46,948 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 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 [2021-07-13 19:51:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:46,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:51:46,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:47,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017391154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:47,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:47,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:51:47,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469410008] [2021-07-13 19:51:47,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:51:47,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:47,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:51:47,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:51:47,159 INFO L87 Difference]: Start difference. First operand 20402 states and 45147 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:47,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:47,397 INFO L93 Difference]: Finished difference Result 25889 states and 56595 transitions. [2021-07-13 19:51:47,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:51:47,397 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:51:47,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:47,441 INFO L225 Difference]: With dead ends: 25889 [2021-07-13 19:51:47,441 INFO L226 Difference]: Without dead ends: 25889 [2021-07-13 19:51:47,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:51:47,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25889 states. [2021-07-13 19:51:47,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25889 to 21836. [2021-07-13 19:51:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21836 states, 21835 states have (on average 2.216762079230593) internal successors, (48403), 21835 states have internal predecessors, (48403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:47,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21836 states to 21836 states and 48403 transitions. [2021-07-13 19:51:47,911 INFO L78 Accepts]: Start accepts. Automaton has 21836 states and 48403 transitions. Word has length 56 [2021-07-13 19:51:47,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:47,911 INFO L482 AbstractCegarLoop]: Abstraction has 21836 states and 48403 transitions. [2021-07-13 19:51:47,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:47,911 INFO L276 IsEmpty]: Start isEmpty. Operand 21836 states and 48403 transitions. [2021-07-13 19:51:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:51:47,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:47,933 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:48,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 19:51:48,134 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:48,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:48,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1587046395, now seen corresponding path program 38 times [2021-07-13 19:51:48,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:48,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321034058] [2021-07-13 19:51:48,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:48,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:48,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321034058] [2021-07-13 19:51:48,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321034058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:48,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872542122] [2021-07-13 19:51:48,206 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 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 [2021-07-13 19:51:48,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:48,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:48,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:51:48,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:48,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872542122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:48,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:48,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:51:48,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693082445] [2021-07-13 19:51:48,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:51:48,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:48,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:51:48,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:51:48,315 INFO L87 Difference]: Start difference. First operand 21836 states and 48403 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:48,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:48,554 INFO L93 Difference]: Finished difference Result 31481 states and 69778 transitions. [2021-07-13 19:51:48,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:51:48,554 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:51:48,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:48,606 INFO L225 Difference]: With dead ends: 31481 [2021-07-13 19:51:48,606 INFO L226 Difference]: Without dead ends: 31323 [2021-07-13 19:51:48,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:51:48,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31323 states. [2021-07-13 19:51:49,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31323 to 30212. [2021-07-13 19:51:49,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30212 states, 30211 states have (on average 2.2320015888252622) internal successors, (67431), 30211 states have internal predecessors, (67431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30212 states to 30212 states and 67431 transitions. [2021-07-13 19:51:49,164 INFO L78 Accepts]: Start accepts. Automaton has 30212 states and 67431 transitions. Word has length 56 [2021-07-13 19:51:49,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:49,164 INFO L482 AbstractCegarLoop]: Abstraction has 30212 states and 67431 transitions. [2021-07-13 19:51:49,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:49,165 INFO L276 IsEmpty]: Start isEmpty. Operand 30212 states and 67431 transitions. [2021-07-13 19:51:49,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:51:49,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:49,194 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:49,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:49,394 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:49,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:49,395 INFO L82 PathProgramCache]: Analyzing trace with hash -406238257, now seen corresponding path program 39 times [2021-07-13 19:51:49,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:49,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814201878] [2021-07-13 19:51:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 39 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:49,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:49,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814201878] [2021-07-13 19:51:49,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814201878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:49,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400193513] [2021-07-13 19:51:49,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:51:49,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:51:49,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:49,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:51:49,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 39 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:49,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400193513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:49,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:49,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:51:49,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139539316] [2021-07-13 19:51:49,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:51:49,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:49,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:51:49,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:51:49,733 INFO L87 Difference]: Start difference. First operand 30212 states and 67431 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:49,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:49,943 INFO L93 Difference]: Finished difference Result 31139 states and 68850 transitions. [2021-07-13 19:51:49,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:51:49,944 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:51:49,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:49,995 INFO L225 Difference]: With dead ends: 31139 [2021-07-13 19:51:49,995 INFO L226 Difference]: Without dead ends: 31139 [2021-07-13 19:51:49,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:51:50,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31139 states. [2021-07-13 19:51:50,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31139 to 28244. [2021-07-13 19:51:50,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28244 states, 28243 states have (on average 2.2232411571008743) internal successors, (62791), 28243 states have internal predecessors, (62791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:50,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28244 states to 28244 states and 62791 transitions. [2021-07-13 19:51:50,539 INFO L78 Accepts]: Start accepts. Automaton has 28244 states and 62791 transitions. Word has length 56 [2021-07-13 19:51:50,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:50,539 INFO L482 AbstractCegarLoop]: Abstraction has 28244 states and 62791 transitions. [2021-07-13 19:51:50,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:50,539 INFO L276 IsEmpty]: Start isEmpty. Operand 28244 states and 62791 transitions. [2021-07-13 19:51:50,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:51:50,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:50,569 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:50,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-07-13 19:51:50,770 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:50,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:50,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1169425338, now seen corresponding path program 40 times [2021-07-13 19:51:50,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:50,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929311397] [2021-07-13 19:51:50,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:50,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:50,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929311397] [2021-07-13 19:51:50,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929311397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:50,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453817738] [2021-07-13 19:51:50,821 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 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 [2021-07-13 19:51:50,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:50,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:50,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:51:50,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:50,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453817738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:50,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:50,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:51:50,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839288315] [2021-07-13 19:51:50,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:51:50,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:50,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:51:50,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:51:50,968 INFO L87 Difference]: Start difference. First operand 28244 states and 62791 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:51,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:51,285 INFO L93 Difference]: Finished difference Result 29356 states and 64669 transitions. [2021-07-13 19:51:51,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:51:51,285 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:51:51,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:51,331 INFO L225 Difference]: With dead ends: 29356 [2021-07-13 19:51:51,331 INFO L226 Difference]: Without dead ends: 29352 [2021-07-13 19:51:51,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:51:51,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29352 states. [2021-07-13 19:51:51,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29352 to 27360. [2021-07-13 19:51:51,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27360 states, 27359 states have (on average 2.2246061625059395) internal successors, (60863), 27359 states have internal predecessors, (60863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:51,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27360 states to 27360 states and 60863 transitions. [2021-07-13 19:51:51,812 INFO L78 Accepts]: Start accepts. Automaton has 27360 states and 60863 transitions. Word has length 56 [2021-07-13 19:51:51,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:51,812 INFO L482 AbstractCegarLoop]: Abstraction has 27360 states and 60863 transitions. [2021-07-13 19:51:51,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:51,812 INFO L276 IsEmpty]: Start isEmpty. Operand 27360 states and 60863 transitions. [2021-07-13 19:51:51,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:51:51,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:51,838 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:52,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:52,039 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:52,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:52,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1352781062, now seen corresponding path program 41 times [2021-07-13 19:51:52,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:52,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664608863] [2021-07-13 19:51:52,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:52,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:52,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664608863] [2021-07-13 19:51:52,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664608863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:52,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861113130] [2021-07-13 19:51:52,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:52,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:51:52,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:52,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:51:52,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:52,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861113130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:52,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:52,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:51:52,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679523967] [2021-07-13 19:51:52,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:51:52,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:52,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:51:52,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:51:52,217 INFO L87 Difference]: Start difference. First operand 27360 states and 60863 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:52,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:52,401 INFO L93 Difference]: Finished difference Result 35236 states and 77241 transitions. [2021-07-13 19:51:52,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:51:52,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:51:52,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:52,465 INFO L225 Difference]: With dead ends: 35236 [2021-07-13 19:51:52,465 INFO L226 Difference]: Without dead ends: 35236 [2021-07-13 19:51:52,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:51:52,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35236 states. [2021-07-13 19:51:53,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35236 to 31608. [2021-07-13 19:51:53,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31608 states, 31607 states have (on average 2.2330180023412534) internal successors, (70579), 31607 states have internal predecessors, (70579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:53,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31608 states to 31608 states and 70579 transitions. [2021-07-13 19:51:53,220 INFO L78 Accepts]: Start accepts. Automaton has 31608 states and 70579 transitions. Word has length 56 [2021-07-13 19:51:53,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:53,220 INFO L482 AbstractCegarLoop]: Abstraction has 31608 states and 70579 transitions. [2021-07-13 19:51:53,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:53,220 INFO L276 IsEmpty]: Start isEmpty. Operand 31608 states and 70579 transitions. [2021-07-13 19:51:53,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:51:53,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:53,250 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:53,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:53,451 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:53,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:53,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1947231365, now seen corresponding path program 42 times [2021-07-13 19:51:53,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:53,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325817082] [2021-07-13 19:51:53,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:53,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:53,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325817082] [2021-07-13 19:51:53,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325817082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:53,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607555714] [2021-07-13 19:51:53,493 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:53,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:51:53,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:53,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:51:53,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:53,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607555714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:53,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:53,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:51:53,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524316585] [2021-07-13 19:51:53,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:51:53,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:53,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:51:53,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:51:53,627 INFO L87 Difference]: Start difference. First operand 31608 states and 70579 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:53,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:53,827 INFO L93 Difference]: Finished difference Result 34730 states and 77163 transitions. [2021-07-13 19:51:53,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:51:53,827 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:51:53,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:53,885 INFO L225 Difference]: With dead ends: 34730 [2021-07-13 19:51:53,886 INFO L226 Difference]: Without dead ends: 34724 [2021-07-13 19:51:53,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:51:53,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34724 states. [2021-07-13 19:51:54,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34724 to 33620. [2021-07-13 19:51:54,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33620 states, 33619 states have (on average 2.240013087837235) internal successors, (75307), 33619 states have internal predecessors, (75307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33620 states to 33620 states and 75307 transitions. [2021-07-13 19:51:54,653 INFO L78 Accepts]: Start accepts. Automaton has 33620 states and 75307 transitions. Word has length 56 [2021-07-13 19:51:54,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:54,653 INFO L482 AbstractCegarLoop]: Abstraction has 33620 states and 75307 transitions. [2021-07-13 19:51:54,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:54,653 INFO L276 IsEmpty]: Start isEmpty. Operand 33620 states and 75307 transitions. [2021-07-13 19:51:54,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:51:54,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:54,681 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:54,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 19:51:54,882 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:54,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:54,884 INFO L82 PathProgramCache]: Analyzing trace with hash -672843825, now seen corresponding path program 43 times [2021-07-13 19:51:54,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:54,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9771007] [2021-07-13 19:51:54,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:54,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:54,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9771007] [2021-07-13 19:51:54,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9771007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:54,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046636816] [2021-07-13 19:51:54,917 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:54,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:54,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:51:54,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:55,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046636816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:55,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:55,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:51:55,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405454727] [2021-07-13 19:51:55,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:51:55,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:55,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:51:55,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:51:55,029 INFO L87 Difference]: Start difference. First operand 33620 states and 75307 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:55,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:55,209 INFO L93 Difference]: Finished difference Result 35642 states and 78991 transitions. [2021-07-13 19:51:55,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:51:55,210 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:51:55,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:55,269 INFO L225 Difference]: With dead ends: 35642 [2021-07-13 19:51:55,269 INFO L226 Difference]: Without dead ends: 35640 [2021-07-13 19:51:55,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:51:55,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35640 states. [2021-07-13 19:51:55,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35640 to 33704. [2021-07-13 19:51:55,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33704 states, 33703 states have (on average 2.237159896745097) internal successors, (75399), 33703 states have internal predecessors, (75399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:56,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33704 states to 33704 states and 75399 transitions. [2021-07-13 19:51:56,022 INFO L78 Accepts]: Start accepts. Automaton has 33704 states and 75399 transitions. Word has length 56 [2021-07-13 19:51:56,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:56,022 INFO L482 AbstractCegarLoop]: Abstraction has 33704 states and 75399 transitions. [2021-07-13 19:51:56,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:56,022 INFO L276 IsEmpty]: Start isEmpty. Operand 33704 states and 75399 transitions. [2021-07-13 19:51:56,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:51:56,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:56,056 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:56,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:56,257 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:56,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:56,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1436030906, now seen corresponding path program 44 times [2021-07-13 19:51:56,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:56,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617928109] [2021-07-13 19:51:56,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:56,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:56,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617928109] [2021-07-13 19:51:56,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617928109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:56,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534350937] [2021-07-13 19:51:56,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:56,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:51:56,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:56,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:51:56,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:51:56,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534350937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:56,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:56,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:51:56,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442862962] [2021-07-13 19:51:56,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:51:56,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:56,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:51:56,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:51:56,432 INFO L87 Difference]: Start difference. First operand 33704 states and 75399 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:56,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:56,643 INFO L93 Difference]: Finished difference Result 35791 states and 78899 transitions. [2021-07-13 19:51:56,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:51:56,643 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:51:56,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:56,703 INFO L225 Difference]: With dead ends: 35791 [2021-07-13 19:51:56,703 INFO L226 Difference]: Without dead ends: 35723 [2021-07-13 19:51:56,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:51:56,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35723 states. [2021-07-13 19:51:57,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35723 to 33624. [2021-07-13 19:51:57,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33624 states, 33623 states have (on average 2.2343931237545727) internal successors, (75127), 33623 states have internal predecessors, (75127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:57,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33624 states to 33624 states and 75127 transitions. [2021-07-13 19:51:57,309 INFO L78 Accepts]: Start accepts. Automaton has 33624 states and 75127 transitions. Word has length 56 [2021-07-13 19:51:57,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:57,309 INFO L482 AbstractCegarLoop]: Abstraction has 33624 states and 75127 transitions. [2021-07-13 19:51:57,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:57,309 INFO L276 IsEmpty]: Start isEmpty. Operand 33624 states and 75127 transitions. [2021-07-13 19:51:57,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:51:57,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:57,502 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:57,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 19:51:57,705 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:57,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:57,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1252301819, now seen corresponding path program 45 times [2021-07-13 19:51:57,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:57,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409235439] [2021-07-13 19:51:57,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:57,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:57,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:57,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409235439] [2021-07-13 19:51:57,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409235439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:57,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464750152] [2021-07-13 19:51:57,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:57,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:51:57,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:57,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:51:57,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:57,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464750152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:57,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:57,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:51:57,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42778321] [2021-07-13 19:51:57,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:51:57,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:57,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:51:57,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:51:57,858 INFO L87 Difference]: Start difference. First operand 33624 states and 75127 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:58,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:58,052 INFO L93 Difference]: Finished difference Result 35258 states and 78007 transitions. [2021-07-13 19:51:58,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:51:58,053 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:51:58,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:58,112 INFO L225 Difference]: With dead ends: 35258 [2021-07-13 19:51:58,112 INFO L226 Difference]: Without dead ends: 35256 [2021-07-13 19:51:58,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:51:58,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35256 states. [2021-07-13 19:51:58,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35256 to 33208. [2021-07-13 19:51:58,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33208 states, 33207 states have (on average 2.2308248260908843) internal successors, (74079), 33207 states have internal predecessors, (74079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:58,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33208 states to 33208 states and 74079 transitions. [2021-07-13 19:51:58,666 INFO L78 Accepts]: Start accepts. Automaton has 33208 states and 74079 transitions. Word has length 56 [2021-07-13 19:51:58,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:58,666 INFO L482 AbstractCegarLoop]: Abstraction has 33208 states and 74079 transitions. [2021-07-13 19:51:58,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:58,666 INFO L276 IsEmpty]: Start isEmpty. Operand 33208 states and 74079 transitions. [2021-07-13 19:51:58,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:51:58,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:58,693 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:58,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 19:51:58,902 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:58,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:58,903 INFO L82 PathProgramCache]: Analyzing trace with hash 322196524, now seen corresponding path program 46 times [2021-07-13 19:51:58,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:58,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933335291] [2021-07-13 19:51:58,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:58,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:58,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933335291] [2021-07-13 19:51:58,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933335291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:58,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313066964] [2021-07-13 19:51:58,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:51:58,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:58,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:58,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:51:58,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:59,150 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-13 19:51:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:59,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313066964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:59,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:59,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:51:59,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696936715] [2021-07-13 19:51:59,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:51:59,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:59,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:51:59,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:51:59,193 INFO L87 Difference]: Start difference. First operand 33208 states and 74079 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:59,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:59,425 INFO L93 Difference]: Finished difference Result 34889 states and 76950 transitions. [2021-07-13 19:51:59,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:51:59,426 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:51:59,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:59,485 INFO L225 Difference]: With dead ends: 34889 [2021-07-13 19:51:59,486 INFO L226 Difference]: Without dead ends: 34865 [2021-07-13 19:51:59,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:51:59,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34865 states. [2021-07-13 19:52:00,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34865 to 33208. [2021-07-13 19:52:00,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33208 states, 33207 states have (on average 2.2297407173186374) internal successors, (74043), 33207 states have internal predecessors, (74043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:00,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33208 states to 33208 states and 74043 transitions. [2021-07-13 19:52:00,100 INFO L78 Accepts]: Start accepts. Automaton has 33208 states and 74043 transitions. Word has length 56 [2021-07-13 19:52:00,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:00,100 INFO L482 AbstractCegarLoop]: Abstraction has 33208 states and 74043 transitions. [2021-07-13 19:52:00,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:00,100 INFO L276 IsEmpty]: Start isEmpty. Operand 33208 states and 74043 transitions. [2021-07-13 19:52:00,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:00,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:00,128 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:00,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 19:52:00,329 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:00,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:00,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1132404711, now seen corresponding path program 47 times [2021-07-13 19:52:00,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:00,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034789186] [2021-07-13 19:52:00,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:52:00,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:00,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034789186] [2021-07-13 19:52:00,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034789186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:00,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590510240] [2021-07-13 19:52:00,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:00,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:52:00,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:00,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:00,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:52:00,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590510240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:00,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:00,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:52:00,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794205731] [2021-07-13 19:52:00,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:52:00,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:00,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:52:00,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:52:00,487 INFO L87 Difference]: Start difference. First operand 33208 states and 74043 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-07-13 19:52:00,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:00,863 INFO L93 Difference]: Finished difference Result 35848 states and 79532 transitions. [2021-07-13 19:52:00,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:52:00,877 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 56 [2021-07-13 19:52:00,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:00,960 INFO L225 Difference]: With dead ends: 35848 [2021-07-13 19:52:00,960 INFO L226 Difference]: Without dead ends: 35812 [2021-07-13 19:52:00,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:52:01,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35812 states. [2021-07-13 19:52:01,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35812 to 32944. [2021-07-13 19:52:01,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32944 states, 32943 states have (on average 2.231581823149076) internal successors, (73515), 32943 states have internal predecessors, (73515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:01,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32944 states to 32944 states and 73515 transitions. [2021-07-13 19:52:01,589 INFO L78 Accepts]: Start accepts. Automaton has 32944 states and 73515 transitions. Word has length 56 [2021-07-13 19:52:01,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:01,590 INFO L482 AbstractCegarLoop]: Abstraction has 32944 states and 73515 transitions. [2021-07-13 19:52:01,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-07-13 19:52:01,590 INFO L276 IsEmpty]: Start isEmpty. Operand 32944 states and 73515 transitions. [2021-07-13 19:52:01,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:01,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:01,616 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:01,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 19:52:01,817 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:01,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:01,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1848773382, now seen corresponding path program 48 times [2021-07-13 19:52:01,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:01,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781633459] [2021-07-13 19:52:01,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:01,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:01,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781633459] [2021-07-13 19:52:01,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781633459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:01,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299370673] [2021-07-13 19:52:01,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:52:01,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:52:01,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:01,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:01,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:01,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299370673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:01,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:01,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:52:01,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337934605] [2021-07-13 19:52:01,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:52:01,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:01,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:52:01,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:52:01,962 INFO L87 Difference]: Start difference. First operand 32944 states and 73515 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:02,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:02,149 INFO L93 Difference]: Finished difference Result 40718 states and 89870 transitions. [2021-07-13 19:52:02,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:52:02,150 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:52:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:02,226 INFO L225 Difference]: With dead ends: 40718 [2021-07-13 19:52:02,226 INFO L226 Difference]: Without dead ends: 40718 [2021-07-13 19:52:02,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:52:02,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40718 states. [2021-07-13 19:52:03,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40718 to 37152. [2021-07-13 19:52:03,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37152 states, 37151 states have (on average 2.2417431563080403) internal successors, (83283), 37151 states have internal predecessors, (83283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:03,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37152 states to 37152 states and 83283 transitions. [2021-07-13 19:52:03,126 INFO L78 Accepts]: Start accepts. Automaton has 37152 states and 83283 transitions. Word has length 56 [2021-07-13 19:52:03,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:03,126 INFO L482 AbstractCegarLoop]: Abstraction has 37152 states and 83283 transitions. [2021-07-13 19:52:03,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:03,126 INFO L276 IsEmpty]: Start isEmpty. Operand 37152 states and 83283 transitions. [2021-07-13 19:52:03,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:03,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:03,152 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:03,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:03,353 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:03,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:03,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1451239045, now seen corresponding path program 49 times [2021-07-13 19:52:03,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:03,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855631976] [2021-07-13 19:52:03,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:03,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:03,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855631976] [2021-07-13 19:52:03,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855631976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:03,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437626044] [2021-07-13 19:52:03,387 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 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 [2021-07-13 19:52:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:03,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:03,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:03,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437626044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:03,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:03,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:52:03,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90842946] [2021-07-13 19:52:03,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:52:03,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:03,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:52:03,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:52:03,502 INFO L87 Difference]: Start difference. First operand 37152 states and 83283 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:03,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:03,759 INFO L93 Difference]: Finished difference Result 40524 states and 90274 transitions. [2021-07-13 19:52:03,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:52:03,760 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:52:03,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:03,844 INFO L225 Difference]: With dead ends: 40524 [2021-07-13 19:52:03,844 INFO L226 Difference]: Without dead ends: 40488 [2021-07-13 19:52:03,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:52:03,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40488 states. [2021-07-13 19:52:04,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40488 to 36712. [2021-07-13 19:52:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36712 states, 36711 states have (on average 2.242025550924791) internal successors, (82307), 36711 states have internal predecessors, (82307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:04,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36712 states to 36712 states and 82307 transitions. [2021-07-13 19:52:04,675 INFO L78 Accepts]: Start accepts. Automaton has 36712 states and 82307 transitions. Word has length 56 [2021-07-13 19:52:04,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:04,675 INFO L482 AbstractCegarLoop]: Abstraction has 36712 states and 82307 transitions. [2021-07-13 19:52:04,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:04,675 INFO L276 IsEmpty]: Start isEmpty. Operand 36712 states and 82307 transitions. [2021-07-13 19:52:04,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:04,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:04,703 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:04,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:04,904 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:04,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:04,904 INFO L82 PathProgramCache]: Analyzing trace with hash -176851505, now seen corresponding path program 50 times [2021-07-13 19:52:04,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:04,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584304458] [2021-07-13 19:52:04,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:04,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:04,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584304458] [2021-07-13 19:52:04,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584304458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:04,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448379525] [2021-07-13 19:52:04,939 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 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 [2021-07-13 19:52:04,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:04,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:04,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:04,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:05,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448379525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:05,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:05,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:52:05,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423048224] [2021-07-13 19:52:05,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:52:05,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:05,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:52:05,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:52:05,061 INFO L87 Difference]: Start difference. First operand 36712 states and 82307 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:05,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:05,277 INFO L93 Difference]: Finished difference Result 39280 states and 87158 transitions. [2021-07-13 19:52:05,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:52:05,277 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:52:05,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:05,342 INFO L225 Difference]: With dead ends: 39280 [2021-07-13 19:52:05,342 INFO L226 Difference]: Without dead ends: 39278 [2021-07-13 19:52:05,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:52:05,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39278 states. [2021-07-13 19:52:06,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39278 to 36836. [2021-07-13 19:52:06,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36836 states, 36835 states have (on average 2.2415365820551107) internal successors, (82567), 36835 states have internal predecessors, (82567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:06,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36836 states to 36836 states and 82567 transitions. [2021-07-13 19:52:06,274 INFO L78 Accepts]: Start accepts. Automaton has 36836 states and 82567 transitions. Word has length 56 [2021-07-13 19:52:06,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:06,274 INFO L482 AbstractCegarLoop]: Abstraction has 36836 states and 82567 transitions. [2021-07-13 19:52:06,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:06,274 INFO L276 IsEmpty]: Start isEmpty. Operand 36836 states and 82567 transitions. [2021-07-13 19:52:06,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:06,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:06,300 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:06,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:06,501 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:06,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:06,501 INFO L82 PathProgramCache]: Analyzing trace with hash -940038586, now seen corresponding path program 51 times [2021-07-13 19:52:06,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:06,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471526175] [2021-07-13 19:52:06,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:06,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:06,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471526175] [2021-07-13 19:52:06,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471526175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:06,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209780417] [2021-07-13 19:52:06,536 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 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 [2021-07-13 19:52:06,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:52:06,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:06,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:52:06,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-07-13 19:52:06,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209780417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:06,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:06,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:52:06,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441583186] [2021-07-13 19:52:06,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:52:06,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:06,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:52:06,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:06,719 INFO L87 Difference]: Start difference. First operand 36836 states and 82567 transitions. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:07,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:07,758 INFO L93 Difference]: Finished difference Result 65704 states and 142418 transitions. [2021-07-13 19:52:07,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 19:52:07,759 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:52:07,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:07,876 INFO L225 Difference]: With dead ends: 65704 [2021-07-13 19:52:07,876 INFO L226 Difference]: Without dead ends: 65560 [2021-07-13 19:52:07,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 473.7ms TimeCoverageRelationStatistics Valid=437, Invalid=2755, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 19:52:07,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65560 states. [2021-07-13 19:52:08,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65560 to 50470. [2021-07-13 19:52:08,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50470 states, 50469 states have (on average 2.2044225167924867) internal successors, (111255), 50469 states have internal predecessors, (111255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:09,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50470 states to 50470 states and 111255 transitions. [2021-07-13 19:52:09,049 INFO L78 Accepts]: Start accepts. Automaton has 50470 states and 111255 transitions. Word has length 56 [2021-07-13 19:52:09,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:09,049 INFO L482 AbstractCegarLoop]: Abstraction has 50470 states and 111255 transitions. [2021-07-13 19:52:09,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:09,049 INFO L276 IsEmpty]: Start isEmpty. Operand 50470 states and 111255 transitions. [2021-07-13 19:52:09,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:09,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:09,085 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:09,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-13 19:52:09,286 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:09,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:09,286 INFO L82 PathProgramCache]: Analyzing trace with hash -756309499, now seen corresponding path program 52 times [2021-07-13 19:52:09,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:09,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213073578] [2021-07-13 19:52:09,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:09,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:09,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213073578] [2021-07-13 19:52:09,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213073578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:09,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286625488] [2021-07-13 19:52:09,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:09,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:09,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:09,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:09,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:09,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286625488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:09,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:09,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:52:09,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130143184] [2021-07-13 19:52:09,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:52:09,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:09,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:52:09,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:52:09,453 INFO L87 Difference]: Start difference. First operand 50470 states and 111255 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:09,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:09,770 INFO L93 Difference]: Finished difference Result 57450 states and 125218 transitions. [2021-07-13 19:52:09,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:52:09,770 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:52:09,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:10,108 INFO L225 Difference]: With dead ends: 57450 [2021-07-13 19:52:10,108 INFO L226 Difference]: Without dead ends: 57432 [2021-07-13 19:52:10,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:52:10,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57432 states. [2021-07-13 19:52:10,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57432 to 50730. [2021-07-13 19:52:10,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50730 states, 50729 states have (on average 2.2019554889708055) internal successors, (111703), 50729 states have internal predecessors, (111703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:11,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50730 states to 50730 states and 111703 transitions. [2021-07-13 19:52:11,047 INFO L78 Accepts]: Start accepts. Automaton has 50730 states and 111703 transitions. Word has length 56 [2021-07-13 19:52:11,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:11,047 INFO L482 AbstractCegarLoop]: Abstraction has 50730 states and 111703 transitions. [2021-07-13 19:52:11,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:11,048 INFO L276 IsEmpty]: Start isEmpty. Operand 50730 states and 111703 transitions. [2021-07-13 19:52:11,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:11,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:11,082 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:11,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:11,283 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:11,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:11,283 INFO L82 PathProgramCache]: Analyzing trace with hash 696555431, now seen corresponding path program 53 times [2021-07-13 19:52:11,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:11,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5665194] [2021-07-13 19:52:11,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:11,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:11,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5665194] [2021-07-13 19:52:11,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5665194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:11,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005090837] [2021-07-13 19:52:11,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:52:11,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:52:11,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:11,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:11,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:11,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005090837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:11,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:11,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:52:11,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314448695] [2021-07-13 19:52:11,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:52:11,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:11,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:52:11,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:52:11,713 INFO L87 Difference]: Start difference. First operand 50730 states and 111703 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:11,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:11,997 INFO L93 Difference]: Finished difference Result 53406 states and 116710 transitions. [2021-07-13 19:52:11,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:52:11,997 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:52:11,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:12,100 INFO L225 Difference]: With dead ends: 53406 [2021-07-13 19:52:12,100 INFO L226 Difference]: Without dead ends: 53388 [2021-07-13 19:52:12,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:12,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53388 states. [2021-07-13 19:52:13,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53388 to 45578. [2021-07-13 19:52:13,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45578 states, 45577 states have (on average 2.197402198477302) internal successors, (100151), 45577 states have internal predecessors, (100151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:13,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45578 states to 45578 states and 100151 transitions. [2021-07-13 19:52:13,155 INFO L78 Accepts]: Start accepts. Automaton has 45578 states and 100151 transitions. Word has length 56 [2021-07-13 19:52:13,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:13,155 INFO L482 AbstractCegarLoop]: Abstraction has 45578 states and 100151 transitions. [2021-07-13 19:52:13,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:13,155 INFO L276 IsEmpty]: Start isEmpty. Operand 45578 states and 100151 transitions. [2021-07-13 19:52:13,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:13,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:13,181 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:13,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 19:52:13,382 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:13,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:13,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1890704965, now seen corresponding path program 54 times [2021-07-13 19:52:13,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:13,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859428253] [2021-07-13 19:52:13,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-13 19:52:13,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:13,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859428253] [2021-07-13 19:52:13,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859428253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:13,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147318991] [2021-07-13 19:52:13,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:52:13,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:52:13,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:13,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:13,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-13 19:52:13,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147318991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:13,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:13,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:52:13,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600664442] [2021-07-13 19:52:13,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:52:13,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:13,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:52:13,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:52:13,534 INFO L87 Difference]: Start difference. First operand 45578 states and 100151 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:13,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:13,845 INFO L93 Difference]: Finished difference Result 49711 states and 108806 transitions. [2021-07-13 19:52:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:52:13,845 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:52:13,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:13,959 INFO L225 Difference]: With dead ends: 49711 [2021-07-13 19:52:13,959 INFO L226 Difference]: Without dead ends: 49645 [2021-07-13 19:52:13,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:14,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49645 states. [2021-07-13 19:52:14,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49645 to 48590. [2021-07-13 19:52:14,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48590 states, 48589 states have (on average 2.2018769680380332) internal successors, (106987), 48589 states have internal predecessors, (106987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48590 states to 48590 states and 106987 transitions. [2021-07-13 19:52:14,956 INFO L78 Accepts]: Start accepts. Automaton has 48590 states and 106987 transitions. Word has length 56 [2021-07-13 19:52:14,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:14,956 INFO L482 AbstractCegarLoop]: Abstraction has 48590 states and 106987 transitions. [2021-07-13 19:52:14,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:14,956 INFO L276 IsEmpty]: Start isEmpty. Operand 48590 states and 106987 transitions. [2021-07-13 19:52:14,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:14,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:14,984 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:15,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:15,185 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:15,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:15,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1907912891, now seen corresponding path program 55 times [2021-07-13 19:52:15,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:15,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277264086] [2021-07-13 19:52:15,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:52:15,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:15,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277264086] [2021-07-13 19:52:15,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277264086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:15,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132596115] [2021-07-13 19:52:15,219 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 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 [2021-07-13 19:52:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:15,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:15,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:52:15,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132596115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:15,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:15,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:52:15,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998430021] [2021-07-13 19:52:15,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:52:15,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:15,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:52:15,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:52:15,322 INFO L87 Difference]: Start difference. First operand 48590 states and 106987 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-07-13 19:52:15,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:15,559 INFO L93 Difference]: Finished difference Result 51903 states and 113860 transitions. [2021-07-13 19:52:15,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:52:15,559 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 56 [2021-07-13 19:52:15,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:15,866 INFO L225 Difference]: With dead ends: 51903 [2021-07-13 19:52:15,866 INFO L226 Difference]: Without dead ends: 51867 [2021-07-13 19:52:15,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:52:15,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51867 states. [2021-07-13 19:52:16,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51867 to 50962. [2021-07-13 19:52:16,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50962 states, 50961 states have (on average 2.2042542336296385) internal successors, (112331), 50961 states have internal predecessors, (112331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:16,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50962 states to 50962 states and 112331 transitions. [2021-07-13 19:52:16,728 INFO L78 Accepts]: Start accepts. Automaton has 50962 states and 112331 transitions. Word has length 56 [2021-07-13 19:52:16,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:16,728 INFO L482 AbstractCegarLoop]: Abstraction has 50962 states and 112331 transitions. [2021-07-13 19:52:16,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-07-13 19:52:16,729 INFO L276 IsEmpty]: Start isEmpty. Operand 50962 states and 112331 transitions. [2021-07-13 19:52:16,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:16,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:16,759 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:16,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 19:52:16,960 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:16,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:16,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1397558139, now seen corresponding path program 56 times [2021-07-13 19:52:16,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:16,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77607927] [2021-07-13 19:52:16,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:16,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:16,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77607927] [2021-07-13 19:52:16,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77607927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:16,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842046994] [2021-07-13 19:52:16,997 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 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 [2021-07-13 19:52:17,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:17,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:17,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:17,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:17,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842046994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:17,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:17,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:52:17,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237784251] [2021-07-13 19:52:17,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:52:17,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:17,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:52:17,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:52:17,123 INFO L87 Difference]: Start difference. First operand 50962 states and 112331 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:17,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:17,637 INFO L93 Difference]: Finished difference Result 54564 states and 119631 transitions. [2021-07-13 19:52:17,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:52:17,637 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:52:17,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:17,754 INFO L225 Difference]: With dead ends: 54564 [2021-07-13 19:52:17,755 INFO L226 Difference]: Without dead ends: 54522 [2021-07-13 19:52:17,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:52:17,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54522 states. [2021-07-13 19:52:18,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54522 to 50922. [2021-07-13 19:52:18,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50922 states, 50921 states have (on average 2.2044932346183304) internal successors, (112255), 50921 states have internal predecessors, (112255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50922 states to 50922 states and 112255 transitions. [2021-07-13 19:52:18,660 INFO L78 Accepts]: Start accepts. Automaton has 50922 states and 112255 transitions. Word has length 56 [2021-07-13 19:52:18,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:18,660 INFO L482 AbstractCegarLoop]: Abstraction has 50922 states and 112255 transitions. [2021-07-13 19:52:18,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:18,660 INFO L276 IsEmpty]: Start isEmpty. Operand 50922 states and 112255 transitions. [2021-07-13 19:52:18,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:18,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:18,692 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:18,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:18,893 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:18,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:18,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1623021617, now seen corresponding path program 57 times [2021-07-13 19:52:18,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:18,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076021985] [2021-07-13 19:52:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 53 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:18,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:18,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076021985] [2021-07-13 19:52:18,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076021985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:18,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452481467] [2021-07-13 19:52:18,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:18,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:52:18,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:18,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:18,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 53 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:19,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452481467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:19,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:19,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:52:19,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509679884] [2021-07-13 19:52:19,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:52:19,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:19,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:52:19,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:52:19,041 INFO L87 Difference]: Start difference. First operand 50922 states and 112255 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:19,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:19,515 INFO L93 Difference]: Finished difference Result 54000 states and 117977 transitions. [2021-07-13 19:52:19,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:52:19,515 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:52:19,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:19,618 INFO L225 Difference]: With dead ends: 54000 [2021-07-13 19:52:19,618 INFO L226 Difference]: Without dead ends: 53998 [2021-07-13 19:52:19,618 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:52:19,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53998 states. [2021-07-13 19:52:20,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53998 to 51006. [2021-07-13 19:52:20,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51006 states, 51005 states have (on average 2.203842760513675) internal successors, (112407), 51005 states have internal predecessors, (112407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51006 states to 51006 states and 112407 transitions. [2021-07-13 19:52:20,539 INFO L78 Accepts]: Start accepts. Automaton has 51006 states and 112407 transitions. Word has length 56 [2021-07-13 19:52:20,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:20,539 INFO L482 AbstractCegarLoop]: Abstraction has 51006 states and 112407 transitions. [2021-07-13 19:52:20,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:20,539 INFO L276 IsEmpty]: Start isEmpty. Operand 51006 states and 112407 transitions. [2021-07-13 19:52:20,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:20,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:20,796 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:21,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 19:52:21,009 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:21,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:21,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2092487685, now seen corresponding path program 58 times [2021-07-13 19:52:21,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:21,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528761650] [2021-07-13 19:52:21,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:21,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:21,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528761650] [2021-07-13 19:52:21,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528761650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:21,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061000948] [2021-07-13 19:52:21,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:21,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:21,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:21,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:21,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:21,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061000948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:21,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:21,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:52:21,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062175443] [2021-07-13 19:52:21,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:52:21,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:21,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:52:21,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:52:21,154 INFO L87 Difference]: Start difference. First operand 51006 states and 112407 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:21,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:21,421 INFO L93 Difference]: Finished difference Result 57784 states and 125981 transitions. [2021-07-13 19:52:21,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:52:21,421 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:52:21,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:21,532 INFO L225 Difference]: With dead ends: 57784 [2021-07-13 19:52:21,533 INFO L226 Difference]: Without dead ends: 57782 [2021-07-13 19:52:21,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:21,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57782 states. [2021-07-13 19:52:22,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57782 to 51426. [2021-07-13 19:52:22,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51426 states, 51425 states have (on average 2.202566844919786) internal successors, (113267), 51425 states have internal predecessors, (113267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:22,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51426 states to 51426 states and 113267 transitions. [2021-07-13 19:52:22,689 INFO L78 Accepts]: Start accepts. Automaton has 51426 states and 113267 transitions. Word has length 56 [2021-07-13 19:52:22,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:22,689 INFO L482 AbstractCegarLoop]: Abstraction has 51426 states and 113267 transitions. [2021-07-13 19:52:22,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:22,689 INFO L276 IsEmpty]: Start isEmpty. Operand 51426 states and 113267 transitions. [2021-07-13 19:52:22,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:22,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:22,722 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:22,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-07-13 19:52:22,924 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:22,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:22,924 INFO L82 PathProgramCache]: Analyzing trace with hash -749614681, now seen corresponding path program 59 times [2021-07-13 19:52:22,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:22,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037082761] [2021-07-13 19:52:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:22,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:22,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037082761] [2021-07-13 19:52:22,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037082761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:22,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681557445] [2021-07-13 19:52:22,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:23,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:52:23,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:23,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:23,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:23,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681557445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:23,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:23,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:52:23,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660337668] [2021-07-13 19:52:23,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:52:23,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:23,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:52:23,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:52:23,092 INFO L87 Difference]: Start difference. First operand 51426 states and 113267 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:23,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:23,461 INFO L93 Difference]: Finished difference Result 56504 states and 123265 transitions. [2021-07-13 19:52:23,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:52:23,461 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:52:23,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:23,566 INFO L225 Difference]: With dead ends: 56504 [2021-07-13 19:52:23,566 INFO L226 Difference]: Without dead ends: 56502 [2021-07-13 19:52:23,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:23,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56502 states. [2021-07-13 19:52:24,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56502 to 51506. [2021-07-13 19:52:24,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51506 states, 51505 states have (on average 2.2005436365401416) internal successors, (113339), 51505 states have internal predecessors, (113339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:24,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51506 states to 51506 states and 113339 transitions. [2021-07-13 19:52:24,687 INFO L78 Accepts]: Start accepts. Automaton has 51506 states and 113339 transitions. Word has length 56 [2021-07-13 19:52:24,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:24,688 INFO L482 AbstractCegarLoop]: Abstraction has 51506 states and 113339 transitions. [2021-07-13 19:52:24,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:24,688 INFO L276 IsEmpty]: Start isEmpty. Operand 51506 states and 113339 transitions. [2021-07-13 19:52:24,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:24,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:24,731 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:24,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:24,953 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:24,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:24,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1683881349, now seen corresponding path program 60 times [2021-07-13 19:52:24,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:24,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895115748] [2021-07-13 19:52:24,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:24,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:24,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895115748] [2021-07-13 19:52:24,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895115748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:24,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579251019] [2021-07-13 19:52:24,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:25,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:52:25,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:25,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:25,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:25,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579251019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:25,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:25,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:52:25,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285614830] [2021-07-13 19:52:25,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:52:25,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:25,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:52:25,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:52:25,108 INFO L87 Difference]: Start difference. First operand 51506 states and 113339 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:25,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:25,601 INFO L93 Difference]: Finished difference Result 53832 states and 117559 transitions. [2021-07-13 19:52:25,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:52:25,601 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:52:25,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:25,707 INFO L225 Difference]: With dead ends: 53832 [2021-07-13 19:52:25,707 INFO L226 Difference]: Without dead ends: 53830 [2021-07-13 19:52:25,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:25,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53830 states. [2021-07-13 19:52:26,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53830 to 49874. [2021-07-13 19:52:26,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49874 states, 49873 states have (on average 2.2004892426763982) internal successors, (109745), 49873 states have internal predecessors, (109745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:26,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49874 states to 49874 states and 109745 transitions. [2021-07-13 19:52:26,559 INFO L78 Accepts]: Start accepts. Automaton has 49874 states and 109745 transitions. Word has length 56 [2021-07-13 19:52:26,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:26,559 INFO L482 AbstractCegarLoop]: Abstraction has 49874 states and 109745 transitions. [2021-07-13 19:52:26,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:26,559 INFO L276 IsEmpty]: Start isEmpty. Operand 49874 states and 109745 transitions. [2021-07-13 19:52:26,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:26,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:26,592 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:26,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:26,793 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:26,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:26,793 INFO L82 PathProgramCache]: Analyzing trace with hash 490921767, now seen corresponding path program 61 times [2021-07-13 19:52:26,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:26,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375016213] [2021-07-13 19:52:26,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:52:26,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:26,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375016213] [2021-07-13 19:52:26,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375016213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:26,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246496536] [2021-07-13 19:52:26,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:52:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:26,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:26,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:52:26,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246496536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:26,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:26,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:52:26,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012238778] [2021-07-13 19:52:26,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:52:26,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:26,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:52:26,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:52:26,967 INFO L87 Difference]: Start difference. First operand 49874 states and 109745 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:27,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:27,586 INFO L93 Difference]: Finished difference Result 51331 states and 112086 transitions. [2021-07-13 19:52:27,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:52:27,587 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:52:27,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:27,710 INFO L225 Difference]: With dead ends: 51331 [2021-07-13 19:52:27,710 INFO L226 Difference]: Without dead ends: 51235 [2021-07-13 19:52:27,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:52:27,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51235 states. [2021-07-13 19:52:28,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51235 to 47230. [2021-07-13 19:52:28,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.193673378644477) internal successors, (103605), 47229 states have internal predecessors, (103605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:28,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103605 transitions. [2021-07-13 19:52:28,533 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103605 transitions. Word has length 56 [2021-07-13 19:52:28,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:28,534 INFO L482 AbstractCegarLoop]: Abstraction has 47230 states and 103605 transitions. [2021-07-13 19:52:28,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:28,534 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103605 transitions. [2021-07-13 19:52:28,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:28,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:28,566 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:28,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-13 19:52:28,767 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:28,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:28,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1012260677, now seen corresponding path program 62 times [2021-07-13 19:52:28,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:28,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139073715] [2021-07-13 19:52:28,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:52:28,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:28,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139073715] [2021-07-13 19:52:28,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139073715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:28,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128245511] [2021-07-13 19:52:28,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:52:28,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:28,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:28,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:28,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:52:28,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128245511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:28,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:28,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:52:28,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785098028] [2021-07-13 19:52:28,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:52:28,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:28,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:52:28,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:52:28,924 INFO L87 Difference]: Start difference. First operand 47230 states and 103605 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:29,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:29,425 INFO L93 Difference]: Finished difference Result 48435 states and 105506 transitions. [2021-07-13 19:52:29,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:52:29,426 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:52:29,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:29,521 INFO L225 Difference]: With dead ends: 48435 [2021-07-13 19:52:29,521 INFO L226 Difference]: Without dead ends: 48369 [2021-07-13 19:52:29,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:29,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48369 states. [2021-07-13 19:52:30,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48369 to 47230. [2021-07-13 19:52:30,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.1912172605814226) internal successors, (103489), 47229 states have internal predecessors, (103489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103489 transitions. [2021-07-13 19:52:30,268 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103489 transitions. Word has length 56 [2021-07-13 19:52:30,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:30,268 INFO L482 AbstractCegarLoop]: Abstraction has 47230 states and 103489 transitions. [2021-07-13 19:52:30,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:30,268 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103489 transitions. [2021-07-13 19:52:30,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:30,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:30,298 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:30,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:30,499 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:30,499 INFO L82 PathProgramCache]: Analyzing trace with hash 955997927, now seen corresponding path program 63 times [2021-07-13 19:52:30,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:30,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423553948] [2021-07-13 19:52:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:52:30,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:30,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423553948] [2021-07-13 19:52:30,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423553948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:30,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844846917] [2021-07-13 19:52:30,532 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 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 [2021-07-13 19:52:30,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:52:30,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:30,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:30,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:30,635 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:52:30,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844846917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:30,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:30,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:52:30,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459318416] [2021-07-13 19:52:30,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:52:30,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:30,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:52:30,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:52:30,636 INFO L87 Difference]: Start difference. First operand 47230 states and 103489 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:31,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:31,056 INFO L93 Difference]: Finished difference Result 48187 states and 104966 transitions. [2021-07-13 19:52:31,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:52:31,073 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:52:31,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:31,154 INFO L225 Difference]: With dead ends: 48187 [2021-07-13 19:52:31,154 INFO L226 Difference]: Without dead ends: 48151 [2021-07-13 19:52:31,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:31,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48151 states. [2021-07-13 19:52:31,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48151 to 47230. [2021-07-13 19:52:31,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.1896927735078022) internal successors, (103417), 47229 states have internal predecessors, (103417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:31,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103417 transitions. [2021-07-13 19:52:31,939 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103417 transitions. Word has length 56 [2021-07-13 19:52:31,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:31,939 INFO L482 AbstractCegarLoop]: Abstraction has 47230 states and 103417 transitions. [2021-07-13 19:52:31,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:31,939 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103417 transitions. [2021-07-13 19:52:31,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:31,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:31,971 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:32,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-07-13 19:52:32,172 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:32,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:32,172 INFO L82 PathProgramCache]: Analyzing trace with hash 539478395, now seen corresponding path program 64 times [2021-07-13 19:52:32,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:32,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416942841] [2021-07-13 19:52:32,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:32,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:32,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416942841] [2021-07-13 19:52:32,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416942841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:32,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550580831] [2021-07-13 19:52:32,203 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 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 [2021-07-13 19:52:32,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:32,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:32,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:32,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:32,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550580831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:32,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:32,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:52:32,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103798764] [2021-07-13 19:52:32,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:52:32,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:32,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:52:32,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:52:32,309 INFO L87 Difference]: Start difference. First operand 47230 states and 103417 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:32,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:32,726 INFO L93 Difference]: Finished difference Result 51250 states and 111816 transitions. [2021-07-13 19:52:32,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:52:32,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:52:32,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:32,816 INFO L225 Difference]: With dead ends: 51250 [2021-07-13 19:52:32,816 INFO L226 Difference]: Without dead ends: 51244 [2021-07-13 19:52:32,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:52:32,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51244 states. [2021-07-13 19:52:33,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51244 to 50262. [2021-07-13 19:52:33,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50262 states, 50261 states have (on average 2.194723543104992) internal successors, (110309), 50261 states have internal predecessors, (110309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:33,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50262 states to 50262 states and 110309 transitions. [2021-07-13 19:52:33,667 INFO L78 Accepts]: Start accepts. Automaton has 50262 states and 110309 transitions. Word has length 56 [2021-07-13 19:52:33,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:33,668 INFO L482 AbstractCegarLoop]: Abstraction has 50262 states and 110309 transitions. [2021-07-13 19:52:33,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:33,668 INFO L276 IsEmpty]: Start isEmpty. Operand 50262 states and 110309 transitions. [2021-07-13 19:52:33,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:33,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:33,701 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:33,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:33,902 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:33,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:33,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1813865935, now seen corresponding path program 65 times [2021-07-13 19:52:33,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:33,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841099972] [2021-07-13 19:52:33,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:33,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:33,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841099972] [2021-07-13 19:52:33,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841099972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:33,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211366265] [2021-07-13 19:52:33,934 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 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 [2021-07-13 19:52:33,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 19:52:33,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:33,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:33,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:34,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211366265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:34,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:34,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:52:34,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733152637] [2021-07-13 19:52:34,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:52:34,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:34,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:52:34,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:52:34,047 INFO L87 Difference]: Start difference. First operand 50262 states and 110309 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:34,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:34,491 INFO L93 Difference]: Finished difference Result 52650 states and 114688 transitions. [2021-07-13 19:52:34,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:52:34,492 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:52:34,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:34,604 INFO L225 Difference]: With dead ends: 52650 [2021-07-13 19:52:34,604 INFO L226 Difference]: Without dead ends: 52650 [2021-07-13 19:52:34,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:52:34,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52650 states. [2021-07-13 19:52:35,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52650 to 50294. [2021-07-13 19:52:35,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50294 states, 50293 states have (on average 2.1945996460740065) internal successors, (110373), 50293 states have internal predecessors, (110373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:35,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50294 states to 50294 states and 110373 transitions. [2021-07-13 19:52:35,446 INFO L78 Accepts]: Start accepts. Automaton has 50294 states and 110373 transitions. Word has length 56 [2021-07-13 19:52:35,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:35,446 INFO L482 AbstractCegarLoop]: Abstraction has 50294 states and 110373 transitions. [2021-07-13 19:52:35,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:35,446 INFO L276 IsEmpty]: Start isEmpty. Operand 50294 states and 110373 transitions. [2021-07-13 19:52:35,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:35,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:35,482 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:35,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-13 19:52:35,683 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:35,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:35,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1234407941, now seen corresponding path program 66 times [2021-07-13 19:52:35,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:35,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541291165] [2021-07-13 19:52:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:35,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:35,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541291165] [2021-07-13 19:52:35,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541291165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:35,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384131758] [2021-07-13 19:52:35,724 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 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 [2021-07-13 19:52:35,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:52:35,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:35,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:35,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:35,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384131758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:35,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:35,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:52:35,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324107214] [2021-07-13 19:52:35,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:52:35,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:35,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:52:35,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:52:35,844 INFO L87 Difference]: Start difference. First operand 50294 states and 110373 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:36,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:36,336 INFO L93 Difference]: Finished difference Result 56418 states and 122592 transitions. [2021-07-13 19:52:36,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:52:36,337 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:52:36,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:36,440 INFO L225 Difference]: With dead ends: 56418 [2021-07-13 19:52:36,440 INFO L226 Difference]: Without dead ends: 56418 [2021-07-13 19:52:36,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:52:36,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56418 states. [2021-07-13 19:52:37,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56418 to 50454. [2021-07-13 19:52:37,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50454 states, 50453 states have (on average 2.193982518383446) internal successors, (110693), 50453 states have internal predecessors, (110693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:37,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50454 states to 50454 states and 110693 transitions. [2021-07-13 19:52:37,317 INFO L78 Accepts]: Start accepts. Automaton has 50454 states and 110693 transitions. Word has length 56 [2021-07-13 19:52:37,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:37,317 INFO L482 AbstractCegarLoop]: Abstraction has 50454 states and 110693 transitions. [2021-07-13 19:52:37,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:37,317 INFO L276 IsEmpty]: Start isEmpty. Operand 50454 states and 110693 transitions. [2021-07-13 19:52:37,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:37,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:37,351 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:37,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:37,552 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:37,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:37,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1607694425, now seen corresponding path program 67 times [2021-07-13 19:52:37,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:37,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581115888] [2021-07-13 19:52:37,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:37,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:37,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581115888] [2021-07-13 19:52:37,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581115888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:37,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023203392] [2021-07-13 19:52:37,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:52:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:37,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:37,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:37,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023203392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:37,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:37,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:52:37,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885761890] [2021-07-13 19:52:37,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:52:37,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:37,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:52:37,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:52:37,956 INFO L87 Difference]: Start difference. First operand 50454 states and 110693 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:38,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:38,272 INFO L93 Difference]: Finished difference Result 56662 states and 123166 transitions. [2021-07-13 19:52:38,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:52:38,273 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:52:38,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:38,372 INFO L225 Difference]: With dead ends: 56662 [2021-07-13 19:52:38,372 INFO L226 Difference]: Without dead ends: 56662 [2021-07-13 19:52:38,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:52:38,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56662 states. [2021-07-13 19:52:39,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56662 to 50614. [2021-07-13 19:52:39,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50614 states, 50613 states have (on average 2.1933692924742654) internal successors, (111013), 50613 states have internal predecessors, (111013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:39,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50614 states to 50614 states and 111013 transitions. [2021-07-13 19:52:39,471 INFO L78 Accepts]: Start accepts. Automaton has 50614 states and 111013 transitions. Word has length 56 [2021-07-13 19:52:39,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:39,471 INFO L482 AbstractCegarLoop]: Abstraction has 50614 states and 111013 transitions. [2021-07-13 19:52:39,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:39,472 INFO L276 IsEmpty]: Start isEmpty. Operand 50614 states and 111013 transitions. [2021-07-13 19:52:39,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:39,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:39,506 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:39,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 19:52:39,706 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:39,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:39,707 INFO L82 PathProgramCache]: Analyzing trace with hash 825801605, now seen corresponding path program 68 times [2021-07-13 19:52:39,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:39,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446989730] [2021-07-13 19:52:39,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:39,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:39,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446989730] [2021-07-13 19:52:39,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446989730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:39,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089186127] [2021-07-13 19:52:39,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:39,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:39,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:39,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:39,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:39,864 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:39,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089186127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:39,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:39,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:52:39,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032241328] [2021-07-13 19:52:39,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:52:39,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:39,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:52:39,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:52:39,865 INFO L87 Difference]: Start difference. First operand 50614 states and 111013 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:40,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:40,177 INFO L93 Difference]: Finished difference Result 54674 states and 118916 transitions. [2021-07-13 19:52:40,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:52:40,178 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:52:40,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:40,278 INFO L225 Difference]: With dead ends: 54674 [2021-07-13 19:52:40,278 INFO L226 Difference]: Without dead ends: 54674 [2021-07-13 19:52:40,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:52:40,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54674 states. [2021-07-13 19:52:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54674 to 50774. [2021-07-13 19:52:41,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50774 states, 50773 states have (on average 2.192759931459634) internal successors, (111333), 50773 states have internal predecessors, (111333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50774 states to 50774 states and 111333 transitions. [2021-07-13 19:52:41,292 INFO L78 Accepts]: Start accepts. Automaton has 50774 states and 111333 transitions. Word has length 56 [2021-07-13 19:52:41,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:41,292 INFO L482 AbstractCegarLoop]: Abstraction has 50774 states and 111333 transitions. [2021-07-13 19:52:41,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:41,292 INFO L276 IsEmpty]: Start isEmpty. Operand 50774 states and 111333 transitions. [2021-07-13 19:52:41,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:52:41,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:41,327 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:41,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:41,528 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:41,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:41,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1100779175, now seen corresponding path program 69 times [2021-07-13 19:52:41,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:41,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887757540] [2021-07-13 19:52:41,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:41,589 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:41,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:41,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887757540] [2021-07-13 19:52:41,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887757540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:41,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155267001] [2021-07-13 19:52:41,589 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 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 [2021-07-13 19:52:41,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 19:52:41,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:41,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:52:41,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:41,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155267001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:41,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:41,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:52:41,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949859759] [2021-07-13 19:52:41,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:52:41,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:41,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:52:41,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:52:41,703 INFO L87 Difference]: Start difference. First operand 50774 states and 111333 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:42,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:42,071 INFO L93 Difference]: Finished difference Result 52880 states and 115293 transitions. [2021-07-13 19:52:42,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:52:42,071 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:52:42,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:42,166 INFO L225 Difference]: With dead ends: 52880 [2021-07-13 19:52:42,166 INFO L226 Difference]: Without dead ends: 52880 [2021-07-13 19:52:42,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:52:42,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52880 states. [2021-07-13 19:52:43,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52880 to 49354. [2021-07-13 19:52:43,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49354 states, 49353 states have (on average 2.193686300731465) internal successors, (108265), 49353 states have internal predecessors, (108265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:43,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49354 states to 49354 states and 108265 transitions. [2021-07-13 19:52:43,190 INFO L78 Accepts]: Start accepts. Automaton has 49354 states and 108265 transitions. Word has length 56 [2021-07-13 19:52:43,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:43,190 INFO L482 AbstractCegarLoop]: Abstraction has 49354 states and 108265 transitions. [2021-07-13 19:52:43,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:43,190 INFO L276 IsEmpty]: Start isEmpty. Operand 49354 states and 108265 transitions. [2021-07-13 19:52:43,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-13 19:52:43,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:43,237 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:43,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:43,438 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:43,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:43,438 INFO L82 PathProgramCache]: Analyzing trace with hash -2086693413, now seen corresponding path program 70 times [2021-07-13 19:52:43,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:43,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060559064] [2021-07-13 19:52:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:43,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:43,549 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:43,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:43,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060559064] [2021-07-13 19:52:43,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060559064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:43,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861964308] [2021-07-13 19:52:43,550 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 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 [2021-07-13 19:52:43,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:43,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:43,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:52:43,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:43,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861964308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:43,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:43,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-13 19:52:43,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912290456] [2021-07-13 19:52:43,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:52:43,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:43,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:52:43,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:52:43,690 INFO L87 Difference]: Start difference. First operand 49354 states and 108265 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 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) [2021-07-13 19:52:44,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:44,507 INFO L93 Difference]: Finished difference Result 55302 states and 120443 transitions. [2021-07-13 19:52:44,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:52:44,509 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 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 66 [2021-07-13 19:52:44,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:44,625 INFO L225 Difference]: With dead ends: 55302 [2021-07-13 19:52:44,625 INFO L226 Difference]: Without dead ends: 55302 [2021-07-13 19:52:44,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 174.4ms TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:52:44,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55302 states. [2021-07-13 19:52:45,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55302 to 49998. [2021-07-13 19:52:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49998 states, 49997 states have (on average 2.195831749904994) internal successors, (109785), 49997 states have internal predecessors, (109785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:45,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49998 states to 49998 states and 109785 transitions. [2021-07-13 19:52:45,435 INFO L78 Accepts]: Start accepts. Automaton has 49998 states and 109785 transitions. Word has length 66 [2021-07-13 19:52:45,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:45,435 INFO L482 AbstractCegarLoop]: Abstraction has 49998 states and 109785 transitions. [2021-07-13 19:52:45,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 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) [2021-07-13 19:52:45,435 INFO L276 IsEmpty]: Start isEmpty. Operand 49998 states and 109785 transitions. [2021-07-13 19:52:45,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-13 19:52:45,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:45,483 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:45,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:45,684 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:45,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1680670435, now seen corresponding path program 71 times [2021-07-13 19:52:45,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:45,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055131042] [2021-07-13 19:52:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:45,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:45,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055131042] [2021-07-13 19:52:45,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055131042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:45,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099496112] [2021-07-13 19:52:45,729 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 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 [2021-07-13 19:52:45,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:52:45,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:45,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:52:45,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:45,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099496112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:45,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:45,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:52:45,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958097508] [2021-07-13 19:52:45,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:52:45,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:45,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:52:45,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:52:45,870 INFO L87 Difference]: Start difference. First operand 49998 states and 109785 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-07-13 19:52:46,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:46,511 INFO L93 Difference]: Finished difference Result 51084 states and 111615 transitions. [2021-07-13 19:52:46,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:52:46,511 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 66 [2021-07-13 19:52:46,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:46,648 INFO L225 Difference]: With dead ends: 51084 [2021-07-13 19:52:46,648 INFO L226 Difference]: Without dead ends: 51076 [2021-07-13 19:52:46,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:46,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51076 states. [2021-07-13 19:52:47,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51076 to 49894. [2021-07-13 19:52:47,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49894 states, 49893 states have (on average 2.193995149620187) internal successors, (109465), 49893 states have internal predecessors, (109465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49894 states to 49894 states and 109465 transitions. [2021-07-13 19:52:47,476 INFO L78 Accepts]: Start accepts. Automaton has 49894 states and 109465 transitions. Word has length 66 [2021-07-13 19:52:47,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:47,476 INFO L482 AbstractCegarLoop]: Abstraction has 49894 states and 109465 transitions. [2021-07-13 19:52:47,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-07-13 19:52:47,476 INFO L276 IsEmpty]: Start isEmpty. Operand 49894 states and 109465 transitions. [2021-07-13 19:52:47,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-13 19:52:47,524 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:47,524 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:47,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:47,724 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:47,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1317782919, now seen corresponding path program 72 times [2021-07-13 19:52:47,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:47,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646923731] [2021-07-13 19:52:47,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:47,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:47,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646923731] [2021-07-13 19:52:47,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646923731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:47,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866490329] [2021-07-13 19:52:47,765 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 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 [2021-07-13 19:52:47,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:52:47,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:47,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:52:47,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:47,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866490329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:47,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:47,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:52:47,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241728618] [2021-07-13 19:52:47,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:52:47,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:47,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:52:47,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:52:47,907 INFO L87 Difference]: Start difference. First operand 49894 states and 109465 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-07-13 19:52:48,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:48,476 INFO L93 Difference]: Finished difference Result 58739 states and 127815 transitions. [2021-07-13 19:52:48,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:52:48,477 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 66 [2021-07-13 19:52:48,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:48,617 INFO L225 Difference]: With dead ends: 58739 [2021-07-13 19:52:48,617 INFO L226 Difference]: Without dead ends: 58739 [2021-07-13 19:52:48,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:48,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58739 states. [2021-07-13 19:52:49,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58739 to 53954. [2021-07-13 19:52:49,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53954 states, 53953 states have (on average 2.204678145793561) internal successors, (118949), 53953 states have internal predecessors, (118949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:49,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53954 states to 53954 states and 118949 transitions. [2021-07-13 19:52:49,584 INFO L78 Accepts]: Start accepts. Automaton has 53954 states and 118949 transitions. Word has length 66 [2021-07-13 19:52:49,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:49,584 INFO L482 AbstractCegarLoop]: Abstraction has 53954 states and 118949 transitions. [2021-07-13 19:52:49,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-07-13 19:52:49,585 INFO L276 IsEmpty]: Start isEmpty. Operand 53954 states and 118949 transitions. [2021-07-13 19:52:49,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-13 19:52:49,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:49,874 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:50,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:50,091 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:50,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:50,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1807128377, now seen corresponding path program 73 times [2021-07-13 19:52:50,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:50,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985806364] [2021-07-13 19:52:50,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:50,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:50,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985806364] [2021-07-13 19:52:50,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985806364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:50,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600500657] [2021-07-13 19:52:50,128 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 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 [2021-07-13 19:52:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:50,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:52:50,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:50,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600500657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:50,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:50,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:52:50,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134796103] [2021-07-13 19:52:50,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:52:50,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:50,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:52:50,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:52:50,243 INFO L87 Difference]: Start difference. First operand 53954 states and 118949 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-07-13 19:52:50,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:50,535 INFO L93 Difference]: Finished difference Result 56467 states and 123155 transitions. [2021-07-13 19:52:50,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:52:50,535 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 66 [2021-07-13 19:52:50,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:50,639 INFO L225 Difference]: With dead ends: 56467 [2021-07-13 19:52:50,640 INFO L226 Difference]: Without dead ends: 56375 [2021-07-13 19:52:50,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:50,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56375 states. [2021-07-13 19:52:51,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56375 to 51614. [2021-07-13 19:52:51,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51614 states, 51613 states have (on average 2.1976827543448354) internal successors, (113429), 51613 states have internal predecessors, (113429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:51,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51614 states to 51614 states and 113429 transitions. [2021-07-13 19:52:51,721 INFO L78 Accepts]: Start accepts. Automaton has 51614 states and 113429 transitions. Word has length 66 [2021-07-13 19:52:51,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:51,721 INFO L482 AbstractCegarLoop]: Abstraction has 51614 states and 113429 transitions. [2021-07-13 19:52:51,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-07-13 19:52:51,721 INFO L276 IsEmpty]: Start isEmpty. Operand 51614 states and 113429 transitions. [2021-07-13 19:52:51,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-13 19:52:51,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:51,770 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:51,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:51,973 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:51,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:51,973 INFO L82 PathProgramCache]: Analyzing trace with hash -48900947, now seen corresponding path program 74 times [2021-07-13 19:52:51,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:51,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209815674] [2021-07-13 19:52:51,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:52,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:52,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209815674] [2021-07-13 19:52:52,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209815674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:52,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612313725] [2021-07-13 19:52:52,018 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 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 [2021-07-13 19:52:52,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:52:52,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:52,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:52:52,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:52:52,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612313725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:52,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:52,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:52:52,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364948019] [2021-07-13 19:52:52,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:52:52,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:52,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:52:52,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:52:52,147 INFO L87 Difference]: Start difference. First operand 51614 states and 113429 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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) [2021-07-13 19:52:52,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:52,448 INFO L93 Difference]: Finished difference Result 53573 states and 116784 transitions. [2021-07-13 19:52:52,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:52:52,449 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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 66 [2021-07-13 19:52:52,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:52,549 INFO L225 Difference]: With dead ends: 53573 [2021-07-13 19:52:52,549 INFO L226 Difference]: Without dead ends: 53525 [2021-07-13 19:52:52,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:52,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53525 states. [2021-07-13 19:52:53,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53525 to 51614. [2021-07-13 19:52:53,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51614 states, 51613 states have (on average 2.196520256524519) internal successors, (113369), 51613 states have internal predecessors, (113369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:53,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51614 states to 51614 states and 113369 transitions. [2021-07-13 19:52:53,628 INFO L78 Accepts]: Start accepts. Automaton has 51614 states and 113369 transitions. Word has length 66 [2021-07-13 19:52:53,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:53,628 INFO L482 AbstractCegarLoop]: Abstraction has 51614 states and 113369 transitions. [2021-07-13 19:52:53,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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) [2021-07-13 19:52:53,629 INFO L276 IsEmpty]: Start isEmpty. Operand 51614 states and 113369 transitions. [2021-07-13 19:52:53,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-13 19:52:53,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:53,680 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:53,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:53,881 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:53,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:53,881 INFO L82 PathProgramCache]: Analyzing trace with hash 2018785627, now seen corresponding path program 75 times [2021-07-13 19:52:53,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:53,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238741156] [2021-07-13 19:52:53,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 89 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 19:52:53,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:53,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238741156] [2021-07-13 19:52:53,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238741156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:53,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324388546] [2021-07-13 19:52:53,918 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 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 [2021-07-13 19:52:53,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:52:53,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:53,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:52:53,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 89 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 19:52:54,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324388546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:54,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:54,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:52:54,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204534515] [2021-07-13 19:52:54,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:52:54,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:54,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:52:54,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:52:54,061 INFO L87 Difference]: Start difference. First operand 51614 states and 113369 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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) [2021-07-13 19:52:54,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:54,564 INFO L93 Difference]: Finished difference Result 66038 states and 143412 transitions. [2021-07-13 19:52:54,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:52:54,565 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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 66 [2021-07-13 19:52:54,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:54,688 INFO L225 Difference]: With dead ends: 66038 [2021-07-13 19:52:54,688 INFO L226 Difference]: Without dead ends: 66011 [2021-07-13 19:52:54,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:52:54,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66011 states. [2021-07-13 19:52:55,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66011 to 55054. [2021-07-13 19:52:55,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55054 states, 55053 states have (on average 2.1976822334840973) internal successors, (120989), 55053 states have internal predecessors, (120989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:55,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55054 states to 55054 states and 120989 transitions. [2021-07-13 19:52:55,625 INFO L78 Accepts]: Start accepts. Automaton has 55054 states and 120989 transitions. Word has length 66 [2021-07-13 19:52:55,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:55,625 INFO L482 AbstractCegarLoop]: Abstraction has 55054 states and 120989 transitions. [2021-07-13 19:52:55,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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) [2021-07-13 19:52:55,625 INFO L276 IsEmpty]: Start isEmpty. Operand 55054 states and 120989 transitions. [2021-07-13 19:52:55,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-13 19:52:55,676 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:55,676 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:55,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-13 19:52:55,877 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:55,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:55,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1989858459, now seen corresponding path program 76 times [2021-07-13 19:52:55,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:55,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124340100] [2021-07-13 19:52:55,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:55,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:55,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124340100] [2021-07-13 19:52:55,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124340100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:55,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443598439] [2021-07-13 19:52:55,917 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 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 [2021-07-13 19:52:55,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:52:55,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:55,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:52:55,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:56,157 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 19:52:56,263 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:56,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443598439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:56,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:56,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:52:56,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521233132] [2021-07-13 19:52:56,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:52:56,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:56,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:52:56,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:52:56,265 INFO L87 Difference]: Start difference. First operand 55054 states and 120989 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-07-13 19:52:56,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:56,532 INFO L93 Difference]: Finished difference Result 64613 states and 140751 transitions. [2021-07-13 19:52:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:52:56,532 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 66 [2021-07-13 19:52:56,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:56,651 INFO L225 Difference]: With dead ends: 64613 [2021-07-13 19:52:56,651 INFO L226 Difference]: Without dead ends: 64613 [2021-07-13 19:52:56,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:56,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64613 states. [2021-07-13 19:52:57,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64613 to 59214. [2021-07-13 19:52:57,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59214 states, 59213 states have (on average 2.2070322395419923) internal successors, (130685), 59213 states have internal predecessors, (130685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:57,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59214 states to 59214 states and 130685 transitions. [2021-07-13 19:52:57,843 INFO L78 Accepts]: Start accepts. Automaton has 59214 states and 130685 transitions. Word has length 66 [2021-07-13 19:52:57,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:57,843 INFO L482 AbstractCegarLoop]: Abstraction has 59214 states and 130685 transitions. [2021-07-13 19:52:57,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-07-13 19:52:57,843 INFO L276 IsEmpty]: Start isEmpty. Operand 59214 states and 130685 transitions. [2021-07-13 19:52:57,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-13 19:52:57,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:52:57,892 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:52:58,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:52:58,093 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:52:58,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:52:58,093 INFO L82 PathProgramCache]: Analyzing trace with hash -819802459, now seen corresponding path program 77 times [2021-07-13 19:52:58,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:52:58,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235326803] [2021-07-13 19:52:58,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:52:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:52:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:58,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:52:58,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235326803] [2021-07-13 19:52:58,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235326803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:58,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721332076] [2021-07-13 19:52:58,127 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 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 [2021-07-13 19:52:58,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 19:52:58,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:52:58,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:52:58,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:52:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:52:58,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721332076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:52:58,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:52:58,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:52:58,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251793013] [2021-07-13 19:52:58,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:52:58,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:52:58,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:52:58,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:52:58,239 INFO L87 Difference]: Start difference. First operand 59214 states and 130685 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-07-13 19:52:58,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:52:58,759 INFO L93 Difference]: Finished difference Result 61966 states and 135259 transitions. [2021-07-13 19:52:58,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:52:58,759 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 66 [2021-07-13 19:52:58,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:52:58,874 INFO L225 Difference]: With dead ends: 61966 [2021-07-13 19:52:58,874 INFO L226 Difference]: Without dead ends: 61870 [2021-07-13 19:52:58,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:52:58,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61870 states. [2021-07-13 19:52:59,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61870 to 56914. [2021-07-13 19:52:59,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56914 states, 56913 states have (on average 2.2002178764078506) internal successors, (125221), 56913 states have internal predecessors, (125221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:52:59,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56914 states to 56914 states and 125221 transitions. [2021-07-13 19:52:59,833 INFO L78 Accepts]: Start accepts. Automaton has 56914 states and 125221 transitions. Word has length 66 [2021-07-13 19:52:59,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:52:59,834 INFO L482 AbstractCegarLoop]: Abstraction has 56914 states and 125221 transitions. [2021-07-13 19:52:59,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-07-13 19:52:59,834 INFO L276 IsEmpty]: Start isEmpty. Operand 56914 states and 125221 transitions. [2021-07-13 19:53:00,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-13 19:53:00,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:00,101 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:00,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-13 19:53:00,317 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:00,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:00,317 INFO L82 PathProgramCache]: Analyzing trace with hash 938424971, now seen corresponding path program 78 times [2021-07-13 19:53:00,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:00,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561243790] [2021-07-13 19:53:00,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 46 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:53:00,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:00,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561243790] [2021-07-13 19:53:00,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561243790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:00,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985195888] [2021-07-13 19:53:00,354 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 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 [2021-07-13 19:53:00,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:53:00,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:00,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:53:00,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 46 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:53:00,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985195888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:00,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:00,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:53:00,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716978189] [2021-07-13 19:53:00,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:53:00,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:00,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:53:00,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:53:00,470 INFO L87 Difference]: Start difference. First operand 56914 states and 125221 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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) [2021-07-13 19:53:00,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:00,770 INFO L93 Difference]: Finished difference Result 59554 states and 129655 transitions. [2021-07-13 19:53:00,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:53:00,770 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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 66 [2021-07-13 19:53:00,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:00,875 INFO L225 Difference]: With dead ends: 59554 [2021-07-13 19:53:00,875 INFO L226 Difference]: Without dead ends: 59458 [2021-07-13 19:53:00,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:53:00,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59458 states. [2021-07-13 19:53:01,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59458 to 56894. [2021-07-13 19:53:01,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56894 states, 56893 states have (on average 2.1983548063909444) internal successors, (125071), 56893 states have internal predecessors, (125071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56894 states to 56894 states and 125071 transitions. [2021-07-13 19:53:02,018 INFO L78 Accepts]: Start accepts. Automaton has 56894 states and 125071 transitions. Word has length 66 [2021-07-13 19:53:02,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:02,018 INFO L482 AbstractCegarLoop]: Abstraction has 56894 states and 125071 transitions. [2021-07-13 19:53:02,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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) [2021-07-13 19:53:02,018 INFO L276 IsEmpty]: Start isEmpty. Operand 56894 states and 125071 transitions. [2021-07-13 19:53:02,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-13 19:53:02,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:02,070 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:02,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:02,270 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:02,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:02,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1994510875, now seen corresponding path program 79 times [2021-07-13 19:53:02,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:02,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853127208] [2021-07-13 19:53:02,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:02,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:02,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853127208] [2021-07-13 19:53:02,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853127208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:02,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286723643] [2021-07-13 19:53:02,314 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 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 [2021-07-13 19:53:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:02,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:53:02,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:02,422 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:53:02,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286723643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:02,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:02,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:53:02,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766835373] [2021-07-13 19:53:02,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:53:02,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:02,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:53:02,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:53:02,423 INFO L87 Difference]: Start difference. First operand 56894 states and 125071 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 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) [2021-07-13 19:53:02,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:02,976 INFO L93 Difference]: Finished difference Result 59114 states and 128843 transitions. [2021-07-13 19:53:02,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:53:02,976 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 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 66 [2021-07-13 19:53:02,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:03,086 INFO L225 Difference]: With dead ends: 59114 [2021-07-13 19:53:03,087 INFO L226 Difference]: Without dead ends: 58982 [2021-07-13 19:53:03,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:53:03,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58982 states. [2021-07-13 19:53:03,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58982 to 56922. [2021-07-13 19:53:03,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56922 states, 56921 states have (on average 2.1963950036014825) internal successors, (125021), 56921 states have internal predecessors, (125021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:04,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56922 states to 56922 states and 125021 transitions. [2021-07-13 19:53:04,036 INFO L78 Accepts]: Start accepts. Automaton has 56922 states and 125021 transitions. Word has length 66 [2021-07-13 19:53:04,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:04,036 INFO L482 AbstractCegarLoop]: Abstraction has 56922 states and 125021 transitions. [2021-07-13 19:53:04,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 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) [2021-07-13 19:53:04,036 INFO L276 IsEmpty]: Start isEmpty. Operand 56922 states and 125021 transitions. [2021-07-13 19:53:04,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-13 19:53:04,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:04,092 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:04,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:04,292 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:04,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:04,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1160705883, now seen corresponding path program 80 times [2021-07-13 19:53:04,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:04,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46062951] [2021-07-13 19:53:04,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:04,512 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-13 19:53:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 95 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 19:53:04,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:04,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46062951] [2021-07-13 19:53:04,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46062951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:04,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239486550] [2021-07-13 19:53:04,570 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 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 [2021-07-13 19:53:04,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:53:04,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:53:04,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:53:04,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:53:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 95 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 19:53:04,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239486550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:04,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:53:04,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:53:04,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224919389] [2021-07-13 19:53:04,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:53:04,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:53:04,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:53:04,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:53:04,705 INFO L87 Difference]: Start difference. First operand 56922 states and 125021 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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) [2021-07-13 19:53:04,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:53:04,985 INFO L93 Difference]: Finished difference Result 69297 states and 150869 transitions. [2021-07-13 19:53:04,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:53:04,986 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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 66 [2021-07-13 19:53:04,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:53:05,108 INFO L225 Difference]: With dead ends: 69297 [2021-07-13 19:53:05,108 INFO L226 Difference]: Without dead ends: 69270 [2021-07-13 19:53:05,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:53:05,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69270 states. [2021-07-13 19:53:06,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69270 to 56622. [2021-07-13 19:53:06,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56622 states, 56621 states have (on average 2.1971529997704033) internal successors, (124405), 56621 states have internal predecessors, (124405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:53:06,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56622 states to 56622 states and 124405 transitions. [2021-07-13 19:53:06,491 INFO L78 Accepts]: Start accepts. Automaton has 56622 states and 124405 transitions. Word has length 66 [2021-07-13 19:53:06,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:53:06,491 INFO L482 AbstractCegarLoop]: Abstraction has 56622 states and 124405 transitions. [2021-07-13 19:53:06,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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) [2021-07-13 19:53:06,492 INFO L276 IsEmpty]: Start isEmpty. Operand 56622 states and 124405 transitions. [2021-07-13 19:53:06,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-07-13 19:53:06,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:53:06,556 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:53:06,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:53:06,791 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:53:06,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:53:06,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1722006663, now seen corresponding path program 81 times [2021-07-13 19:53:06,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:53:06,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342805511] [2021-07-13 19:53:06,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:53:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:53:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 19 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:53:06,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:53:06,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342805511] [2021-07-13 19:53:06,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342805511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:53:06,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762410449] [2021-07-13 19:53:06,839 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 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